README.md

tcwpy

Library for reading TransCad files into Numpy arrays

• Required TransCad license to read matrices
• User needs to manually change the path to the TransCad matrix dll on disk for this library to work
• Last tested with Transcad 6, Release 2

NOT RELATED IN ANY WAY WITH CALIPER CORPORATION

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Usage example (Matrix)

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Instatiating a matrix

from tcwpy import TCWMtx

matrix = 'path+matrix_name.mtx'

cores_to_load = ['core1', 'core2']

mymatrix = TCWMtx()

Loading all matrix cores

mymatrix.load(matrix, verbose=True) #### verbose option prints on the screen all loading steps happening

Loading only a few cores

mymatrix.load(matrix, justcores=cores_to_load, verbose=True)

Printing names of all loaded cores

for q in mymatrix.matrix.keys():

print q

exports matrix to csv file

mymatrix.export(core_name, file_path_and_name, all_cells=False)

Since the matrix has indices that are not necessarily 0, 1, 2, 3, ...

accessing the matrix as mymatrix.matrix[core][i,j] does not work

one needs to access through

mymatrix.value(core, i, j)

The matrix indices can be accesed through

matrix.RHash[:] #### for rows

matrix.CHash[:] #### for columns

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Usage example (binary)

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from tcwpy import DataBintx

f = DataBin()

f.load(path+name_of_the_file.bin)

prints all columns in the bin

for name in a.dtype.names: print name

prints information about the data table

f.info()

Saves data table to a csv

f.savetxt(output_file_name.csv)