Make Mat File Loading And Saving Fast

Matlab 2017a allows deactivation of the compression but even that helps only marginally and sometimes seems to slow loading even further.

Make mat file loading and saving fast. Use a mat file object to access and change variables in a mat file without loading the file into memory. If filename has no extension that is no period followed by text and the value of format is not specified then matlab appends mat if filename does not include a full path matlab saves to the current folder. You also can drag the desired variables from the current folder. Again i looked a bit too fast at that.

This section explains how to save the variables in your matlab session to a binary file called a mat file and how to load them back into your matlab workspace. It covers the following. Partial loading and saving of variables using a mat file object requires less memory than the load and save commands. For me it decreased the time required to read the matrix from 4 9 s to 2 0 s on top comes 0 5 s for each loading for permuting and 3 5 s while saving.

This array called bathymetry i want to be formed by 3 other arrays for example x y and z. Saving the file is just as bad. I have to agree with faisal at least in some scenarios mat i o is absolutely sluggish. Mat files are double precision binary matlab format files.

In a way that when i charged the mat file it transforms into three files called x y and z. Gui set parameters to mat file loading and saving parameters follow 8 views last 30 days maarten on 26 sep. You can save and load parts of variables directly in mat files without loading them into memory using the matfile function. Select the mat file you want to load and click open.

Hugematrix has dimensions 3000 1001 1001 of type single. If you do not specify filename the save function saves to a file named matlab mat. Name of file specified as a character vector or string scalar. Save and load parts of variables in mat files.

To load a subset of variables from a mat file on the home tab in the variable section click import data. Importing data from mat files. Gui set parameters to mat file loading and. Exporting data to mat files.

You can load or save parts of variables. Hello i want to create a mat file for example named bathymetry. To load saved variables from a mat file into your workspace double click the mat file in the current folder browser. Handles sum in your case is actually the handle of the uicontrol containing the sum.

The primary advantage of using the matfile function over the load or save functions is that you can process parts of very large data sets that are otherwise too large to fit in memory.