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JuliaIO / MAT.jl

Julia module for reading MATLAB files
MIT License
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Can't write a BitArray to a MAT file #84

Closed RobBlackwell closed 4 years ago

RobBlackwell commented 6 years ago

Writing a BitArray doesn't work:

using MAT

A = trues(10,10)

matwrite("foo.mat", Dict("mask"=>A))

# ERROR: This is the write function for CompositeKind, but the input doesn't fit
# Stacktrace:
#  [1] m_write(::MAT.MAT_HDF5.MatlabHDF5File, ::HDF5.HDF5Group, ::String, ::Tuple{Int64,Int64}) at /home/reb/.julia/v0.6/MAT/src/MAT_HDF5.jl:514
#  [2] m_write(::MAT.MAT_HDF5.MatlabHDF5File, ::HDF5.HDF5File, ::String, ::Array{String,1}, ::Array{Any,1}) at /home/reb/.julia/v0.6/MAT/src/MAT_HDF5.jl:502
#  [3] m_write(::MAT.MAT_HDF5.MatlabHDF5File, ::HDF5.HDF5File, ::String, ::BitArray{2}) at /home/reb/.julia/v0.6/MAT/src/MAT_HDF5.jl:517
#  [4] write(::MAT.MAT_HDF5.MatlabHDF5File, ::String, ::BitArray{2}) at /home/reb/.julia/v0.6/MAT/src/MAT_HDF5.jl:530
#  [5] matwrite(::String, ::Dict{String,BitArray{2}}) at /home/reb/.julia/v0.6/MAT/src/MAT.jl:156

A workaround is to convert to an Array of Bool and this becomes a MATLAB logical array

matwrite("bar.mat", Dict("mask"=>convert(Array{Bool},A)))

It would be nice if the MAT.jl library handled this conversion automatically on write.