saving a .csv file with text values as a .mat file

Question

Apurva Jariwala 2019-2-19

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https://ww2.mathworks.cn/matlabcentral/answers/445708-saving-a-csv-file-with-text-values-as-a-mat-file

评论： Apurva Jariwala 2019-2-19

I tried using csvread, but it only accepts csv files with numeric values. I want to convert a csv file e.g. fisheriris.csv to .mat file, how can i do that?

Also, how to change the class labels with numbers or letters like a,b,c.. ?

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Answer 1

Walter Roberson 2019-2-19

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https://ww2.mathworks.cn/matlabcentral/answers/445708-saving-a-csv-file-with-text-values-as-a-mat-file#answer_361648

在 MATLAB Online 中打开

T = readtable('fisheriris.csv');
Tlabcat = categorical(T{:,5});
Tcats = categories(Tlabcat);
Tlabnum = double(Tlabcat);
Tnum = [T{:,1:4}, Tlabnum];

Now Tcats is a cell array of character vectors indicating the category names, and Tnum is a double array of the data, with the last column being a class number converted from the text category labels.