How To Load A Mat File In Python

Reading them in is definitely the easy part.

How to load a mat file in python. Surf x y u but i want to do it in python also. I have a file myfile mat exported from octave it contains three matrices x y u all of them have same size and i want to plot surface u where x y are the x and y components of surface u. The file albeck gene expression mat is in your working directory. Do so using the function scipy io loadmat.

Dictionary in which to insert matfile variables. Now we can load that data in python with the scipy io module and use the print function to prove it s there. Can also pass open file like object. Load a mat file into a python data structure.

Mat scipy io loadmat cardio mat in 1758. Data loadmat datafile mat the variable data is a dict with the variables and values contained in the mat file. Cardio df pd dataframe np hstack mat x mat y in 1759. Now we have a file data mat which stores the array a the structure s containing an array b and an array of structures m where each of those contains an array c.

You can find the data and some great documentation here. This file contains gene expression data from the albeck lab at uc davis. Take hint 30 xp. Use the function type to print the datatype of mat to the ipython shell.

0 1 2 3 4 5 6 0 0 004912 0 693191 0 203640 0 595322 0 353190 0 061401 0 278295 1 0 110729 0 079903 0 203640 1 268942 0 396246 0 061401 0 278295 2 0 216546 0 272445 0 203640 1 050988 0 148753 0. Scipy is a really popular python library used for scientific computing and quite naturally they have a method which lets you read in mat files. I can do it in octave with the following code. You can get the file used in this post here.

Assuming x is the data and y are the labels for the same you can stack them horizontally with np hstack and load them into pandas. You can get it done in one line of code. In this exercise you ll figure out how to load a matlab file using scipy io loadmat and you ll discover what type of python datatype it yields. Name of the mat file do not need mat extension if appendmat true.

From scipy io import loadmat annots loadmat cars train annos mat well it s really that simple. Load the file albeck gene expression mat into the variable mat. Eg usr bin env python from scipy io import loadmat x loadmat test mat lon x lon.