i have an array, named ersum which have 20000 columns (1*20000). i need to find minimum value of first 50 columns. next minimum value of next 50 columns and so on upto last 50 in that 20000 columns. please send suitable code. thank you sir.

if ersum(:,counter)<ersum(:,counter+1) minind(:,k)=counter; else minind(:,k)=counter+1; end

Answer 1

[Jos (10584)]

you can RESHAPE your vector into a 50-by-N array and then use MIN which can operate on all columns at once.

help reshape
help min

Hint: start with a small example, with e.g. 4 instead of 50, and 12 instead of 20000 values.