MATLAB: How to find the first value coordinate(the minimum non-zero x coordinate) in each row

matrixminimum value

How to find the first value coordinate(the minimum non-zero x coordinate) in each row?
and what if each row value coordinate gap were to big how to smooth it ，connect each row to a smooth line? thanks
fclose all; close all; clear all; clf; clc;
A=[0,1,1;0,1,0;1,0,0];
[row,column]=find(A==min(min(1)));

Best Answer

If matrix just contains 0 and 1
[~,idx] = max(A, [], 2)
Result
>> idx
idx =
     2
     2
     1
For a general case
[~,idx] = max(A~=0, [], 2)
To smooth a signal use smoothdata(): https://www.mathworks.com/help/releases/R2020a/matlab/ref/smoothdata.html
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