How to plott multiple graphs with two Y-axes?

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R7 DR 2015-8-13

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https://ww2.mathworks.cn/matlabcentral/answers/233701-how-to-plott-multiple-graphs-with-two-y-axes

回答： alok dhaundiyal 2020-5-7

forMatlab.xlsx

在 MATLAB Online 中打开

Hi,

Please suggest me how to write the code to plott multiple graphs with two Y-axes.

I have data sets like this...

             X-axis data         X1=[.....]; X2=[.....]; X3=[....];
              First Y axis data  A1=[.....]; A2=[.....]; A3=[.....]; 
              second Y axis data B1=[.....]; B2=[.....]; B3=[.....];

This data produce totally six graphs, theree with Y axis one and three with Y axis two, please check the following image.

I am also attaching the excel file, please have a look.

Thanks

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Answer 1

Sebastian Castro 2015-8-13

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编辑：Sebastian Castro 2015-8-13

在 MATLAB Online 中打开

There is a "plotyy" function which lets you have two separate y-axes on the left and right sides:

http://www.mathworks.com/help/matlab/creating_plots/plotting-with-two-y-axes.html

Since you have 6 plots (3 on each axis, you should be able to concatenate them into columns. For example:

x = (1:10)';
y1 = rand(size(x));
y2 = rand(size(x));
y3 = rand(size(x));
y4 = 100*randn(size(x));
y5 = 100*randn(size(x));
y6 = 100*randn(size(x));
plotyy(x,[y1 y2 y3],x,[y4 y5 y6]);

- Sebastian

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Answer 2

R7 DR 2015-8-13

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Hi

I tried with your suggestion, but it is shwoing the error like ''Error using horzcat Dimensions of matrices being concatenated are not consistent.''

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Sebastian Castro 2015-8-13

Does your data have different x-coordinates too? The commands I shared with you assume that all of them share the same x data, and therefore also have the same number of elements in the y-axis.

You could use functions like "interp1" to interpolate the data such that they all use the same x vector and can be concatenated and plotted with plotyy. Otherwise, it may be a more involved solution...

- Sebastian

R7 DR 2015-8-13