problem occur when i convert the .csv file into .mat file

Hello everyone,

i create a dataset in matlab is 1500X5 . i convert it into .csv for labeling the data. after the labeling i convert back into the .mat format but when i access the labeled dataset in matlab the columns are shown me like 1500X1...1500X1. how to resolve this problem .

in the below i attach screemshot of my dataset before and after conversion.

first image shown before the labeling data .mat file look like this.

after labeling when i convert .csv to .mat the file is look like the ablove image.