Importing Data from a TXT file

I have successfully managed to read a text file containing a large number of values, however, I am unable to use these value in MATLAB. I think this is because in the array they have apostrophe's around the numbers, for example, '0.235659'.

The code I used to read the text file and store the values in an array is:

fid = fopen('Kap.PORO');

tline = fgetl(fid);
tlines=cell(0,1);
while ischar(tline)
    %disp(tline)
    tlines{end+1,1}=tline;
    tline = fgetl(fid);
end

fclose(fid);

I was wondering if anyone knew how to either convert these into an array where I can use the values or a better way of storing values from a TXT file.

Thanks

[Stephen23]

It is likely that textscan (or one of the similar functions) would be much easier to use.

If you simply upload your textfile using the paperclip button above the textbox, then we can try it for ourselves. This is much easier for everyone! You will need to push both the Choose file and Attach file buttons.

Answer 1

[Stephen23]

The single quotes indicate that this is a cell-array of strings, where the strings contain some numeric values. Note that this is quite a different thing to a call array of numeric values:

>> {'1.2','3.4','5.6'} % cell array of strings
ans = 
  '1.2'    '3.4'    '5.6'
>> {1.2,3.4,5.6} % cell array of numeric values
ans = 
  [1.2000]    [3.4000]    [5.6000]

To convert a cell array of strings to a numeric array you can simply use str2double like this:

>> str2double({'1.2','3.4','5.6'})
ans =
  1.2000    3.4000    5.6000

But the best solution is still likely to be to import the data using textscan.