def rgrd(self, dataIn, missingValueIn, missingMatch, logYes = 'yes', positionIn = None, maskIn = None, missingValueOut = None):
""" #---------------------------------------------------------------------------------
#
# PURPOSE: To perform all the tasks required to regrid the input data, dataIn, into the ouput data, dataout in
# the latitude-level plane.
#
# DEFINITION:
#
# def rgrd(self, dataIn, missingValueIn, missingMatch, positionIn = None, maskIn = None,
# missingValueOut = None):
#
#
# PASSED : dataIn -- data to regrid
#
# missingValueIn -- the missing data value to use in setting missing in the mask. It is required
# and there are two choices:
# None -- there is no missing data
# A number -- the value to use in the search for possible missing data.
# The presence of missing data at a grid point leads to recording 0.0 in the mask.
#
# missingMatch -- the comparison scheme used in searching for missing data in dataIn using the value passed
# in as missingValueIn. The choices are:
# None -- used if None is the entry for missingValueIn
# exact -- used if missingValue is the exact value from the file
# greater -- the missing data value is equal to or greater than missingValueIn
# less -- the missing data value is equal to or less than missingValueIn
#
# logYes -- choose the level regrid as linear in log of level or linear in level. Set to
# 'yes' for log. Anything else is linear in level.
#
#
# positionIn -- a tuple with the numerical position of the dimensions
# in C or Python order specified in the sequence latitude,
# level and time. Latitude and level are required. If time is missing submit None in its
# slot in the tuple. Notice that the length of the tuple is
# always three.
#
# Explicitly, in terms of the shape of dataIn as returned by python's shape function
#
# positionIn[0] contains the position of latitude in dataIn
# positionIn[1] contains the position of level in dataIn or None
# positionIn[2] contains the position of time in dataIn or None
#
# As examples:
# If the c order shape of 3D data is
# (number of times, number of levels, number of latitudes)
# submit
# (2, 1, 0).
#
# If the c order shape of 2D data is
# (number of times, number of latitudes)
# submit
# (1, None, 0).
#
# Send in None if the shape is a subset of (time, level, latitude) which is evaluated
# as follows:
# 2D -- code assumes (1,0,None)
# 3D -- code assumes (2,1,0)
#
# maskIn -- an array of 1.0 and 0.0 values where the 0.0 value is used to mask the input data. This
# mask only works on the latitude grid. It is not possible to mask out a region in the level
# plane. The 0.0 value removes the data from correponding grid point. The user can supply the
# following choices:
#
# None -- an array of 1.0s is created followed by substituting 0.0s for grid points with missing
# data in the input data array, dataIn
#
# array -- an array of 1.0s or 0.0s which must be either 2D or the actual size of the input data,
# dataIn. This user supplied mask might be used to mask a latitude region. It is not
# required to account for missing data in the input data. The code uses missingValueIn
# and missingMatch to supply the 0.0s for grid points with missing data in the input
# data array, dataIn.
#
#
# missingValueOut -- the value for the missing data used in writing the output data. If left at the
# default entry, None, the code uses missingValueIn if present or as a last resort
# 1.0e20
#
#
# RETURNED : dataOut -- the regridded data
#
#
# USAGE:
#
# Example 1. To regrid dataIn into dataOut using all the defaults where None, None signifies no
# missing data.
# dataOut = x.rgrd(dataIn, None, None)
#
# Example 2. To regrid dataIn into dataOut using 1.0e20 and greater as the missing data
#
# dataOut = x.rgrd(dataIn, 1.e20, 'greater')
#
# WARNING: This code does not regrid cross sections which have a single dummy longitude value!
#
#
#---------------------------------------------------------------------------------------------------------------------"""
# check the required input -- dataIn, missingValueIn and missingMatch
# make sure that dataIn is an array
try:
z = len(dataIn)
except TypeError:
sendmsg('Error in calling the rgrd method -- dataIn must be an array')
raise TypeError
# try to identify a single dummy longitude
dataShape = dataIn.shape
if len(dataShape) > 3:
msg = 'Error in call to rgrd -- cross section data can not have more than 3 dimensions'
sendmsg(msg)
raise TypeError
if positionIn != None:
if self.nlati != (dataShape[ positionIn[0] ]):
msg = 'Latitude vector is inconsistent with input data'
sendmsg(msg)
raise ValueError
if self.nlevi != (dataShape[ positionIn[1] ]):
msg = 'Level vector is inconsistent with input data'
sendmsg(msg)
raise ValueError
# check the missingValueIn pass
if missingValueIn != None:
try:
z = abs(missingValueIn)
except TypeError:
sendmsg('Error in calling the rgrd method -- missingvalueIn must be None or a number. Now it is ', missingValueIn)
raise TypeError
# check the missingMatch pass
missingPossibilities = ['greater', 'equal', 'less', None]
if missingMatch not in missingPossibilities:
msg = 'Error in missingMatch -- it must be None or the string greater, equal, or less. Now it is '
sendmsg(msg, missingMatch)
raise ValueError
# set missing value to be used in dataOut
if missingValueOut == None:
if missingValueIn != None:
omit = missingValueIn # default
else:
omit = 1.0e20 # default
else:
omit = missingValueOut # user choice
# --- Check data type and change to float if necessary ----
if dataIn.dtype.char != 'f':
dataIn = dataIn.astype(numpy.float32)
# produce the input for rgdlength not generated by maplength
dataShape = dataIn.shape
numberDim = len(dataShape)
if numberDim < 2:
msg = 'Error in call to rgrd -- data must have at least 2 dimensions'
sendmsg(msg)
raise TypeError
if positionIn == None: # construct the default positionIn tuple
positionList =[]
for n in range(numberDim): # insert a sequence of numbers
positionList.append(n)
positionList.reverse()
if numberDim == 2: # fill end of list with a None
positionList.append(None)
positionIn = tuple(positionList)
if len(positionIn) != 3:
msg = 'Error in call to rgrd -- positionIn must be a tuple of length 3'
sendmsg(msg)
raise TypeError
# set ilon, ilat in Fortran order except that the first index is 0 - not 1
ilat = numberDim - 1 - positionIn[0]
itim1 = itim2 = -1
ntim1 = ntim2 = 0
if numberDim == 2: # lat and level field
itim1 = numberDim - 1 - positionIn[1]
ntim1 = dataShape[ positionIn[1] ]
if numberDim == 3: # lon_lat field + level + time
itim1 = numberDim -1 - positionIn[1]
ntim1 = dataShape[ positionIn[1] ]
itim2 = numberDim -1 - positionIn[2]
ntim2 = dataShape[ positionIn[2] ]
# check for consistency between the grid axiss and the dataIn shape
if self.nlati != (dataShape[ positionIn[0] ]):
msg = 'Latitude vector is inconsistent with input data'
sendmsg(msg)
raise ValueError
if self.nlevi != (dataShape[ positionIn[1] ]):
msg = 'Level vector is inconsistent with input data'
sendmsg(msg)
raise ValueError
# allocate memory for aout -- the array with original number of levels but the new number of latitudes
aoutList = list(dataIn.shape)
aoutList[ positionIn[0] ] = self.nlato
aout = numpy.zeros(tuple(aoutList), numpy.float32) # memory for aout
# generate the mask
amskin = sectionmask(dataIn, positionIn, maskIn, missingValueIn, missingMatch)
# ------------- call rgdlength to regrid latitude -----------------------
amskout = _regrid.rgdlength(ilat, itim1, itim2, ntim1, ntim2, self.nlati, self.nlato, omit, self.latdx, self.latpt, self.wtlat, amskin, dataIn, aout)
# ------------- call rgdpressure to regrid pressure -----------------------
# allocate memory for ap -- the array with new number of levels and the new number of latitudes
apList = list(dataIn.shape)
apList[ positionIn[0] ] = self.nlato
apList[ positionIn[1] ] = self.nlevo
ap = numpy.zeros(tuple(apList), numpy.float32) # memory for ap
nlon = 0
if missingMatch == None: # if no missing do not pass None
missingMatch = 'none'
if missingValueIn == None: # if no missing do not pass None
missingValueIn = 1.333e33
if logYes != 'yes':
logYes = 'no'
levIn = self.levIn[:].astype(numpy.float64)
levOut = self.levOut[:].astype(numpy.float64)
_regrid.rgdpressure(self.nlevi, self.nlevo, self.nlato, nlon, ntim2, missingValueIn, missingMatch, logYes, levIn, levOut, aout, ap)
if missingMatch == 'none': # if no missing do not pass None
missingMatch = None
if missingValueIn == 1.333e33:
missingValueIn = None
return ap
def rgrd(self,
dataIn,
missingValueIn,
missingMatch,
logYes='yes',
positionIn=None,
maskIn=None,
missingValueOut=None):
""" #---------------------------------------------------------------------------------
#
# PURPOSE: To perform all the tasks required to regrid the input data, dataIn, into the ouput data, dataout in
# the latitude-level plane.
#
# DEFINITION:
#
# def rgrd(self, dataIn, missingValueIn, missingMatch, positionIn = None, maskIn = None,
# missingValueOut = None):
#
#
# PASSED : dataIn -- data to regrid
#
# missingValueIn -- the missing data value to use in setting missing in the mask. It is required
# and there are two choices:
# None -- there is no missing data
# A number -- the value to use in the search for possible missing data.
# The presence of missing data at a grid point leads to recording 0.0 in the mask.
#
# missingMatch -- the comparison scheme used in searching for missing data in dataIn using the value passed
# in as missingValueIn. The choices are:
# None -- used if None is the entry for missingValueIn
# exact -- used if missingValue is the exact value from the file
# greater -- the missing data value is equal to or greater than missingValueIn
# less -- the missing data value is equal to or less than missingValueIn
#
# logYes -- choose the level regrid as linear in log of level or linear in level. Set to
# 'yes' for log. Anything else is linear in level.
#
#
# positionIn -- a tuple with the numerical position of the dimensions
# in C or Python order specified in the sequence latitude,
# level and time. Latitude and level are required. If time is missing submit None in its
# slot in the tuple. Notice that the length of the tuple is
# always three.
#
# Explicitly, in terms of the shape of dataIn as returned by python's shape function
#
# positionIn[0] contains the position of latitude in dataIn
# positionIn[1] contains the position of level in dataIn or None
# positionIn[2] contains the position of time in dataIn or None
#
# As examples:
# If the c order shape of 3D data is
# (number of times, number of levels, number of latitudes)
# submit
# (2, 1, 0).
#
# If the c order shape of 2D data is
# (number of times, number of latitudes)
# submit
# (1, None, 0).
#
# Send in None if the shape is a subset of (time, level, latitude) which is evaluated
# as follows:
# 2D -- code assumes (1,0,None)
# 3D -- code assumes (2,1,0)
#
# maskIn -- an array of 1.0 and 0.0 values where the 0.0 value is used to mask the input data. This
# mask only works on the latitude grid. It is not possible to mask out a region in the level
# plane. The 0.0 value removes the data from correponding grid point. The user can supply the
# following choices:
#
# None -- an array of 1.0s is created followed by substituting 0.0s for grid points with missing
# data in the input data array, dataIn
#
# array -- an array of 1.0s or 0.0s which must be either 2D or the actual size of the input data,
# dataIn. This user supplied mask might be used to mask a latitude region. It is not
# required to account for missing data in the input data. The code uses missingValueIn
# and missingMatch to supply the 0.0s for grid points with missing data in the input
# data array, dataIn.
#
#
# missingValueOut -- the value for the missing data used in writing the output data. If left at the
# default entry, None, the code uses missingValueIn if present or as a last resort
# 1.0e20
#
#
# RETURNED : dataOut -- the regridded data
#
#
# USAGE:
#
# Example 1. To regrid dataIn into dataOut using all the defaults where None, None signifies no
# missing data.
# dataOut = x.rgrd(dataIn, None, None)
#
# Example 2. To regrid dataIn into dataOut using 1.0e20 and greater as the missing data
#
# dataOut = x.rgrd(dataIn, 1.e20, 'greater')
#
# WARNING: This code does not regrid cross sections which have a single dummy longitude value!
#
#
#---------------------------------------------------------------------------------------------------------------------"""
# check the required input -- dataIn, missingValueIn and missingMatch
# make sure that dataIn is an array
try:
z = len(dataIn)
except TypeError:
sendmsg(
'Error in calling the rgrd method -- dataIn must be an array')
raise TypeError
# try to identify a single dummy longitude
dataShape = dataIn.shape
if len(dataShape) > 3:
msg = 'Error in call to rgrd -- cross section data can not have more than 3 dimensions'
sendmsg(msg)
raise TypeError
if positionIn != None:
if self.nlati != (dataShape[positionIn[0]]):
msg = 'Latitude vector is inconsistent with input data'
sendmsg(msg)
raise ValueError
if self.nlevi != (dataShape[positionIn[1]]):
msg = 'Level vector is inconsistent with input data'
sendmsg(msg)
raise ValueError
# check the missingValueIn pass
if missingValueIn != None:
try:
z = abs(missingValueIn)
except TypeError:
sendmsg(
'Error in calling the rgrd method -- missingvalueIn must be None or a number. Now it is ',
missingValueIn)
raise TypeError
# check the missingMatch pass
missingPossibilities = ['greater', 'equal', 'less', None]
if missingMatch not in missingPossibilities:
msg = 'Error in missingMatch -- it must be None or the string greater, equal, or less. Now it is '
sendmsg(msg, missingMatch)
raise ValueError
# set missing value to be used in dataOut
if missingValueOut == None:
if missingValueIn != None:
omit = missingValueIn # default
else:
omit = 1.0e20 # default
else:
omit = missingValueOut # user choice
# --- Check data type and change to float if necessary ----
if dataIn.dtype.char != 'f':
dataIn = dataIn.astype(numpy.float32)
# produce the input for rgdlength not generated by maplength
dataShape = dataIn.shape
numberDim = len(dataShape)
if numberDim < 2:
msg = 'Error in call to rgrd -- data must have at least 2 dimensions'
sendmsg(msg)
raise TypeError
if positionIn == None: # construct the default positionIn tuple
positionList = []
for n in range(numberDim): # insert a sequence of numbers
positionList.append(n)
positionList.reverse()
if numberDim == 2: # fill end of list with a None
positionList.append(None)
positionIn = tuple(positionList)
if len(positionIn) != 3:
msg = 'Error in call to rgrd -- positionIn must be a tuple of length 3'
sendmsg(msg)
raise TypeError
# set ilon, ilat in Fortran order except that the first index is 0 - not 1
ilat = numberDim - 1 - positionIn[0]
itim1 = itim2 = -1
ntim1 = ntim2 = 0
if numberDim == 2: # lat and level field
itim1 = numberDim - 1 - positionIn[1]
ntim1 = dataShape[positionIn[1]]
if numberDim == 3: # lon_lat field + level + time
itim1 = numberDim - 1 - positionIn[1]
ntim1 = dataShape[positionIn[1]]
itim2 = numberDim - 1 - positionIn[2]
ntim2 = dataShape[positionIn[2]]
# check for consistency between the grid axiss and the dataIn shape
if self.nlati != (dataShape[positionIn[0]]):
msg = 'Latitude vector is inconsistent with input data'
sendmsg(msg)
raise ValueError
if self.nlevi != (dataShape[positionIn[1]]):
msg = 'Level vector is inconsistent with input data'
sendmsg(msg)
raise ValueError
# allocate memory for aout -- the array with original number of levels but the new number of latitudes
aoutList = list(dataIn.shape)
aoutList[positionIn[0]] = self.nlato
aout = numpy.zeros(tuple(aoutList), numpy.float32) # memory for aout
# generate the mask
amskin = sectionmask(dataIn, positionIn, maskIn, missingValueIn,
missingMatch)
# ------------- call rgdlength to regrid latitude -----------------------
amskout = _regrid.rgdlength(ilat, itim1, itim2, ntim1, ntim2,
self.nlati, self.nlato, omit, self.latdx,
self.latpt, self.wtlat, amskin, dataIn,
aout)
# ------------- call rgdpressure to regrid pressure -----------------------
# allocate memory for ap -- the array with new number of levels and the new number of latitudes
apList = list(dataIn.shape)
apList[positionIn[0]] = self.nlato
apList[positionIn[1]] = self.nlevo
ap = numpy.zeros(tuple(apList), numpy.float32) # memory for ap
nlon = 0
if missingMatch == None: # if no missing do not pass None
missingMatch = 'none'
if missingValueIn == None: # if no missing do not pass None
missingValueIn = 1.333e33
if logYes != 'yes':
logYes = 'no'
levIn = self.levIn[:].astype(numpy.float64)
levOut = self.levOut[:].astype(numpy.float64)
_regrid.rgdpressure(self.nlevi, self.nlevo, self.nlato, nlon, ntim2,
missingValueIn, missingMatch, logYes, levIn,
levOut, aout, ap)
if missingMatch == 'none': # if no missing do not pass None
missingMatch = None
if missingValueIn == 1.333e33:
missingValueIn = None
return ap
def rgrd(self, dataIn, missingValueIn, missingMatch, logYes = 'yes', positionIn = None, missingValueOut = None):
""" #---------------------------------------------------------------------------------
#
# PURPOSE: To perform all the tasks required to regrid the input data, dataIn, into the ouput data,
# dataout along the level dimension only.
#
# DEFINITION:
#
# def rgrd(self, dataIn, missingValueIn, missingMatch, positionIn = None, missingValueOut = None):
#
#
# PASSED : dataIn -- data to regrid
#
# missingValueIn -- the missing data value to use in setting missing in the mask. It is required
# and there are two choices:
# None -- there is no missing data
# A number -- the value to use in the search for possible missing data.
# The presence of missing data at a grid point leads to recording 0.0 in the mask.
#
# missingMatch -- the comparison scheme used in searching for missing data in dataIn using the value passed
# in as missingValueIn. The choices are:
# None -- used if None is the entry for missingValueIn
# exact -- used if missingValue is the exact value from the file
# greater -- the missing data value is equal to or greater than missingValueIn
# less -- the missing data value is equal to or less than missingValueIn
#
# logYes -- choose the level regrid as linear in log of level or linear in level. Set to
# 'yes' for log. Anything else is linear in level.
#
#
#
# positionIn -- a tuple with the numerical position of the dimensions
# in C or Python order specified in the sequence longitude,
# latitude, level and time. Longitude, latitude and level are
# required. If time is missing submit None in its slot in the
# tuple. Notice that the length of the tuple is always four.
#
# Explicitly, in terms of the shape of dataIn as returned by Python's shape function
#
# positionIn[0] contains the position of longitude in dataIn
# positionIn[1] contains the position of latitude in dataIn
# positionIn[2] contains the position of level in dataIn or None
# positionIn[3] contains the position of time in dataIn or None
#
# As examples:
# If the C order shape of 4D data is
# (number of longitudes, number of times, number of levels, number of latitudes)
# submit
# (0, 3, 2, 1)
#
# If the C order shape of 3D data is
# (number of longitudes, number of times, number oflatitudes)
# submit
# (0, 2, 1, None)
#
# Send in None if the shape is a subset of (time, level,
# latitude, longitude) which is evaluated as follows:
# 3D -- code assumes (2,1,0,None)
# 4D -- code assumes (3,2,1,0)
#
# missingValueOut -- the value for the missing data used in writing the output data. If left at the
# default entry, None, the code uses missingValueIn if present or as a last resort
# 1.0e20
#
#
# RETURNED : dataOut -- the regridded data
#
#
# USAGE:
#
# Example 1. To regrid dataIn into dataOut using all the defaults where None, None signifies no
# missing data.
# dataOut = x.rgrd(dataIn, None, None)
#
# Example 2. To regrid dataIn into dataOut using 1.0e20 and greater as the missing data
#
# dataOut = x.rgrd(dataIn, 1.e20, 'greater')
#
#---------------------------------------------------------------------------------------------------------------------"""
# check the required input -- dataIn, missingValueIn and missingMatch
# make sure that dataIn is an array
try:
z = len(dataIn)
except TypeError:
sendmsg('Error in calling the rgrd method -- dataIn must be an array')
raise TypeError
# check the missingValueIn pass
if missingValueIn != None:
try:
z = abs(missingValueIn)
except TypeError:
sendmsg('Error in calling the rgrd method -- missingvalueIn must be None or a number. Now it is ', missingValueIn)
raise TypeError
# check the missingMatch pass
missingPossibilities = ['greater', 'equal', 'less', None]
if missingMatch not in missingPossibilities:
msg = 'Error in missingMatch -- it must be None or the string greater, equal, or less. Now it is '
sendmsg(msg, missingMatch)
raise ValueError
# --- Check data type and change to float if necessary ----
if dataIn.dtype.char != 'f':
dataIn = dataIn.astype(numpy.float32)
dataShape = dataIn.shape
numberDim = len(dataShape)
if numberDim < 2:
msg = 'Error in call to rgrd -- data must have at least 2 dimensions'
sendmsg(msg)
raise TypeError
# --- evaluate positionIn ----
# --- make standard positionIn as a check----
positionList =[]
for n in range(numberDim): # insert a sequence of numbers
positionList.append(n)
positionList.reverse()
for n in range(numberDim, 4): # fill end of list with Nones
positionList.append(None)
positionCheck = tuple(positionList)
standardPosition = 0 # transpose required
if positionIn == None: # construct the default positionIn tuple
positionIn = positionCheck
standardPosition = 1 # no need for a transpose with this data
else:
if positionIn == positionCheck: # compare to the standard
standardPosition = 1 # no need for a transpose with this data
if len(positionIn) != 4:
msg = 'Error in call to rgrd -- positionIn must be a tuple of length 4'
sendmsg(msg)
raise TypeError
if standardPosition == 0: # transpose data to the standard order (t,z,y,x)
newOrder, inverseOrder = checkorder(positionIn)
dataIn = numpy.transpose(dataIn, newOrder) # transpose data to standard order (t,z,y,x)
dataIn = numpy.array(dataIn.astype(numpy.float32), numpy.float32) # make contiguous
# set dimension sizes and check for consistency
if positionIn[0] != None:
self.nlon = (dataShape[ positionIn[0] ])
else:
self.nlon = 0
if positionIn[1] != None:
self.nlat = (dataShape[ positionIn[1] ])
else:
self.nlat = 0
if positionIn[2] != None:
if self.nlevi != (dataShape[ positionIn[2] ]):
msg = 'Level size is inconsistent with input data'
sendmsg(msg)
raise ValueError
if positionIn[3] != None:
self.ntime = (dataShape[ positionIn[3] ])
else:
self.ntime = 0
# allocate memory for dataOut -- the array with new number of levels
outList = list(dataIn.shape)
for i in range(len(outList)):
if outList[i] == self.nlevi:
outList[i] = self.nlevo
break
dataOut = numpy.zeros(tuple(outList), numpy.float32) # memory for aout
if missingMatch == None: # if no missing do not pass None
missingMatch = 'none'
if missingValueIn == None: # if no missing do not pass None
missingValueIn = 1.333e33
if logYes != 'yes':
logYes = 'no'
levIn = self.axisIn[:].astype(numpy.float64)
levOut = self.axisOut[:].astype(numpy.float64)
_regrid.rgdpressure(self.nlevi, self.nlevo, self.nlat, self.nlon, self.ntime, missingValueIn, missingMatch, logYes, levIn, levOut, dataIn, dataOut)
if missingMatch == 'none': # if no missing do not pass None
missingMatch = None
if missingValueIn == 1.333e33:
missingValueIn = None
if standardPosition == 0:
dataOut = numpy.transpose(dataOut, inverseOrder) # transpose data to original order
dataOut = numpy.array(dataOut.astype(numpy.float32), numpy.float32) # make contiguous
if missingValueOut != None: # set the missing value in data to missingValueOut
if missingMatch == 'greater':
if missingValueIn > 0.0:
missing = 0.99*missingValueIn
else:
missing = 1.01*missingValueIn
dataOut = numpy.where(numpy.greater(dataOut,missing), missingValueOut, dataOut)
elif missingMatch == 'equal':
missing = missingValueIn
dataOut = numpy.where(numpy.equal(dataOut,missing), missingValueOut, dataOut)
elif missingMatch == 'less':
if missingValueIn < 0.0:
missing = 0.99*missingValueIn
else:
missing = 1.01*missingValueIn
dataOut = numpy.where(numpy.less(dataOut,missing), missingValueOut, dataOut)
return dataOut
def rgrd(self,
dataIn,
missingValueIn,
missingMatch,
logYes='yes',
positionIn=None,
missingValueOut=None):
""" #---------------------------------------------------------------------------------
#
# PURPOSE: To perform all the tasks required to regrid the input data, dataIn, into the ouput data,
# dataout along the level dimension only.
#
# DEFINITION:
#
# def rgrd(self, dataIn, missingValueIn, missingMatch, positionIn = None, missingValueOut = None):
#
#
# PASSED : dataIn -- data to regrid
#
# missingValueIn -- the missing data value to use in setting missing in the mask. It is required
# and there are two choices:
# None -- there is no missing data
# A number -- the value to use in the search for possible missing data.
# The presence of missing data at a grid point leads to recording 0.0 in the mask.
#
# missingMatch -- the comparison scheme used in searching for missing data in dataIn using the value passed
# in as missingValueIn. The choices are:
# None -- used if None is the entry for missingValueIn
# exact -- used if missingValue is the exact value from the file
# greater -- the missing data value is equal to or greater than missingValueIn
# less -- the missing data value is equal to or less than missingValueIn
#
# logYes -- choose the level regrid as linear in log of level or linear in level. Set to
# 'yes' for log. Anything else is linear in level.
#
#
#
# positionIn -- a tuple with the numerical position of the dimensions
# in C or Python order specified in the sequence longitude,
# latitude, level and time. Longitude, latitude and level are
# required. If time is missing submit None in its slot in the
# tuple. Notice that the length of the tuple is always four.
#
# Explicitly, in terms of the shape of dataIn as returned by Python's shape function
#
# positionIn[0] contains the position of longitude in dataIn
# positionIn[1] contains the position of latitude in dataIn
# positionIn[2] contains the position of level in dataIn or None
# positionIn[3] contains the position of time in dataIn or None
#
# As examples:
# If the C order shape of 4D data is
# (number of longitudes, number of times, number of levels, number of latitudes)
# submit
# (0, 3, 2, 1)
#
# If the C order shape of 3D data is
# (number of longitudes, number of times, number oflatitudes)
# submit
# (0, 2, 1, None)
#
# Send in None if the shape is a subset of (time, level,
# latitude, longitude) which is evaluated as follows:
# 3D -- code assumes (2,1,0,None)
# 4D -- code assumes (3,2,1,0)
#
# missingValueOut -- the value for the missing data used in writing the output data. If left at the
# default entry, None, the code uses missingValueIn if present or as a last resort
# 1.0e20
#
#
# RETURNED : dataOut -- the regridded data
#
#
# USAGE:
#
# Example 1. To regrid dataIn into dataOut using all the defaults where None, None signifies no
# missing data.
# dataOut = x.rgrd(dataIn, None, None)
#
# Example 2. To regrid dataIn into dataOut using 1.0e20 and greater as the missing data
#
# dataOut = x.rgrd(dataIn, 1.e20, 'greater')
#
#---------------------------------------------------------------------------------------------------------------------"""
# check the required input -- dataIn, missingValueIn and missingMatch
# make sure that dataIn is an array
try:
z = len(dataIn)
except TypeError:
sendmsg(
'Error in calling the rgrd method -- dataIn must be an array')
raise TypeError
# check the missingValueIn pass
if missingValueIn != None:
try:
z = abs(missingValueIn)
except TypeError:
sendmsg(
'Error in calling the rgrd method -- missingvalueIn must be None or a number. Now it is ',
missingValueIn)
raise TypeError
# check the missingMatch pass
missingPossibilities = ['greater', 'equal', 'less', None]
if missingMatch not in missingPossibilities:
msg = 'Error in missingMatch -- it must be None or the string greater, equal, or less. Now it is '
sendmsg(msg, missingMatch)
raise ValueError
# --- Check data type and change to float if necessary ----
if dataIn.dtype.char != 'f':
dataIn = dataIn.astype(numpy.float32)
dataShape = dataIn.shape
numberDim = len(dataShape)
if numberDim < 2:
msg = 'Error in call to rgrd -- data must have at least 2 dimensions'
sendmsg(msg)
raise TypeError
# --- evaluate positionIn ----
# --- make standard positionIn as a check----
positionList = []
for n in range(numberDim): # insert a sequence of numbers
positionList.append(n)
positionList.reverse()
for n in range(numberDim, 4): # fill end of list with Nones
positionList.append(None)
positionCheck = tuple(positionList)
standardPosition = 0 # transpose required
if positionIn == None: # construct the default positionIn tuple
positionIn = positionCheck
standardPosition = 1 # no need for a transpose with this data
else:
if positionIn == positionCheck: # compare to the standard
standardPosition = 1 # no need for a transpose with this data
if len(positionIn) != 4:
msg = 'Error in call to rgrd -- positionIn must be a tuple of length 4'
sendmsg(msg)
raise TypeError
if standardPosition == 0: # transpose data to the standard order (t,z,y,x)
newOrder, inverseOrder = checkorder(positionIn)
dataIn = numpy.transpose(
dataIn, newOrder) # transpose data to standard order (t,z,y,x)
dataIn = numpy.array(dataIn.astype(numpy.float32),
numpy.float32) # make contiguous
# set dimension sizes and check for consistency
if positionIn[0] != None:
self.nlon = (dataShape[positionIn[0]])
else:
self.nlon = 0
if positionIn[1] != None:
self.nlat = (dataShape[positionIn[1]])
else:
self.nlat = 0
if positionIn[2] != None:
if self.nlevi != (dataShape[positionIn[2]]):
msg = 'Level size is inconsistent with input data'
sendmsg(msg)
raise ValueError
if positionIn[3] != None:
self.ntime = (dataShape[positionIn[3]])
else:
self.ntime = 0
# allocate memory for dataOut -- the array with new number of levels
outList = list(dataIn.shape)
for i in range(len(outList)):
if outList[i] == self.nlevi:
outList[i] = self.nlevo
break
dataOut = numpy.zeros(tuple(outList), numpy.float32) # memory for aout
if missingMatch == None: # if no missing do not pass None
missingMatch = 'none'
if missingValueIn == None: # if no missing do not pass None
missingValueIn = 1.333e33
if logYes != 'yes':
logYes = 'no'
levIn = self.axisIn[:].astype(numpy.float64)
levOut = self.axisOut[:].astype(numpy.float64)
_regrid.rgdpressure(self.nlevi, self.nlevo, self.nlat, self.nlon,
self.ntime, missingValueIn, missingMatch, logYes,
levIn, levOut, dataIn, dataOut)
if missingMatch == 'none': # if no missing do not pass None
missingMatch = None
if missingValueIn == 1.333e33:
missingValueIn = None
if standardPosition == 0:
dataOut = numpy.transpose(
dataOut, inverseOrder) # transpose data to original order
dataOut = numpy.array(dataOut.astype(numpy.float32),
numpy.float32) # make contiguous
if missingValueOut != None: # set the missing value in data to missingValueOut
if missingMatch == 'greater':
if missingValueIn > 0.0:
missing = 0.99 * missingValueIn
else:
missing = 1.01 * missingValueIn
dataOut = numpy.where(numpy.greater(dataOut, missing),
missingValueOut, dataOut)
elif missingMatch == 'equal':
missing = missingValueIn
dataOut = numpy.where(numpy.equal(dataOut, missing),
missingValueOut, dataOut)
elif missingMatch == 'less':
if missingValueIn < 0.0:
missing = 0.99 * missingValueIn
else:
missing = 1.01 * missingValueIn
dataOut = numpy.where(numpy.less(dataOut, missing),
missingValueOut, dataOut)
return dataOut