Convert a proprietary .mat file to a more modern HDF5-compatible version 7 .mat file.

matlab_to_hdf5.jl

using MAT
using Lumberjack

@doc """
Using MAT.jl, converts any MATLAB version >=5 .mat file to an HDF5-compatible MATLAB version 7 .mat file.
Warns if the file already exists.
""" ->
function convert_to_matlab7(input_file:: AbstractString, output_file:: AbstractString)
    if ispath(output_file)
        warn("File $output_file already exists")
    else
        data = matread(input_file)
        matwrite(output_file, data)
    end
end