how to find non zero minimum
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hi, i have a [8200,1] matrix with zero and positive values. i need to find non zero minimum. please guide me if you can
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maryam
2014-10-4
25 个投票
2 个评论
Charanraj
2019-12-1
Ho to do this columnwise. For example, I have 200 columns and I need to find in each column the minimum non zero. Thanks
Selina KOLOKYTHA
2024-2-9
编辑：Selina KOLOKYTHA
2024-2-9
Hi! Here you go:
% if A is your matrix
C=200 % number of columns
for i=1:C % for each column i
B=A(:,i); % assign each column of A to B
m(i)=min(B(B>0)); % m returns the non zero minumum of each column i
end
Note that this only works if matrix A has zero to positive values - not if it has negative values.
更多回答（2 个）
Zoltán Csáti
2014-10-4
Lets suppose your matrix is called A. Then you first select those elements that are non-zero (i.e. positive) and after that use the min function:
min(A(A > 0))
Erick Medina
2017-11-28
1 个投票
Declare a temp_variable which is a copy of your target vector and delete all indexes equal to zero.
temp_vec = vec; temp_vec(temp_vec==0) = []; min(temp_vec)
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