How do I select the minimum value from the first column based on the corresponding value in the second column?

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Bhavishey Thapar
Bhavishey Thapar 2022-2-17
评论： Bhavishey Thapar 2022-2-17
I have data in two columns as shown below.
I want to find the minimum value in column one but the minimum function should only consider values in the 1st column, whose corresponding value in the 2nd column is a 0.
So in the above 8 rows the minimum value would be 3 since the minimum function would only look at 3,5,7,76.
How can achieve this?

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采纳的回答

KSSV
KSSV 2022-2-17
Ran in:
Let A be your data.
A = [1 1; 22 1; 3 0 ; 5 0; 60 1; 76 0; 7 0; 12 0] ;
iwant = min(A(A(:,2)==0,1))
iwant = 3

更多回答（1 个）

Sajid Afaque
Sajid Afaque 2022-2-17
编辑：Sajid Afaque 2022-2-17
use the below workaround
%variable
var = [[1;22;3;5;60;76;7;12] [1;1;0;0;1;0;0;1]];
%select only the portion which has second column entries as zeroes
var1 = var(find(var(:,2) == 0),:);
%now apply the min function
min_value = min(var1(:,1));
same in one line
%
min_value = min(var(find(var(:,2) == 0),1))

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