def write_char(self, arr, name):
arr = arr_to_chars(arr)
arr = arr_to_2d(arr, self.oned_as)
dims = arr.shape
self.write_header(name, dims, P=miUINT8, T=mxCHAR_CLASS)
if arr.dtype.kind == "U":
# Recode unicode to ascii
n_chars = np.product(dims)
st_arr = np.ndarray(shape=(), dtype=arr_dtype_number(arr, n_chars), buffer=arr)
st = st_arr.item().encode("ascii")
arr = np.ndarray(shape=dims, dtype="S1", buffer=st)
self.write_bytes(arr)
def write_char(self, arr, name):
arr = arr_to_chars(arr)
arr = arr_to_2d(arr, self.oned_as)
dims = arr.shape
self.write_header(name, dims, P=miUINT8, T=mxCHAR_CLASS)
if arr.dtype.kind == 'U':
# Recode unicode to ascii
n_chars = np.product(dims)
st_arr = np.ndarray(shape=(),
dtype=arr_dtype_number(arr, n_chars),
buffer=arr)
st = st_arr.item().encode('ascii')
arr = np.ndarray(shape=dims, dtype='S1', buffer=st)
self.write_bytes(arr)
def write_char(self, arr, codec='ascii'):
''' Write string array `arr` with given `codec`
'''
if arr.size == 0 or np.all(arr == ''):
# This an empty string array or a string array containing
# only empty strings. Matlab cannot distiguish between a
# string array that is empty, and a string array containing
# only empty strings, because it stores strings as arrays of
# char. There is no way of having an array of char that is
# not empty, but contains an empty string. We have to
# special-case the array-with-empty-strings because even
# empty strings have zero padding, which would otherwise
# appear in matlab as a string with a space.
shape = (0,) * np.max([arr.ndim, 2])
self.write_header(shape, mxCHAR_CLASS)
self.write_smalldata_element(arr, miUTF8, 0)
return
# non-empty string.
#
# Convert to char array
arr = arr_to_chars(arr)
# We have to write the shape directly, because we are going
# recode the characters, and the resulting stream of chars
# may have a different length
shape = arr.shape
self.write_header(shape, mxCHAR_CLASS)
if arr.dtype.kind == 'U' and arr.size:
# Make one long string from all the characters. We need to
# transpose here, because we're flattening the array, before
# we write the bytes. The bytes have to be written in
# Fortran order.
n_chars = np.product(shape)
st_arr = np.ndarray(shape=(),
dtype=arr_dtype_number(arr, n_chars),
buffer=arr.T.copy()) # Fortran order
# Recode with codec to give byte string
st = st_arr.item().encode(codec)
# Reconstruct as one-dimensional byte array
arr = np.ndarray(shape=(len(st),),
dtype='S1',
buffer=st)
self.write_element(arr, mdtype=miUTF8)
def write_char(self, arr, codec='ascii'):
''' Write string array `arr` with given `codec`
'''
if arr.size == 0 or np.all(arr == ''):
# This an empty string array or a string array containing
# only empty strings. Matlab cannot distiguish between a
# string array that is empty, and a string array containing
# only empty strings, because it stores strings as arrays of
# char. There is no way of having an array of char that is
# not empty, but contains an empty string. We have to
# special-case the array-with-empty-strings because even
# empty strings have zero padding, which would otherwise
# appear in matlab as a string with a space.
shape = (0,) * np.max([arr.ndim, 2])
self.write_header(shape, mxCHAR_CLASS)
self.write_smalldata_element(arr, miUTF8, 0)
return
# non-empty string.
#
# Convert to char array
arr = arr_to_chars(arr)
# We have to write the shape directly, because we are going
# recode the characters, and the resulting stream of chars
# may have a different length
shape = arr.shape
self.write_header(shape, mxCHAR_CLASS)
if arr.dtype.kind == 'U' and arr.size:
# Make one long string from all the characters. We need to
# transpose here, because we're flattening the array, before
# we write the bytes. The bytes have to be written in
# Fortran order.
n_chars = np.product(shape)
st_arr = np.ndarray(shape=(),
dtype=arr_dtype_number(arr, n_chars),
buffer=arr.T.copy()) # Fortran order
# Recode with codec to give byte string
st = st_arr.item().encode(codec)
# Reconstruct as one-dimensional byte array
arr = np.ndarray(shape=(len(st),),
dtype='S1',
buffer=st)
self.write_element(arr, mdtype=miUTF8)
def write_char(self, arr, codec='ascii'):
if arr.size == 0 or np.all(arr == ''):
# This an empty string array or a string array containing
# only empty strings. Matlab cannot distiguish between a
# string array that is empty, and a string array containing
# only empty strings, because it stores strings as arrays of
# char. There is no way of having an array of char that is
# not empty, but contains an empty string. We have to
# special-case the array-with-empty-strings because even
# empty strings have zero padding, which would otherwise
# appear in matlab as a string with a space.
shape = (0,) * np.max([arr.ndim, 2])
self.write_header(shape, mxCHAR_CLASS)
self.write_smalldata_element(arr, miUTF8, 0)
return
# non-empty string
arr = arr_to_chars(arr)
# We have to write the shape directly, because we are going
# recode the characters, and the resulting stream of chars
# may have a different length
shape = arr.shape
self.write_header(shape, mxCHAR_CLASS)
# We need to do our own transpose (not using the normal
# write routines that do this for us), and copy to make a nice C
# ordered thing
arr = arr.T.copy()
if arr.dtype.kind == 'U' and arr.size:
# Recode unicode using self.codec
n_chars = np.product(shape)
st_arr = np.ndarray(shape=(),
dtype=arr_dtype_number(arr, n_chars),
buffer=arr)
st = st_arr.item().encode(codec)
arr = np.ndarray(shape=(len(st),),
dtype='u1',
buffer=st)
self.write_element(arr, mdtype=miUTF8)
