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.

1. Given x = [3 1 5 7 9 2 6], explain what the following commands "mean" by summarizing the net result of the command.

a. x(3)

b. x(1:7)

c. x(1:end)

d. x(1:end-1)

e. x(6:-2:1)

f. x([1 6 2 1 1])

g. sum(x)