Reading mat files¶
Here are examples of how to read two variables
lon from a mat file called "test.mat".
= Matlab up to 7.1 =
mat files created with Matlab up to version 7.1 can be read using the
mio module part of
scipy.io. Reading structures (and arrays of structures) is supported, elements are accessed with the same syntax as in Matlab: after reading a structure called e.g.
lat element can be obtained with
struct.__getattribute__('lat') if the element name comes from a string.
#!python #!/usr/bin/env python from scipy.io import loadmat x = loadmat('test.mat') lon = x['lon'] lat = x['lat'] # one-liner to read a single variable lon = loadmat('test.mat')['lon']
Matlab 7.3 and greaterÂ¶
Beginning at release 7.3 of Matlab, mat files are actually saved using the HDF5 format by default (except if you use the -vX flag at save time, see in Matlab). These files can be read in Python using, for instance, the PyTables or h5py package. Reading Matlab structures in mat files does not seem supported at this point.
#!python #!/usr/bin/env python import tables file = tables.openFile('test.mat') lon = file.root.lon[:] lat = file.root.lat[:] # Alternate syntax if the variable name is in a string varname = 'lon' lon = file.getNode('/' + varname)[:]
Section author: Unknown, DavidPowell, srvanrell