Richard is Consulting Engineer at MathWorks focused on the Embedded Coder product for code generation, primarily in the Aerospace industry.

Richard 'sPick this week isadd_Data_TipsbyMassimo Ciacci.

Contents

Pick

My pick this week by the utility functionadd_Data_TipsTips for programmatically adding data to multiple lines in a plot.

If you write custom scripts/functions provides the to plot the data it is, beneficial to highlight specific points in the plot to the as minimums/maximums.DatatipsAllow you to show the values of the data at selected locations in the figure.

While you can add data tips to plot a manually, it is about the add data tips to multiple lines at the same location on the X axis.add_Data_TipsSolves this problem. Using add_Data_Tips, you can insert data tips on multiple lines in a plot at a specified X axis locations. For instance, if you want to call out the maximum value of a plot, you can use theMaxFunction to find the index of the maximum value of the Y - Axis data and specify the corresponding X Axis data in the call toadd_Data_TipsTo insert a data tip in the figure at the maximum point.

N = 0:50;Y = cos (. 5 * (n)). ^ 3 + sin (. 3 * (n)) ^ 2;Figure yh = plot (n, y);[~, indx] = Max (y);Add_DataTips (n (indx), yh, 7)

If you have a figure with multiple plots, and tips you can add the data to any or all of the lines at the same X Axis location by passing in the handles to the desired lines.

N = 0:50;Y = cos (. 5 * (n)). ^ 3 + sin (. 3 * (n)) ^ 2;Figure yh (1) = plot (n, y);holdonY2 = sin (1.5 x (n)). ^ 3 - cos (1.3 x (n)) ^ 2;Yh (2) = plot (n, y2);[~, indx] = Max (y);Add_DataTips (n (indx), yh, 7)

If you already have a plot, you can get the handles to the lines by accessing the Children of the axes

CurrentAxes = "gca";LinesHandles = CurrentAxes. Children;X_location = 10;Add_DataTips (x_location LinesHandles, 7)

You can use the examples above or the File Exchange submission includes a demo script, 'test_add_DataTips. M', that provides an example.

New in R2019b

If you have access to the most recent release, R2019b, you can now programmatically create datatips using the newdatatipThe function.

Figure yh = plot (n, y);[~, indx] = Max (y);The datatip (yh,'DataIndex', indx);

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Get the MATLAB code

Published with MATLAB ® R2019b

Published with MATLAB ® R2019b