MATLAB: How to find all uppercase letters in a string

countlogical?stringsuppercase

I have the following string:

str = 'I am an International student at the University of Lethbridge'

and I need to first find and count how many letters are uppercase, and second change them all to lowercase.

What Matlab help has pointed me in the direction of is:

a = count(str, upper(str))

Which gave me one single zero. So I also tried:

TF = isstrprop(str,upper)

Which is giving me the error "Not enough input arguments"

What am I doing wrong and how can I fix this?

Thanks!

str = 'I am an International student at the University of Lethbridge' ;
idx = isstrprop(str,'upper') ;
str(idx) = lower(str(idx))

How about using regexp to find the position of spaces, and delete 2nd~Nth spaces? Like:

mystring = 'this is my string';
pos = regexp(mystring,'\s');
mystring(pos(2:end)) = [];

regexp(a,'^[^a-z]+$','match')