Error in creating a volcano plot in MATLAB

Question

[c_u]

I am a complete newbie to MATLAB and the first task I have is to create a volcano plot. I have been using this link to understand about it and get started - https://www.mathworks.com/help/bioinfo/ref/mavolcanoplot.html

I tried to run it on dummy values -

a=[1 2 3]

b=[4.6 2.7 4.5]

c=[0.05 0.33 0.45]

And then I ran -

SigStructure = mavolcanoplot(a, b, c)

My understanding is that a represents the gene expression values for condition 1, b for condition 2, and c is the list of p-values for the 3 data points in a and b.

However running this code gives me the error -

Index exceeds matrix dimensions.

Error in mavolcanoplot (line 127)
appdata.effect = X(paramStruct.goodVals) - Y(paramStruct.goodVals);

Error in volc (line 4)
SigStructure = mavolcanoplot(a, b, c)

Can anyone explain where I am going wrong?

[Devon Ryan]

Hello chahatupretiiitk!

It appears that your post has been cross-posted to another site: https://bioinformatics.stackexchange.com/questions/2585/error-in-creating-a-volcano-plot-in-matlab

This is typically not recommended as it runs the risk of annoying people in both communities.

[c_u]

Thanks Devon for letting me know that this is not recommended. Will take care of it from now on