% Lab/Exercise 4 Solution

a) x = floor(rand(2,3)*10)

b) x.^2

c) x'

   [rows cols] = size(x)
   y = zeros(3,2);
   for ii=1:rows
     for jj=1:cols
        y(jj,ii)=x(ii,jj)
     end
   end

d) x([1 2],:) = x([2,1],:)

e) x(:,3) = x(2,[2 1])'

f) tmp = input('Enter a string: ','s');
   vals = ((tmp >= 'A') & (tmp <= 'Z'))  | ...
           ((tmp >= 'a') & (tmp <= 'z'))
   s = tmp(vals)