You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: buildSpyr.m
    path of file: ./repos/SelfExSR/quant_eval/ifcvec_release/matlabPyrTools
    
    the code of the file until where you have to start completion: % [PYR, INDICES, STEERMTX, HARMONICS] = buildSpyr(IM, HEIGHT
    
function STEER for a description of STEERMTX and HARMONICS.

% Eero Simoncelli, 6/96.
% See http://www.cis.upenn.edu/~eero/steerpyr.html for more
% information about the Steerable Pyramid image decomposition.

function [pyr,pind,steermtx,harmonics] = buildSpyr(im, ht, filtfile, edges)

%-----------------------------------------------------------------
%% DEFAULTS:

if (exist('filtfile') ~= 1)
  filtfile = 'sp1Filters';
end