How to apply a function to an specific column of all variables?
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Larissa Perez
le 17 Nov 2016
Commenté : Larissa Perez
le 18 Nov 2016
Hi everyone! I'm new to Matlab, so I'm sure this is a silly question.
I have about 20 variables, all same size matrix. I would like to turn all the values above 50 or below -50 in the first column into NaN, for all the variables. Can someone help me with that? This is what I have been trying to do:
myvars = who;
for i = 1:length(myvars)
data = eval(myvars{i});
shear = data(:,1);
shear(shear>50)=NaN;
shear(shear<-50)=NaN;
data(:,1) = shear;
eval(myvars{1}) = data;
end
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KSSV
le 17 Nov 2016
You have variables saved in workspace which are matrices and in there in first column you want nan? What problem you are facing now with the above code?
Réponse acceptée
James Tursa
le 17 Nov 2016
Modifié(e) : James Tursa
le 17 Nov 2016
Try this:
eval([myvars{i} ' = data']);
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Jan
le 17 Nov 2016
Don't do this. It is a bad programming style, because it impedes the debugging and performance. You find many discussions in this forum concerning eval, e.g. http://www.mathworks.com/matlabcentral/answers/194902-how-can-use-a-for-loop-to-name-a-matrix#answer_172980.
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