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r \S\S\ S\ S\ S\ SS/ SQSS0r \\\\\\\ \ \ \ \ S. r!Sr"Sr#S
r$SSSSS S .r%\"S \#S \$S 0r&\RN " \RP 5 RR r* " S! S"5 r+ " S# S$5 r, " S% S&\ 5 r-S,S' jr. " S( S)5 r/ " S* S+5 r0g)-z0Classes for read / write of matlab (TM) 4 files
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MatFileReader docfillermatdims
read_dtypeconvert_dtypes arr_to_charsarr_dtype_number)squeeze_elementchars_to_strings)reduce)MatFile4ReaderMatFile4WriterSYS_LITTLE_ENDIAN
VarHeader4
VarReader4
VarWriter4 arr_to_2d mclass_infomdtypes_templatemiDOUBLEmiINT16miINT32miSINGLEmiUINT16miUINT8 mxCHAR_CLASS mxFULL_CLASSmxSPARSE_CLASS np_to_mtypes order_codeslittle f8f4i4i2u2u1header))moptr* )mrowsr* )ncolsr* )imagfr* )namlenr* U1) r( c32c24c16r) c8r* r+ r, r- S1<>z VAX D-floatz VAX G-floatCray)r r r$ r% r& doublecharsparsec " \ rS rSrSrSrS rSrg)r Y Fc @ Xl X l X0l X@l XPl g N)namedtypemclassdims
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g )r k z!Class to read matlab 4 variables c Xl UR U l UR U l UR U l UR U l g rC ) file_reader
mat_streamdtypeschars_as_strings
squeeze_me)rI rY s rJ rK VarReader4.__init__n s= &%00!(( + < < %00rM c $ [ U R U R S 5 nU R R [ US 5 5 R S5 nUS S: d US S: a [
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UUU 5 $ )z$Read and return header for variable r. r3 r/ r z.Mat 4 mopt wrong format, byteswapping problem? )r r z!We do not support byte ordering 'z '; returned data may be corruptr% )
stackleveld z,O in MOPT integer should be 0, wrong format?
r0 r1 r2 r )
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ValueErrordivmodwarningswarnr" UserWarningr ) rI datarD MrestOPTrG rH rE s rJ read_headerVarReader4.read_headeru s& $//4;;x+@A##CX$78>>wG >%%c%6C''%'8E"*% %""3''rM c H U R U5 R [ R 5 nUR 5 R S5 n[ R " UR [ R " S5 [ R " U5 S9R 5 $ )zlatin-1 text matrix (char matrix) reader
Parameters
----------
hdr : ``VarHeader4`` instance
Returns
-------
arr : ndarray
with dtype 'U1', shape given by `hdr` ``dims``
latin-1r4 r rE r ) r astyper uint8tobytesr r rG rE arrayr )rI r| r~ Ss rJ ry VarReader4.read_char_array sm !!#&--bhh7 KKM +zz "!#!..2df 5rM c U R U5 nUSS2SS24 n[ US 5 [ US 5 4n[ R " USS2S4 SS9n[ R " USS2S4 SS9nUS- nUS- nUR S S :X a [ R " USS2S
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4 S S9nUSS2S 4 Ul [ R R XuU44U5 $ )
a Read and return sparse matrix type
Parameters
----------
hdr : ``VarHeader4`` instance
Returns
-------
arr : coo_array
with dtype ``float`` and shape read from the sparse array data
Notes
-----
MATLAB 4 real sparse arrays are saved in a N+1 by 3 array format, where
N is the number of non-zero values. Column 1 values [0:N] are the
(1-based) row indices of the each non-zero value, column 2 [0:N] are the
column indices, column 3 [0:N] are the (real) values. The last values
[-1,0:2] of the rows, column indices are shape[0] and shape[1]
respectively of the output matrix. The last value for the values column
is a padding 0. mrows and ncols values from the header give the shape of
the stored matrix, here [N+1, 3]. Complex data are saved as a 4 column
matrix, where the fourth column contains the imaginary component; the
last value is again 0. Complex sparse data do *not* have the header
``imagf`` field set to True; the fact that the data are complex is only
detectable because there are 4 storage columns.
N)r r )r r r intcrE r r% r$ floatcomplex) r rg r ascontiguousarrayr imagscipyr? coo_array)rI r| r tmprG IJVs rJ rz VarReader4.read_sparse_array s 6 !!##a%jCICI/ QqS 7 QqS 7 Q Q 99Q<1 $$S1XGA1XAF||%%qAi66rM c UR nU[ :X a% [ [ [ UR
5 5 nGOU[ :X a; [ [ [ UR
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n[ U5 S:X a US S: a US S: d gU R R UR US S-
- S5 [ R " SUU R R! UR 5 S9nU R R UR US S-
- S5 [ R " SUU R R! UR 5 S9n[ U5 [ U5 4nO[# SU 35 eU R$ ( a# [ U Vs/ s H oS:w d M
UPM sn5 nU$ s snf ) zgRead the shape of the array described by the header.
The file position after this call is unspecified.
Nr r$ r r rU r rw )rF r tuplemaprg rG r r\ r rE r rZ seekr r r rf r{ r] ) rI r| rF r r rG rowscolsxs rJ shape_from_header VarReader4.shape_from_header s \ !#c388,-E
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OO Q! ! [ TU ] " U/UQ70 UD6 SU l g)zEInitialize matlab 4 file reader
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N)superrK _matrix_reader)rI rZ argskwargs __class__s rJ rK MatFile4Reader.__init__> s$ 5d5f5 "rM c H U R R S5 [ U R [ R " S5 5 nU R R S5 US:X a gUS: d US: a [
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=( a S=( d S$ )Nr r* r: ra r; )rZ r r r rE r )rI r/ s rJ guess_byte_order MatFile4Reader.guess_byte_orderH su Q $//288D>: Q 19 !8td{$,3 3 (S/C/rM c b [ [ U R 5 U l [ U 5 U l g)zPRun when beginning read of variables
Sets up readers from parameters in `self`
N)r r
byte_orderr[ r r )rI s rJ initialize_read MatFile4Reader.initialize_readT s$
%%5tG ( .rM c P U R R 5 n[ [ UR [
R " UR R 5 5 nUR ( a UR [ :X d US- nU R R 5 U- nX4$ )a Read and return header, next position
Parameters
----------
None
Returns
-------
header : object
object that can be passed to self.read_var_array, and that
has attributes ``name`` and ``is_global``
next_position : int
position in stream of next variable
r$ )r rt r r rG r r rE r rH rF r rZ tell)rI r| remaining_bytes
next_positions rJ read_var_header MatFile4Reader.read_var_header\ sy !!--/ chh9K9K0LM >>#**"> q O ,,. @
!!rM c 8 U R R X5 $ )aD Read array, given `header`
Parameters
----------
header : header object
object with fields defining variable header
process : {True, False}, optional
If True, apply recursive post-processing during loading of array.
Returns
-------
arr : array
array with post-processing applied or not according to
`process`.
)r r )rI r. r} s rJ read_var_array MatFile4Reader.read_var_arrays s ""44VEErM c p [ U[ 5 ( a U/nOUb [ U5 nU R R S5 U R 5 0 nU R
5 ( d U R 5 u p4UR c SOUR R S5 nUb" XQ; a U R R U5 Mv U R U5 X%' U R R U5 Ub# UR U5 [ U5 S:X a U$ U R
5 ( d M U$ )zget variables from stream as dictionary
Parameters
----------
variable_names : None or str or sequence of str, optional
variable name, or sequence of variable names to get from Mat file /
file stream. If None, then get all variables in file.
r Noner )
isinstancestrlistrZ r r
end_of_streamr rD r r remover )rI variable_namesmdictr| r rD s rJ
get_variables MatFile4Reader.get_variables s nc * * , -N
' !. 1N Q $$&&!%!5!5!7 C XX -6388??83LD )d.H$$]3 --c2EK OO / ) %%d+~&!+ $$&& rM c U R R S5 U R 5 / nU R 5 ( d U R 5 u p#UR
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rZ r r r r rD r r r r getrF append)rI varsr| r rD r infos rJ list_variables MatFile4Reader.list_variables s Q $$&&!%!5!5!7 C XX -6388??83LD''99#>E ??3::y9D KKd+ , OO / $$&& rM )r r[ r rC )rN rO rP rQ r r rK r r r r r r rT
__classcell__)r s @rJ r r < s< !# #
0/".F$ > rM r c n [ X5 n[ U5 S: a [ S5 eU R U5 $ )a[ Make ``arr`` exactly two dimensional
If `arr` has more than 2 dimensions, raise a ValueError
Parameters
----------
arr : array
oned_as : {'row', 'column'}, optional
Whether to reshape 1-D vectors as row vectors or column vectors.
See documentation for ``matdims`` for more detail
Returns
-------
arr2d : array
2-D version of the array
r$ z=Matlab 4 files cannot save arrays with more than 2 dimensions)r r ri reshape)r~ oned_asrG s rJ r r s: " 3 D
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r i c H UR U l UR U l g rC file_streamr )rI file_writers rJ rK VarWriter4.__init__ s &22"** rM c T U R R UR SS95 g )Nr )r )r writer )rI r~ s rJ write_bytesVarWriter4.write_bytes s! s{{{ 56rM c : U R R U5 g rC )r r )rI ss rJ write_stringVarWriter4.write_string s q!rM r c > [ R " S[ S 5 n[ ( + nSnUS- US- - US- - U- US' US US' US US
' XVS ' [ U5 S - US ' U R U5 US
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U R S5 5 g)a Write header for given data options
Parameters
----------
name : str
name of variable
shape : sequence
Shape of array as it will be read in matlab
P : int, optional
code for mat4 data type, one of ``miDOUBLE, miSINGLE, miINT32,
miINT16, miUINT16, miUINT8``
T : int, optional
code for mat4 matrix class, one of ``mxFULL_CLASS, mxCHAR_CLASS,
mxSPARSE_CLASS``
imagf : int, optional
flag indicating complex
rU r. r rb rd re r/ r0 r r1 r2 r3 r N)r emptyr r r r r encode)
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d(c'"b&! v (w (w w t9q=x d{ $++h/0rM c 4 [ R R U5 ( a U R X5 g[ R
" U5 nUR nUR ( d UR UR S5 5 nUR nU[ R L a [ S5 eU[ R L a [ S5 eU[ R [ R 4; a U R! X5 gU R# X5 g)zWrite matrix `arr`, with name `name`
Parameters
----------
arr : array_like
array to write
name : str
name in matlab workspace
N=z!Cannot save object arrays in Mat4z Cannot save void type arrays)r r? issparse write_sparser asarrayrE isnativer newbyteordertypeobject_r{ voidstr_bytes_
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SS nU R UUR U[ US9 U( a7 U R UR 5 U R UR 5 g U R U5 g ! [ a3 U( a UR S5 nOUR S5 n[ n Nf = f)Ncr c128r( )rr rs r2 )r r rE kindr! r KeyErrorr r r r r r realr )rI r~ rD r2 rr s rJ r
VarWriter4.write_numeric s \\* #% SYY]]12 ./A
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XR 5 nUR nU R UU[ [ S9 UR R S:X aj [ R " U5 n[ R " S[! X5 US9nUR# 5 R% S5 n[ R " USUS9nU R' U5 g )Nr4 rr rs UrU r r r9 )rE r r r r r
r r r r r r r mathprodr r itemr r )rI r~ rD rG n_charsst_arrsts rJ r VarWriter4.write_char, s 99>>RWW $););rxx~?V?V)V s#C\\*yy
99>>S iioGZZb&6s&D'*,F %%i0B**4tB?C rM c P UR 5 nUR R S:H n[ R " UR
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ss' U( a; UR R USS2S 4' UR R USS2S4' OUR USS2S 4' UR USSS 24' U R UUR [ [ S
9 U R U5 g) zHSparse matrices are 2-D
See docstring for VarReader4.read_sparse_array
r r r% r( r Nr r r$ r )tocoorE r r zerosnnzrowcolrn r r r r r r r )rI r~ rD Ar2 ijvs rJ r VarWriter4.write_sparse@ s
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r r rT rU rM rJ r r s4 +7" +3l! 1B&:", ( rM r c , \ rS rSrSrSS jrSS jrSrg)r iY z(Class for writing matlab 4 format files Nc 4 Xl Uc SnX l S U l g )Nr" )r r _matrix_writer)rI r r s rJ rK MatFile4Writer.__init__[ s & ?G "rM c [ U 5 U l UR 5 H u p4U R R XC5 M" g)av Write variables in `mdict` to stream
Parameters
----------
mdict : mapping
mapping with method ``items`` return name, contents pairs
where ``name`` which will appeak in the matlab workspace in
file load, and ``contents`` is something writeable to a
matlab file, such as a NumPy array.
write_header : {None, True, False}
If True, then write the matlab file header before writing the
variables. If None (the default) then write the file header
if we are at position 0 in the stream. By setting False
here, and setting the stream position to the end of the file,
you can append variables to a matlab file
N)r r) itemsr )rI r r rD vars rJ
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