Find the under condition min or max of a row vector

Assume that you have a row vector a = [ 1 3 5 2 5 7 8 3 6 4 9 ] . I want to find in which colomn there is the min value of this vector but under condition that this min value is >= 3 . Can enyone help?

Answer 1

[KSSV]

a = [ 1 3 5 2 5 7 8 3 6 4 9 ] ;
a(a<3) = NaN ;  % Replace values <3 to NaN
[val,idx] = min(a)

[SOUGLES STAMATIS]

oh! Thank you.

[SOUGLES STAMATIS]

and also assume that the matrix a I get is a = [ NaN NaN NaN 3 4 6 4 8 5 NaN NaN NaN] how can i get the index value ( i mean in which column) of the bolt numbers (first and last between NaN)?

[KSSV]

a = a(~isnan(a)) ;
a(1)
a(end)

[SOUGLES STAMATIS]

that returns the actual values ( 3 and 5 ). I need the column number ( 4 and 9 in this case)

[KSSV]

find(~isnan(a),1,'first')
find(~isnan(a),1,'last')