% the following is a typical first attempt to read the binarytest_uchar
% file - it reads the data, but organises it wrongly. Remember that matlab
% address matrices column bu column. 
fd = fopen('binarytest_uchar.bin');
data = fread(fd,'uchar')
data =
     1
     1
     2
     4
     3
     9
     4
    16...etc...
% this reads in the data, but since no size is specified for the matrix
% 'data', it defaults to a single column. The data was written out from the
% array:
1    2     3     4     5     6     7     8     9    10
1    4     9    16    25    36    49    64    81   100
% in column order, ie: 1 1 2 4 3 9 4 16...etc, which is how it is read in
% above. To recover the shape of the required matrix we need to specify the
% size/shape of the desired output matrix:

data = fread(fd,[2 inf],'uchar')

% The 'count' variable [2 inf] instructs the fread function to put the data
% into a matrix that has 2 rows, and as many columns as required to hold
% all the data. We would now get
data =
1    2     3     4     5     6     7     8     9    10
1    4     9    16    25    36    49    64    81   100