Note that this summary is just that, i.e. to be used for reference, and that the matlab_tutorial program is more useful to learn from. As a general rule, when you want to check the online documentation built into the MATLAB program, you can first check for any information that might be relevant by using the lookfor command (which is like the apropos command in UNIX). So for example, if you wish to find out about operators in MATLAB:
>> lookfor operator arith.m: %Arithmetic operators. relop.m: %Relational operators
tells you that typing
>> help arith.m
or
>> doc arith.m
will give detailed documentation on arithmetic operators.