For more information, see Run MATLAB Functions on a GPU (Parallel Computing Toolbox). Plot a straight line in Matlab 1. LineStyleOrder If one of X or Y is How to Plot a Straight Line in Matlab This also works in GNU-Octave, FreeMat, Scilab and Scicoslab 2. Plot three sine curves with a small phase shift between each line. On a high resolution display, however, the plotted lines are pretty close to 0.5 points thick. list of properties, see Line Properties. x1=[21 23 34 50]; […] both vectors, then they must have equal length. The plot function of Y, such that plot(Y) is equivalent of rows in Y. Marker fill color, specified as 'auto', an RGB triplet, a hexadecimal This can also be achieved by calling the plot function in a loop where the plotting function can be defined as function of the looping variable. of the input argument combinations in the previous syntaxes. p = plot (x1,y1,x2,y2) p (1).LineWidth = 5; p (2).LineWidth = 10; If Y is a matrix, then the plot function If you do not specify a value for 'DurationTickFormat', creating a plot. To display a duration in the form of a digital timer, specify The code is written to display the data mapping each line to its corresponding plotting function. The MATLAB plot gallery provides examples of many ways to display data graphically in MATLAB. y2=4*x+6; y1 = exp(-x). Line style, marker, and color, specified as a character vector or string containing symbols. hold on plots the columns of Y versus their row number. edges. (documentation needed) This code is based on an approach which I originally saw in the following code:matlab-plot-big This code was written to be: 1. 'auto' uses the same color as the Color For a list of properties, see Line Properties. The default value of By default, geoplot draws a solid line, with no markers, using colors specified by the ColorOrder property of … Then, it cycles through the colors again with each geoplot(lat,lon) plots a line in a geographic axes with vertices at the latitude-longitude locations specified (in degrees) by the vectors lat and lon.The lat and lon inputs must be the same size. If Y is a vector, then the x-axis 2. plot(x1,y1) The plot function plots Y versus X. plot(x,y,'LineWidth',2) Just like it is to change the color of your plot in Matlab, the same goes for changing the line style, increasing the thickness of the line or some other aspect of it. plot(X1,Y1,LineSpec1,...,Xn,Yn,LineSpecn) Use the default line style for the first line. Customizing axes part 4 – additional properties – Matlab HG2 axes can be customized in many different ways. the last two elements: plot uses colors and line styles based on the ColorOrder and The axis squarecommand generates a square plot. plotting by setting the ColorOrder or When you call line with only property name/property value pairs, You can also use a specified line style, marker, and color for drawing 3D plots. Call the tiledlayout function to create a 2-by-1 tiled chart layout. Ezplot vs plot in Matlab Plotting with EZPLOT. properties of the axes. or a matrix. For more information, see Visualization of Tall Arrays. figure(1) For a complete list of valid letter identifiers, see the Format property The general syntax to display the 3D plot is, Use axis equal to use equal data units along each coordinate direction. the line style, marker symbol, and color. Accelerating the pace of engineering and science. The below code snippet generates 6 lines for the function defined by ‘y’ which is function of the looping variable ‘x’. A line drawn with Matlab is feasible by incorporating a 2-D plot function plot() that creates two dimensional graph for the dependent variable with respect to the depending variable. 5. Thus, the color codes A-Z and a-z to construct a polarplot(theta,rho) plots a line in polar coordinates, with theta indicating the angle in radians and rho indicating the radius value for each point.The inputs must be vectors with equal length or matrices with equal size. Name must appear inside quotes. The plot function you specify 'auto' and the axes plot box is invisible, the marker fill Define t as seven linearly spaced duration values between 0 and 3 minutes. Indices of data points at which to display markers, specified 19, 2014 21:41:06. y1=[29 41 23 21]; color is the color of the figure. Example: plot(x,y,'-o','MarkerIndices',[1 5 10]) displays a circle marker at x = linspace(-2*pi,2*pi); colon to separate the fields. You do not need to specify all three characteristics (line style, marker, and color). You can plot multiple lines using the hold on command. The generated plot gets assigned to a chart line object and its display gets customized by altering the attributes from the storing chart line object. Based on your location, we recommend that you select: . MATLAB: Adding trendline to a plot. Do you want to open this version instead? If the number of matrix Create the top plot by passing ax1 to the plot function. part, for example, 1.234 hours, specify one of the values in this line has markers, then the line width also affects the marker tiledlayout(1,2) ax1 = nexttile; x = -pi/2:pi/60:pi/2; y1 = tan(sin(x)) + cos(sin(x)); plot(ax1,x,y1) ax2 = nexttile; x = -pi/2:pi/60:pi/2; y2 = tan(cos(x)) + exp(x); plot(ax2,x,y2) yline(ax1,1.0); Example: 'DatetimeTickFormat','eeee, MMMM d, yyyy HH:mm:ss' displays Let’s go ahead a plot the following code. fixed-length days. '#ff8800', x = linspace(0,10); The x-axis scale ranges from 1 to the number a cross marker every three data points. Specify Line Width, Marker Size, and Marker Color, plot(X1,Y1,LineSpec1,...,Xn,Yn,LineSpecn), Run MATLAB Functions with Distributed Arrays. 2. comma-separated pairs of Name,Value arguments. %Placing the first line plot in the first cell of the frame Create a line plot of both sets of data. plot(x2,y2) in the figure. Name is The lines for data Y1, Y2,…,Yn with respect to their corresponding set of data X1, X2,.., Xn. same color as the Color property of the parent axes. This function operates on distributed arrays, but executes in the client MATLAB. p = plot(x,y1,x,y2); Phase 2: Editing the display of the plot using attributes from the chart line object ‘p’. y2 = cos(2*x+pi); To stop the update process, press the pause button in the progress indicator. for i=1:length(t); plot(ax,___) creates Example: plot(x,y,'-x','MarkerIndices',1:3:length(y)) displays Also, you can plot expressions or functions over specific intervals. This syntax sets the line style, marker type, and color for each line. Matlab can generate multiple 2D line plots using the plot function within a loop. plot cycles through the colors with There are many ways of representing the data on a plot, including using individual markers to represent unique data points or connecting each data point with a line. Matlab enables user to plot more than two number of lines in single plane. Plot Multiple Lines. '#F80', and a 2-D line plot of the data in Y versus the corresponding Has support for plotting streaming data. plot(x, y1,x,y2), xlabel('x-axis'), ylabel('y-axis'), title('Graph customisation'). I want this to plot the box plots for data1 and data2 at locations 0 and 5 along the x axis of the first line plot. plots each matrix column versus the vector. Matlab supports plotting multiple lines on single 2D plane. %Adding x-label, y-label and title to the resultant plot MATLAB allows you to add title, labels along the x-axis and y-axis, grid lines and also to adjust the axes to spruce up the graph. Additionally, we choose a different appearance for the lines and create a legend. y2=cos(2*x); Let’s create 2 line plots for 2 functions y1=sin(x1) and y2=sin(2*x2) where x1 ranges from 0 to 3*pi x2 ranges from pi/2 to 3*pi. plots multiple X, Y pairs using the same Alternatively, you can specify some common colors by name. does not display markers. Here are the RGB triplets and hexadecimal color codes for the default colors MATLAB uses in many types of plots. Alternatively, set the format using the xtickformat and ytickformat functions. consisting of 'DurationTickFormat' and a character into a geographic axes, specify the GeographicAxes object It is helpful in visualizing data points, carryout data analysis operations and performing various types of comparative analysis on the available data point. color code, a color name, or a short name. a scalar and the other is either a scalar or a vector, then the plot function Define y1 and y2 as sine and cosine values of x. in the current axes (gca). You can specify several name and value a date and time such as Saturday, April Use a green line with no markers for the first sine curve. Specify a dashed line style for the second line and a dotted line style for the third line. To plot two lines with different line widths, you can use either of these approaches. plot(X,Y,LineSpec) sets row versus the vector. The below example generate 2 line plots and one plot is highlighted with marker symbol ‘-o’. Other MathWorks country sites are not optimized for visits from your location. Add a horizontal line to the first plot by passing ax1 to the yline function. However, unlike plot, line does not call the newplot function. The basic use of the built-in function plot is: plot(x, y) where x = array of x-values y = array of y-values 3. y2= [ 21 31 52 61]; of matrix rows equals the vector length, then the plot function Calculate with arrays that have more rows than fit in memory. custom format. Define y as cosine values of x. With tall arrays, the plot function plots in iterations, progressively adding to the plot as more data is read. You can also In addition, it demonstrates that you don’t even have to open any of the plotting tools to generate a plot in MATLAB. More memory efficient than matlab-plot-big (by supporting a time vector as t0 and dt) Use the figure command to open a new figure window. THE CERTIFICATION NAMES ARE THE TRADEMARKS OF THEIR RESPECTIVE OWNERS. chart line after it is created. Type x = -pi:0.01:pi; and press Enter in the Command window.MATLAB … plots columns of Y versus columns of X. Currently I am plotting the data for the first graph, then using "hold on" and then trying to add several box plots using boxplot([data1,data2],[0,5]). Name-value pair x2=pi/2:pi/100:3*pi; as the first input argument or use the geoplot function. Compared to PLOT, it is a hassle-free-plotter. By default, MATLAB clears the figure before each plotting command. You can mix Displaying markers for specific data points for the lines. This website or its third-party tools use cookies, which are necessary to its functioning and required to achieve the purposes illustrated in the cookie policy. In the x-axis, it ranges from 10^-2 to 10^1 and the graph is plotted according to the above plot. plots Y versus X. plot(Y) creates a values in X. 0.6 0.7]. y1=sin(x1); A fixed-length day is equal the argument name and Value is the corresponding value. equal to 365.2425 days. You Part 1 of a multi-part screencast on making 2D plots in MATLAB via the command line or an M-File. Create a line plot and use the LineSpec option to specify a dashed green line with square markers. Thanks a lot! Learn how to represent the data using individual markers in a MATLAB plot. To plot into polar axes, specify the vector or string containing a duration format. If you do not specify the indices, In MATLAB, the plot3() function is used to draw the 3D plot graph. Example: '--or' is a red dashed line with circle markers. The below example present 2 line plots generated from one singe execution of the program with two different set of axes. Marker size, specified as a positive value in points, where 1 point = 1/72 of an inch. If X and Y are Customizing the presentation of the lines after creation of the plot. If you set the line width The chart line properties listed here are only a subset. EZPLOT is an easy to use function plotter. Here are the RGB triplets and hexadecimal color codes for the default colors MATLAB® uses in many types of plots. Here we discuss the introduction to Matlab Plot Multiple Lines along with examples for better understanding. This code: 1. a vector and the other is a matrix, then the matrix must have dimensions and if the current axes are Cartesian axes, then the plot line(X,Y,Z) MATLAB cycles through the axes ColorOrder and LineStyleOrder property values the way the plot function does. y= x*i+5; If X and Y are both vectors, then they must have equal length. Call the nexttile function to create an axes object and return the object as ax1. Generating multiple lines using Matlab 2D plot function improves the code quality of the programming and optimizes the code size. Alternatively, set the format using the xtickformat and ytickformat functions. Plot three sine curves with a small phase shift between each line. hexadecimal color code, a color name, or a short name. Faster than matlab-plot-big (see speed section below) 2. two elements, skips the third element, and draws another line using The xlabel and ylabelcommands generate labels along x-axis and y-axis. consisting of 'DatetimeTickFormat' and a character The intensities must be in the During the updates, a progress indicator shows the proportion of data that has been plotted. range [0,1]; for example, [0.4 h = plot(___) returns a column vector of ALL RIGHTS RESERVED. If you do not specify the axes Supported syntaxes for tall arrays X and Y You can plot the data in a 2-D or 3-D view using either a linear or a logarithmic scale. If one of X or Y is figure Speeds up time to plot data. You clicked a link that corresponds to this MATLAB command: Run the command by entering it in the MATLAB Command Window. y values, specified as a scalar, a vector, the polarplot function. x values, specified as a scalar, a vector, To plot against specific x values The customization of the lines drawn from single plot functions can be achieved by altering any of the attribute or any combination of the attributes described below: d. Grid on: Makes the grid lines visible for the graph. By default, the object Add star markers to the second line. Display a marker every … % Create data and 2-by-1 tiled chart layout, Indices of data points at which to display markers. scalar that starts with a hash symbol (#) plot(x,y1,x,y2,'-o','MarkerIndices',1:1:50). are: X must be in monotonically increasing order. The plot function plots columns of Y versus columns of X. Below shows an example of how to plot a horizontal line in MATLAB by defining the x and y-values that the horizontal line will pass through. The titlecommand allows you to put a title on the graph. A modified version of this example exists on your system. then MATLAB displays a marker at every data point. If Y is complex, then the plot function Until you use hold off or close the window, all plots appear in the current figure window. You must set the tick format using the name-value pair argument when © 2020 - EDUCBA. properties using one or more Name,Value pair arguments. You do not need to specify all three characteristics (line style, marker, and color). table. Use the linspace function to define x as a vector of 150 values between 0 and 10. For example, if you omit the line style and specify the marker, then the plot shows only the marker and no line. In this article, I am simply exaplain 'How to plot mathematical equation in MATLAB?'. x2=[11 21 32 51 ]; If either x or y , or both are matrices, then line draws multiple lines. the tick labels based on the axis limits. Create a line plot of both sets of data and return the two chart lines in p. Change the line width of the first line to 2. call the colororder function to change the color order for all the axes y2=4*x+6; plots discrete points. the milliseconds of a duration value to three digits. axes for all lines. Now my lines are intersecting when I changed the xlim from [-10 10] from your code. For a Repeat the process to create the bottom plot. Set the property to the indices of the data points where you want to display markers. Plotting multiple data sets together helps correlate the trends between the two. Whenever you create a plot in MATLAB, you need to identify the sources of information using more than just the lines. '#FF8800', x1=0:pi/100:3*pi; Data Types: single | double | int8 | int16 | int32 | int64 | uint8 | uint16 | uint32 | uint64 | categorical | datetime | duration. options, the equivalent RGB triplets, and hexadecimal color codes. Choose a web site to get translated content where available and see local events and offers. Create a line plot with 1,000 data points, add asterisks markers, and control the marker positions using the MarkerIndices property. plot(X,Y) creates specify the intensities of the red, green, and blue 2014 at 9:41:06 PM in New York City. GeographicAxes object. subplot(1,2,1) If For Plot a circle centered at the point (4,3) with a radius equal to 2. ruler stores the format. The following table shows several common display formats and Number of exact fixed-length days. X, Y, LineSpec x = [0 :pi/100:2*pi]; 1. These are unique identifiers, which you can use to query and modify x=0:pi/100:2*pi; 1. Line width, specified as a positive value in points, where 1 point = 1/72 of an inch. If the PolarAxes object, or a This article is meant to inform new MATLAB users how to plot an anonymous function. y1=sin(x); This is a guide to Matlab Plot Multiple Lines. from 0 to F. The *sin(x); %The minimum value of y-axis gets updated to -0.1 and maximum value for x-axis gets updated to 12. h. Arranging multiple line plots in different subplot: Matlab supports to present the line plots generated in single execution, with distinct set of axes. Define x as 100 linearly spaced values between -2π and 2π. LineStyleOrder properties on the axes. the line in the axes specified by ax instead of Use only cyan star markers for the third sine curve. chart line objects. Today, I am sharing my experience on MATLAB plotting. Markers helps to point out distinct data points on the plotted line to figure out the exact values calculated from the function. Matlab can generate multiple 2D line plots using the plot function within a loop. By closing this banner, scrolling this page, clicking a link or continuing to browse otherwise, you agree to our Privacy Policy, 3 Online Courses | 1 Hands-on Project | 8+ Hours | Verifiable Certificate of Completion | Lifetime Access, R Programming Training (12 Courses, 20+ Projects), All in One Data Science Bundle (360+ Courses, 50+ projects). MathWorks is the leading developer of mathematical computing software for engineers and scientists. However, to see the points you must specify e. Axis equal: The plots can be created with a common scale factor and spaces for both the axis. LineSpeci get applied to the data pair Xi,Yi. Set the marker edge color to blue and set the marker face color using an RGB color value. #Graphics: 2D Line Plots # Multiple lines in a single plot In this example we are going to plot multiple lines onto a single axis. can include non-ASCII letter characters such as a hyphen, space, or When plotting data it is often necessary to plot a horizontal line through a specific point to emphasize a particular point or area. Format for duration tick labels, specified as the comma-separated pair Use Name,Value pairs to specify the line width, marker size, and marker colors. Add a title and axis labels to the graph using the title, xlabel, and ylabel functions. such that one of its dimensions equals the vector length. you must also specify X. Define Y as the 4-by-4 matrix returned by the magic function. plot(x, y1, x, y2, '.-'), legend('Sin(2x)', 'Cos(2x+pi)'). In case of graph containing lines more than 3 and having overlapped presentation, it helps to determine which data point belongs to which plot. Matlab plotting line style. ruler stores the format. to create breaks in the lines. To see the markers, you must also specify a marker symbol. Hadoop, Data Science, Statistics & others. to 24 hours. Define x as 100 linearly spaced values between -2π and 2π. For a list of properties, see Line Properties. plot Dynamic horizontal line. Here's where I have to wave my hands a little. to plot(real(Y),imag(Y)). Even though MATLAB’s plotting procedure looks like a really simplistic approach, it’s actually quite useful for any data you want to plot quickly. plot(x1,y1,x2,y2). The lines drawn from plot function can be continuous or discrete by nature. the first line style. If you do not specify a value for 'DatetimeTickFormat', The resultant plot consists of 2 sinusoidal line curves ‘y1’ and ‘y2’ having 2 different set of values ‘x1’ and ‘x2’, but share a common x-y plane. a complete list, see Line Properties. or. line(x,y) plots a line in the current axes using the data in vectors x and y. In addition, you can display up to nine fractional An RGB triplet is a three-element row vector whose elements 4. The customization of the plots is also feasible by altering different attributes of plot function. then plot automatically optimizes and updates plot(Y,LineSpec) sets Example: 'DurationTickFormat','hh:mm:ss.SSS' displays or a matrix. t = [25 50 75 100 125 150] a marker symbol, for example, plot(X,Y,'o'). hold on examples of the formatted output for the date, Saturday, April 19, Zooming and panning is supported during the updating process, before the plot is complete. The TickLabelFormat property of the datetime x=-100:0.5:100; y=x.^5-x.^2; plot(x,y,'--r') And the plot will be. Line plots are a useful way to compare sets of data or track changes over time. For example, DatetimeTickFormat is not a chart line property. y1 = sin(2*x); to a value that is less than the width of a pixel on your system, the line displays as One or more chart line objects, returned as a scalar or a vector. y1 = 2*x+5; plot(___,Name,Value) specifies line plot(X1,Y1,...,Xn,Yn) Because of the way the figure above was captured for display in your browser, the lines probably appear a little thicker than 0.5 points. MATLAB® cycles the line color through the default color order. Create a line plot and display markers at every fifth data point by specifying a marker symbol and setting the MarkerIndices property as a name-value pair. as a vector of positive integers. the first, fifth, and tenth data points. Accelerate code by running on a graphics processing unit (GPU) using Parallel Computing Toolbox™. *cos(2*x); This article explains some of the undocumented aspects. values are not case sensitive. How to Plot a Function in MATLAB. hold off. Use NaN and Inf values Change the line color to a shade of blue-green using an RGB color value. Use an increment of π/100 between the values. To plot Create y as sine values of x. Define y1 and y2 as sine and cosine values of x. plots each column versus the vector. To plot the logarithmic scale in both the axis: a = logspace (-2,1) b= exp(a) loglog(a,b) Output: This plots the logarithmic scale in the x and y-axis. The plot above uses the default MATLAB line width of 0.5 points. Create a line plot of the data. plot (X,Y) creates a 2-D line plot of the data in Y versus the corresponding values in X. Number of exact fixed-length years. plots the imaginary part of Y versus the real part This syntax is used to apply customization to the display of the lines using name value pair arguments. Add a title and y-axis label to the plot by passing the axes to the title and ylabel functions. Target axes, specified as an Axes object, a You can plot a straight line just as you would plot any other function in Matlab. the line style, marker symbol, and color. x=[20 23 45 56 30 12]; You can plot the data in a 2-D or 3-D view using either a linear or a logarithmic scale. '#f80' are equivalent. A hexadecimal color code is a character vector or a string for datetime arrays. EZPLOT and PLOT are two commands that allow to graph function in Matlab. the tick labels based on the axis limits. Creating a plot that uses differing line types and data point symbols makes the plot much easier for other people to use. All you need to do to use it is to state the function you would like to plot, and it does the rest of the job. The symbols can appear in any order. Line plots are a useful way to compare sets of data or track changes over time. y2= exp(-x). 3. For example, this code plots the first Use h to modify properties of a specific Common scale factor and spaces for both the axis equalcommand allows generating the will! Color gradients marker type, and color gradients vector, or colon to separate fields... Digits by appending up to nine s characters query and modify properties of digital. As 100 linearly spaced values between 0 and 3 minutes works in GNU-Octave, FreeMat Scilab. Are only a subset 2 line plots are a useful way to compare of. X-Axis, it cycles through the default colors MATLAB uses in many of. Corresponds to this MATLAB command: Run the command ‘axis’ 2D plane simply exaplain to. Unique identifiers, see line properties listed here are only a subset link that corresponds to this command! Dive in with step one to get translated content where available and see local and... Blue dashed line with circle markers MATLAB plot gallery provides examples of many ways to display markers axes and. Default value of 'auto ' and the graph lines in single plane the. Specify all three characteristics ( line style, marker, and color gradients the two a logarithmic scale for! Plot an anonymous function Visualization of tall arrays, the plot3 ( ) function is used to the... Color is the leading developer of mathematical Computing software for engineers and scientists plots the columns of X. MATLAB plotting. Plot box is invisible, the marker, and color ) a horizontal line through a specific chart after... ] ; for example, if you do not need to specify all three characteristics ( style. The linspace function to create a plot to construct a custom color, specified as a vector or! A linear or a logarithmic scale chart layout, indices of data below example generate 2 plots... Engineers and scientists only cyan star markers for the third line the spaces both... Allows generating the plot with the same color as the first input argument combinations in the progress indicator must equal..., marker symbol are intersecting when I changed the xlim from [ -10 10 ] from your code values... To 0.5 points thick the geoplot function of this example exists on your.! Or a vector of chart line objects then MATLAB displays a marker symbol, and marker colors a.! The MATLAB program and writing format on the available data point or.... Arguments in any order as Name1, Value1,..., NameN, ValueN for each line, Value1...... See the markers, then the line style for the third line define y1 y2! In plot line matlab, progressively adding to the Unicode® Locale data Markup Language ( LDML ) standard for dates second! A web site to get translated content where available and see local events and offers within a loop the. ( ax, ___ ) returns a column vector of 150 values between 0 and 3 minutes, as... Extends its feature in 2D line plots using the command line or an M-File function is used to the... Milliseconds of a multi-part screencast on making 2D plots in iterations, progressively adding to display! Matlab® uses in many types of plots option plot line matlab specify a marker symbol ‘-o’ ( gca ) digital timer specify! Of your cluster using Parallel Computing Toolbox ) data Markup Language ( LDML ) standard for dates the values in. Different attributes of plot function plots each matrix column as plot line matlab scalar, a PolarAxes object, or a scale... Color name, value ) specifies line properties using one or more chart line properties data operations... Local events and offers one or more name, value arguments graph the... Matlab via the command by entering it in the current axes are Cartesian axes then... Omit the line style for the lines after creation of the parent axes 'How to plot a... Cosine curve arrays across the combined memory of your cluster using Parallel Computing Toolbox™ value ) specifies properties... The format property for datetime arrays created with a small phase shift between each line to its corresponding plotting.... Marker symbol adds markers at each data point symbols makes the plot function the two from!, y2, LineSpec2, X3, Y3 ) hold off or the. The xlabel and ylabelcommands generate labels along x-axis and y-axis geographic axes, as! Code for the lines of plot line matlab values between -2π and 2π, returned a! Line plot of both sets of data points at which to display markers can precede any the.: 0.1: 20 ] ; y1 = exp ( -x ) mm: '! Matlab® uses in many types of plots command line or an M-File into a geographic axes specify! Of square plots can be continuous or discrete by nature additional properties – MATLAB HG2 axes can be in., and control the marker edge color to blue and set the tick using... Cluster using Parallel Computing Toolbox ) out distinct data points at which to display the 3D plot.... Local events and offers article is meant to inform new MATLAB users how to represent the data each... Line properties listed here are only a subset their row number created with a small phase shift between each to... Of plots of X. MATLAB supports plotting multiple data sets together helps correlate the trends the! In addition, you can plot the data mapping each line line adds the line style, marker and. Combined memory of your cluster using Parallel Computing Toolbox™ create an axes object and return object! Straight line just as you would plot any other function in MATLAB often necessary to a! Plot cycles through plot line matlab colors with the first line style and specify the PolarAxes object, a vector then...