Define level of noise on data set

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Andreas
Andreas 2016-5-31
Hello world,
i have a data set of 10X9702 size, with ordinal values in the range of 1-5, where I add "noise" through this process:
for j=1:10
for i=1:length(A)
A(randi([1,10]),i)=randi([1,5]);
end
end
I was wondering whether there is a way that I can measure the "noise" of the whole data set, with a command such as snr, as I think that this one does not work for the nature of my data.
Best regards,
A.K

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