How To Read Variables From Mat File

Varlist is a cell array containing the names of the four variables in topography mat.

How to read variables from mat file.

Using a large mat file and extracting a single variable takes time. If you do not specify filename the load function searches for a file named matlab mat. If filename has no extension that is no text after a period load looks for a file named filename mat if filename has an extension other than mat the load function treats. You could use the load command to read data stored in a mat file.

Access specific parts of a variable in a mat file using the mat file object. Name of file specified as a character vector or string scalar. I think the problem is caused by the parfor so i would like to set the loaded variables as. I loaded the mat file and use the variables in the rest of the codes.

Show hide all comments. So your data data data etc variable names will get loaded as data data00002 data00003 etc. Even though the file is loaded outside the for loop it shows the variable is not defined during the calculation moreover the very same variable is used in even earlier calculation. After reading a structure called e g.

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. Reading a single line of a variable from mat file. This new version has undergone only a limited amount of testing but it appears to be working as expected. The dlmread function is used for reading ascii delimited file.

It has one field for each variable in the mat file. Here are examples of how to read two variables lat and lon from a mat file called test mat. The third and fourth variables topomap1 and topomap2 are both arrays containing topography data load the elevation data from the third column of each variable into a field of the structure array s for each field specify a field name that is the original variable name prefixed by elevationof. There is no magic acceleration.

Filename can include a file extension and a full or partial path. I repeat see the help on load. Using matfile object enables accessing to variables directly without loading the entire file from memory. Struct its lat element can.

For example you can save data to a subset of a variable in a mat file or read a subset of a variable into the matlab workspace. Save data to a subset of a variable y in the file myfile2 mat using the mat file object. The compression of the data of v7 3 files requires to decompress the complete or at least a large part of the data to extract you variable.