Hi,I have numerical matrix 4X4, I have to classify numbers in grades like less than 20, greater than 20 and less than 20, so Hhow can I do it?

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Anup Badve
Anup Badve 2015-10-16
评论： Anup Badve 2015-10-16
I have numerical matrix 4X4, I have to classify numbers in grades like less than 20, greater than 20 and less than 20, so how can I do it?

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Thorsten
Thorsten 2015-10-16
X = randi(30, [4 4])
g20 = X(X > 20)
le20 = X(X <=20)

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Jack Breenlair
Jack Breenlair 2015-10-16
编辑：Jack Breenlair 2015-10-16
You want to use two for loops that go through the matrix checking if the numbers satisfy the conditions that you require.
auxiliar=0;
for i=1:4
for j=1:4
if A(i,j)==condition
auxiliar=auxiliar+1;
end
end
end
something like this
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