How to create cell array with a function?

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Dada
Dada 2017-4-7
编辑： Stephen23 2017-4-9
I need to create a function that takes each line from a text file and stocks this line in a cell array. The text file goes as so:
A B C D E
E D C B A
A D C B E
and so on. (the number of lines is unknown) I need it to stock as so:
{'A','B','C','D','E'}
{'E','D','C','B','A'}
and so on. My code is:
function [ T ] = ReadFile( File ) %imposed as format of the function
fid=fopen(File,'rt');
if fid~=-1
disp('File open.')
str=0;
i=1;
while ischar(str)
str=fgetl(fid);
T(i).items=strsplit(str) %here is how I stock the lines in a cell array, the field has to be named items.
i=i+1;
end
else
error('File not opened correctly')
end
However, I cannot seem to see the cell array in my main file, when I call the function. What am I doing wrong? Thank you

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回答（1 个）

Stephen23
Stephen23 2017-4-7
编辑：Stephen23 2017-4-8
A more efficient concept would use something like textscan:
function C = myfun(file)
opt = {'CollectOutput',true};
fmt = repmat('%s',1,5);
[fid,msg] = fopen(file);
assert(fid>=3,msg)
C = textscan(fid,fmt,opt{:});
fclose(fid);
C = num2cell(C{1},2); % nested cell array for each row
# C = C{1}; % one cell array with all values
end
and then simply call it like this:
C = myfun('myfilename')
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Dada
Dada 2017-4-8
I appreciate the sarcasm Stephen, even though it was not needed. ;) I did put my WHOLE code, but maybe I didn't express myself well enough. So let me restart.(I did end up correcting the str value that was not given, I forgot to replace ths tr with the variable t), the function go as so:
function [ T ] = ReadFile( File )
fid=fopen(File,'rt');
if fid~=-1
disp('File open.')
t=fgetl(fid);
T(1).items=strsplit(t);
i=2;
while ischar(t)
t=fgetl(fid);
T(i).items={strsplit(t)};
i=i+1;
end
else
error('File didn''t open correctly.')
end
fclose(fid);
end
Please note that the verification fid~=-1 is mandatory, since this is a class exercice and that's how we got to do it. Then I go into my main script, where the FIRST line is me calling my function, since this is the first step of the exercice:
T=ReadFile('File.txt');
I need to get the complete cell array T in my main script, since I will need in in the next steps of the exercice. However, it right away shows me this COMPLETE error:
Output argument "T" (and maybe others) not assigned during call to "ReadFile".
Error in TP5_Q2 (line 13)
T=ReadFile('File.txt');
So what am I doing wrong? And no, no fire brigade will be needed, thank you for asking.
Stephen23
Stephen23 2017-4-9
编辑：Stephen23 2017-4-9
Your code works for me:
>> T = ReadFile('answers.txt')
File open.
T =
1x6 struct array with fields:
items
May be you have multiple versions of your function saved, and an older version is getting called (and not the version that you think/want). Tell us what the output of this command is:
which ReadFile -all
Is this the location which you expect? Are multiple files listed? Is the directory where you have your function saved on the MATLAB search path?

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