MATLAB Central Newsreader - can not read float numbers from a txt file.

can not read float numbers from a txt file.

Leblead Sweid — Thu, 13 Aug 2009 09:25:17 -0400

Hi everybody,

i am trying to read float numbers from a text file, but it worked only if i assume the float numbers as string .To be more clear, i have tried that:

data=textscan(fid,'%*s%s%s%s%s%s%s%s%s%s%s%s%s%s','delimiter', ';')

to read that file

00:00:19,968;8,02;8,44;8,30;7,79;8,19;7,96;9,80;9,44;15,42;16,35;13,40;13,19;8,16;
00:00:19,972;8,00;8,49;8,35;7,86;8,24;7,85;9,72;9,33;15,01;16,04;13,41;13,43;8,05;
00:00:19,976;7,91;8,40;8,18;7,89;8,13;7,96;9,78;9,49;15,14;16,36;13,41;13,31;8,02;
00:00:19,980;7,95;8,45;8,29;7,84;8,19;8,02;9,92;9,53;15,00;16,49;13,28;13,34;8,26;

so when i used:

data=textscan(fid,'%n%n%n%n%n%n%n%n%n%n%n%n%n%n','delimiter', ';')

i got only two arrays instead of 14 arrays and in the two arrays there are only numbers with nothing after the comma.

thanks .

Re: can not read float numbers from a txt file.

Rune Allnor — Thu, 13 Aug 2009 10:40:25 -0400

On 13 Aug, 11:25, "Leblead Sweid" <bhann...@live.com> wrote:
> Hi everybody,
>
> i am trying to read float numbers from a text file, but it worked only if i assume the float numbers as string .To be more clear, i have tried that:
>
> data=textscan(fid,'%*s%s%s%s%s%s%s%s%s%s%s%s%s%s','delimiter', ';')
>
> to read that file
>
> 00:00:19,968;8,02;8,44;8,30;7,79;8,19;7,96;9,80;9,44;15,42;16,35;13,40;13,19;8,16;

You are using a locale where the decimal mark is comma
rather than dot. You need to change this before you
attempt to convert from text to numbers.

If you read the lines from the file yourself (as opposed
to using some canned routine), use

s = sttrep(s,',','.');

You might also have a problem with the penultimate column,
which contains 13,1-9. It is not at all obvious that this
will be accepted, or if so, converted correctly:

>> sscanf('13.1-9','%f')

ans =

   13.1000
   -9.0000

>> str2num('13.1-9')

ans =

    4.1000

Rune

Re: can not read float numbers from a txt file.

Rune Allnor — Thu, 13 Aug 2009 10:41:51 -0400

On 13 Aug, 12:40, Rune Allnor <all...@tele.ntnu.no> wrote:

> > 00:00:19,968;8,02;8,44;8,30;7,79;8,19;7,96;9,80;9,44;15,42;16,35;13,40;13,19;8,16;

> You might also have a problem with the penultimate column,
> which contains 13,1-9.

Sorry, something bad happened when I cut'n pasted
your data to matlab.

Rune

Re: can not read float numbers from a txt file.

Andres — Thu, 13 Aug 2009 19:36:03 -0400

Hi,
try

data = txt2mat(filename.txt);

with txt2mat from the file exchange ( http://www.mathworks.de/matlabcentral/fileexchange/18430 ).