Pad array

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Pads an array with zeroes in a similar way to padarray in MATLAB.

Other toolboxes required none
Function category Helper functions
This is a helper function that only exists to aid other functions in QETLAB. If you are an end-user of QETLAB, you likely will never have a reason to use this function.

pad_array is a function that takes an array and either prepends or postpends a number of zeroes specified by the function call.


  • BIN = pad_array(ARR, PAD_NUM, DIR)

Argument descriptions

  • ARR: The array which will have zeroes padded onto it.
  • PAD_NUM: The number of zeroes to either prepend or postpend onto ARR. This must be a non-negative integer.
  • DIR: An integer specifying whether to prepend or postpend the zeroes onto ARR. 0 means to prepend, 1 means to postpend, and any other number will throw an error.


A basic example of how pad_array works.

>> arr = [1,2,3,4];
>> pad_array(arr, 2, 0)

ans =

     0     0     1     2     3     4

>> pad_array(arr, 2, 1)

ans =

     1     2     3     4     0     0


This function is only meant to simplify code within other functions without the need to install the image processing package of MATLAB or Octave-Forge. Note that this function only pads with zeroes. If other numbers are required, please use the `padarray' function within the image processing toolbox of MATLAB or Octave-Forge.

Source code

Click here to view this function's source code on github.