I understand that you have been trying to import the file with multiple columns and then save to a .mat file. In your screenshot, we can see that the data variable has only 1 row of entry. This would be due to an incorrect import of “.dat” files. Kindly refer to the following answer on importing “.dat” files correctly into MATLAB:
Once the data has been imported in the right format, you can use the “save()” function to save the variable to a “.mat” file. Please refer to the documentation below:
