convert .csv file to .xlsx?

How can I convert a .csv file to .xlsx file in matlab?

Thank you.

Answer 1

[Walter Roberson]

You can use either csvread() or xlsread() to read the file, and then you can use xlswrite() to write the new file.

[Walter Roberson]

These days we would recommend readtable() and writetable() or readcell() and writecell()

[Walter Roberson]

T = readcell(filename);
writecell(T, NewFileName)

[Lev Vitkin]

If some cells of the .csv table are empty, then T = readcell(filename) returns the cell array where the empty cells are replaced by 'missing'. And writecell(T, NewFileName) cannot process 'missing' cells.

Use the following instead:

T = readmatrix(filename,delimitedTextImportOptions('DataLines',[1,Inf]));

writecell(T, NewFileName);

Answer 2

[Azzi Abdelmalek]

Look at this example

[~,~,a]=xlsread('your_file.csv')
b=regexp(a,',','split')
c=reshape([b{:}],numel(b{1}),[])'
xlswrite('new_file.xlsx',c)

[Zongyu Liu]

thanks. the scripts still work like a charm in 2020.

[Carmen Ellenberg]

Matlab always shows me a problem with the regexp funktion.

Does anybody have an idea?

[Walter Roberson]

The third output of xlsread() is a cell array, and the entries in that cell can have different data types:

• numeric
• character vector
• datetime object (not sure about this one)

The third output will not be pure character vectors, not unless the file contains only text and no empty cells.

regexp() can process the character vectors, but it cannot process numeric entries.

The regexp in that code would have limited value. All that it would change would be entries that were text in the file and had quoted commas, such as

3,5,"firefly, Oxford"

The other commas such as between the 3 and 5 would already have been used to figure out the cell boundaries for xlsread.

If you do have quoted commas then it is not obvious that you want them split.

That reshape is not doing anything useful compared to just using the [b{:}]

Overall I would recommend against using the suggested code.