Pads or cuts a string with spaces to make it n characters long.

## Syntax

    output_string=pad(input_string,new_length,side)


## Arguments

  input_string - a character string

new_length   - pad with spaces or truncate to this length

side         - 'left' or 'right'


## Outputs

  output_string - the resulting character string


## Notes

Matlab has a similar function in an obscure toolbox, but users do not always have that toolbox installed.