Handling character array rather than cell

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Yongmin
Yongmin on 13 Jun 2015
Commented: Yongmin on 13 Jun 2015
Hello,
I have a text file (file name: X) having identifiers with 64 byte characters. I used textscan function to read the identifiers in MATLAB as follows:
fid = fopen('X','r');
data = textscan(fid,'%64c','delimiter',',');
As a results, I have a cell of records having 64 byte identifiers. My question is how to have a character array instead of a cell?
I can use function char() to change a cell into a character array:
data = char(data);
But I want to generate a character array when I read the text file using textscan because char() function requires another long time to execute.
Thank you for your attention.

Accepted Answer

Azzi Abdelmalek
Azzi Abdelmalek on 13 Jun 2015
data{:}
  1 Comment
Yongmin
Yongmin on 13 Jun 2015
Hello Azzi,
Do you mean use data{:} instead of using char() ? I will try to use the command.
Thanks a lot for your answer!!

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More Answers (1)

Walter Roberson
Walter Roberson on 13 Jun 2015
fid = fopen('X','r');
data = textscan(fid,'%64c','delimiter',',');
data = data{1}; %extracts array of char from cell array
When you use %c format in textscan the corresponding output is an array of character; and as usual, the outputs are all encapsulated in a cell array.
This differs from using %s format in textscan, in which case the corresponding output is a cell array of strings, which is something you might want to apply char() to in order to create a character array.
There is no way to get textscan to return values not encapsulated in a cell array. There is, however, no conversion time to use data{1} to get at the character array.
  1 Comment
Yongmin
Yongmin on 13 Jun 2015
Dear Walter Robserson,
Thanks a lot for your kind explanation. I understand the limitation of textscan function.

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