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I converted double in CSV, but I need the comma at the end of each value

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Hello everybody!
I'm a begginer in Matlab but I need to know how to do somethings for a internship. I need to convert a double to a CSV file; I did it with "writematrix" and it works!
The problem is that I need to put this *.CSV in another software and it wants each value delimited with comma.
I want something like this:
But I have this:
Can someone help me? Thank you
I'll show you a part of the code where are the variables that I need:
%inizializziamo un vettore di soli zeri in cui raccoglieremo i valori in mV da salvare
sign1=zeros(size(P)); %P=P(:,1)
for k=1:length(P)
if P(k)==1
sign1(k)=signdata(k);
end
end
----------
writematrix(sign1,'myFile.CSV','Delimiter',','); %converto matrice in file CSV

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Star Strider
Star Strider 28 Oct 2020
If it absolutely must have commas, it is straightforward to make it happy:
x = rand(5,1);
fprintf('%.4f,\n', x)
producing (in this random run):
0.7577,
0.7431,
0.3922,
0.6555,
0.1712,
.

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