You can also put multiple strings in the same box by making a cell array of the strings. Now let’s add a blue line before the text and a black box around the text and the line. For example, let’s plot a cosine wave and put some text on it with font size 18 and red color. You can also change the properties of the text like the font size using the FontSize property and the color using the Color property etc. If you give the coordinates which don’t lie on the plot, you won’t be able to see the text. Simply plot the variable and then select the coordinates from the plot and then use the text() function to place the text on the selected coordinates. You need to pass the x and y coordinate on which you want to place the text. We can also use the text() function to add text to the plot. Add Custom Legends Using the text() Function in MATLAB Check this link for more information about the legend() function. You can add as many legends as you want on a figure you just have to add more plots with undefined values on the same figure. In the above code, we added three legends on a cosine wave plot, and you can see they are not related to the plot. For example, let’s add custom legends to a cosine wave plot. You will not see the plots because their values are undefined, but you will see the legends. So to add custom legends that do not have any relation with the graph, you have to add more plots on the figure with undefined values, and then you can add more legends. If you try to add more than one legend using this function, MATLAB will give an error. But the problem is it only adds one legend on one plot.
The legend() function is used to add legends to a plot in MATLAB. Add Custom Legends Using the legend() Function in MATLAB
Matlab plot legend how to#
In this tutorial, we will discuss how to add custom legends to the plot using the legend() and text() function in MATLAB.
Matlab plot legend code#
The following table shows the colors and their codes − Code MATLAB provides eight basic color options for drawing graphs. MATLAB generates the following graph − Setting Colors on Graph The following example demonstrates the concept − Example The plot command can also be used with just one input vector. You can draw multiple graphs on the same plot. MATLAB can plot a 1 x n vector versus an n x 1 vector, or a 1 x n vector versus a 2 x n matrix (you will generate two lines), as long as n is the same for both vectors. MATLAB generates the following graph − Drawing Multiple Functions on the Same Graph The axis square command generates a square plot. The axis equal command allows generating the plot with the same scale factors and the spaces on both axes. The grid on command allows you to put the grid lines on the graph. The title command allows you to put a title on the graph. The xlabel and ylabel commands generate labels along x-axis and y-axis.
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. MATLAB draws a smoother graph − Adding Title, Labels, Grid Lines and Scaling on the Graph Please note that as we decrease the increment, the graph becomes smoother.Ĭhange the code file a little, reduce the increment to 5 − In this example, we will draw two graphs with the same function, but in second time, we will reduce the value of increment. Let us take one more example to plot the function y = x 2. When you run the file, MATLAB displays the following plot − Let us plot the simple function y = x for the range of values for x from 0 to 100, with an increment of 5.Ĭreate a script file and type the following code − To plot the graph of a function, you need to take the following steps −ĭefine x, by specifying the range of values for the variable x, for which the function is to be plottedįollowing example would demonstrate the concept.
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