upper
Change lower case letters in a string to upper case.
S=upper(s)
Inputs
s A string or an array of strings.
Outputs
S An array of strings of the same size as the input. Each element of the output is a modification of the corresponding element of the input, with the lower case letters replaced by the corresponding upper case letters.


Example
>>c=upper({"usa","canada";"mexico","brazil"})
>>size(c)
          2          2

>>c[1,1]
USA
>>c[1,2]
CANADA
>>c[2,1]
MEXICO
>>c[2,2]
BRAZIL