The following exercises are meant to be answered by few lines of MATLAB code; most of them could be expressed in a single line of code or command. The command may be involved (i.e., it may use a number of parentheses or calls to functions) but can, in essence, be solved by the execution of a single command. If the problem is too complicated, feel free to break it up over two or more lines and later to collapse it into a single line.

6. Give the following commands to create an array called F:

>> randn('seed',123456789)

>> F = randn(5,10);

a. Compute the mean of each column and assign the results to the elements of a vector called avg.

b. Compute the standard deviation of each column and assign the results to the elements of a vector called s.