how to get the min in an array and return its position?

I want to check the min in a matrix and return its position, Ex. x=[1 3 1 1], the code will check the min which is '1' and return its position (number of columns), Y=[1 3 4]

Any hint?

Answer 1

[Stephen23]

>> x = [1,3,1,1];
>> minval = min(x)
minval =  1
>> idx = find(x==minval)
idx =
   1   3   4

This kind of basic MATLAB usage is covered very well in the introductory tutorials:

http://www.mathworks.com/help/matlab/getting-started-with-matlab.html

[JacobM]

Great. what about if I just to return one minimum?

So in my example, I want the result to be Y=[1] which is the column position of first minimum,

[Stephen23]

 [minval,idx] = min(x)

Answer 2

[Star Strider]

For one (or the first) minimum, use the min function with two outputs:

x=[1 3 1 1];
[xmin,idx] = min(x)

xmin =
     1

idx =
     1

The first output is the value of the minimum, the second is the first occurrence of the minimum in the vector.