Need help on a Matlab command? `help nameofcommand` will get you text-y help right there on the command line; `doc nameofcommand` will bring up the more graphical help browser. (You can also generally Google something like `Matlab nameofcommand` and get the Mathworks documentation in your web browser as well.)

Numeric output too short (not enough digits)? Use the `format` command (e.g. `format long g` will display numbers in a longer format; use `format short` to go back to the default shorter format with fewer digits)