How do I create this scatter plot?

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Z 2013-7-24

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https://ww2.mathworks.cn/matlabcentral/answers/83064-how-do-i-create-this-scatter-plot

Hi guys, I have a really big matrix and I am trying to create a scatter plot out of two parameters. However, I want to make t customized based on the value of the number in the 11th column. I want my matrix, X, to have a normal scatter plot (e.g. parameters 1 and 2) and if the value in the 11th column is 1 for the row, it will be a + sign and if that value is zero, it will be plotted as a . sign

Also, the two parameters should already be distinguished by color. Here is a snippet that DOESN'T work:

X = mydata(:,1:10);
X (mydata (:,24) == 200,11) = 1;
hold on
gscatter(X(X(:,11)==1,1),X(X(:,11)==1,2),'b+','Markersize',13)
gscatter(X(X(:,11)==0,1),X(X(:,11)==0,2),'b.','Markersize',13)
gscatter(X(X(:,11)==1,1),X(X(:,11)==1,2),'g+','Markersize',13)
gscatter(X(X(:,11)==0,1),X(X(:,11)==0,2),'g.','Markersize',13)

Thanks!!

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Answer 1

dpb 2013-7-24

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https://ww2.mathworks.cn/matlabcentral/answers/83064-how-do-i-create-this-scatter-plot#answer_92680

在 MATLAB Online 中打开

gscatter(mydata(:,1),mydata(:,2),ordinal(X(:,11)),'bg','+.');
doc gscatter

Caution--air code but should be close. Order of color and/or symbols may not match desired, etc., ...

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Z 2013-7-24

Thanks! So I just realized the colors already distinguished the two. Thanks!

dpb 2013-7-24

Don't guess I follow the comment -- the ordinal variable should cause the color and markers to change accordingly as given in the vectors--so you should from the above get 'b+' and 'g.' for the two categories.

It's just that the input is expected to be a list of CLR,SYM properties, not mixed.

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