How to convert a data Table from .mat to .csv

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Agnese Manzoni
Agnese Manzoni 2015-5-10
评论： Mudassir shakeel 2022-10-26
Let's do an example: I have a file called Pippo.mat To load in matlab I use this function: load('Pippo.mat')
How can I let matlab read Pippo.mat? Thank you.
  2 个评论
Nick Earnhardt
Nick Earnhardt 2015-5-10
编辑：Nick Earnhardt 2015-5-10
What's the question exactly?
You want to turn a mat file to csv file?! or ?
Sorry I'm confused
Have a look at
csvwrite()
and
csvread();
to turn the mat files to csv
Jan
Jan 2015-5-10
Please explain the difference between "load" and "read" and where does the conversion appear?

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回答（3 个）

mansour torabi
mansour torabi 2021-10-1
In matlab, to write a table to a csv file, use:
load('YourTableData.mat')
writetable(YourTableData, 'FileName.csv')
Abhiram Bhanuprakash
Hi Agnese,
Guessing from the title of your question, I think you want to load a MAT file into the MATLAB workspace and convert it to a CSV file, which you want to use it for further processing.
If this is the case, you can follow this workflow. Let's say we have a MAT file 'abc.mat' (attached), which contains two matrices and you want to load the two matrices into MATLAB and create a CSV from the concatenated matrix:
load('abc.mat');
%Concatenate matrices A and B
C = [A, B];
%Write CSV file
csvwrite('test.csv',C);
The created CSV file 'test.csv' is also attached. You can then use 'csvread' if you need to read from the created CSV file. The doc for csvread is here
Hope this helps
Cheers!
Abhiram
  2 个评论
yasser nasser
yasser nasser 2021-4-25
Error using csvwrite (line 47)
Cannot open file test.csv.
How can solve it?
Walter Roberson
Walter Roberson 2021-4-25
You do not have write access to your current directory. You should either cd() to a directory that you do have write access to, or else you should give the path to a location you do have write access to, such as
csvwrite('C:\Users\Yasser\Documents\MATLAB\Project3\test.csv', data_to_write);

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Ben Salem Youssef
Ben Salem Youssef 2017-12-29
hello everyone , i have problem with command "load": i have a file that called "Untitled5". and i want to load this file then i could use it and import it and use it for the Machine Learning, but i receive this error : Error using load Number of columns on line 2 of ASCII file Untitled5.m must be the same as previous lines. Any Idea please ?? Thank you
  2 个评论
Image Analyst
Image Analyst 2017-12-29
load() loads .mat files and other data files, not m-files. You cannot do
s = load(Untitled5.m');
to run your m-file, you just click the green Run tool button on the toolbar, or type F5 function key.
Read this link then start your own question and attach your .mat file with the paper clip icon.
Walter Roberson
Walter Roberson 2017-12-29
Can you attach the file?
Your use of .m as an extension hints the file might be MATLAB code, but you would execute MATLAB code instead of load()'ing it.

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