CODEWITHSUNDEEP
matlabtextscan
mee mee
mee mee

Reputation: 557

why textscan does not read all rows matlab

I have a text file which have 5 columns. Here is sample data:

book   1  3  5  7
paper  3  9  0  2
pen    3  1  2  0
pencil 9  0  3  9

The first column contains character and the other columns are just number. The file contains several rows. I am trying to read that .txt as follows;

fileID = fopen('filename.txt');
C = textscan(fileID,'%s %n %n %n %n');
fclose(fileID);
celldisp(C)

It read the column correctly. However, it reads only the first row, and not all. Why it is happening that way? How to do if I want to read all rows and all columns. Thanks

Upvotes: 0

Views: 959

Answers (1)

AlessioX
AlessioX

Reputation: 3177

I assume you want to create a cell array in which every cell contains a single element from your text file.
The code you provided so far is correct:

fileID = fopen('filename.txt');
C = textscan(fileID,'%s %n %n %n %n');
fclose(fileID);

However now each cell in C contains an entire column from your txt file: enter image description here
where C{1,1} contains the first column, that are four strings (book, paper, pen, pencil).

Now it is time un "unwrap" such cells using this piece of code:

for i=1:size(C,2)
    if(iscell(C{:,i}))
        A(:,i)=reshape(C{:,i},length(C{:,i}),1);
    else
        A(:,i)=num2cell(reshape(C{:,i},length(C{:,i}),1));
    end
end

that basically says "if the cell contains a cell (see C{1,1}) just unwrap its content in length(C{:,i}) different cells. As instead if the cell contains an array, assign each element of this array to a different cell.".
Now the cell array A has the form

enter image description here

and I hope this is what you're looking for.

Upvotes: 2

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