finding value less than a threshold

Hi, suppose I have a matrix A as follows:
A =
1 2 3
3 3 6
4 6 8
4 7 7
I need to find the number of values of matrix A having value less than 6.
How to do this?
Thanks in advance

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Walter Roberson
Walter Roberson 2011년 5월 9일

1 개 추천

sum(A(:)<6)

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Mohammad Golam Kibria
Mohammad Golam Kibria 2011년 5월 9일
this code gives the following output:
>> sum(A(:)<6)
ans =
7
but in the matrix values less than 6 are 1,2,3,3,3,4,4 ;
so the output should be 20;
code might not correct.would u pls check again.Thanks
RoJo
RoJo 2011년 5월 9일
>> sum(A(A<6))
ans =
20
Your original question is phrased wrong though for the answer you wanted. Should be 'sum of values of matrix A'
Walter Roberson
Walter Roberson 2011년 5월 9일
RoJo is correct. Your original question asked for the *number* of values, and that is what I answered. RoJo's code is good if you want the total of those values.

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