How to read sparse binary file WITHOUT matfile

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Erin
Erin on 16 Feb 2012
Commented: Oren on 19 Feb 2014
I am running 2011a and I need a work around for the "matfile" function, which is only included in 2011b and greater.
I have a sparse matrix A.mat. I want to be able to read in data from the matrix by specific indicies. In 2011b I would do:
matObjA = matfile('A.mat', 'Writable', true)
idx = 2304982; %some specific row index that I want to read
rowOfData = matObjA.A(idx, :);
Can I do this in 2011a using fopen, fseek, fread, or something else? The problem is that I personally don't know how to parse a binary data file that represents a sparse matrix.

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