清空筛选条件
清空筛选条件

Problem in importing textfiles

1 次查看（过去 30 天）
afrya
afrya 2015-1-9
评论： afrya 2015-1-12
Hello,
I would like to import a textfile with matlab. The textfile consist of decimal numbers. It looks like:
X Y Z
0,1 0,2 0,3
0,4 0,5 0,6
0,7 0,8 0,9
I use the following code to import the data:
filename = 'Textfile-test.txt';
delimiterIn = ' ';
headerlinesIn = 1;
A = importdata(filename,delimiterIn,headerlinesIn);
My problem is that the numbers are not imported by matlab. Do you have any idea how to solve this problem.
Thank you in advance

请先登录，再回答此问题。

采纳的回答

Stephen23
Stephen23 2015-1-11
MATLAB only recognizes the period character as the decimal radix, so you will need to change that comma character before converting to numeric. To achieve this when reading the file with MATLAB, you could do something like this:
fid = fopen('temp.txt');
C = textscan(fid, '%s%s%s');
fclose(fid);
C = [C{:}];
hdr = C(1,:);
dat = regexprep(C(2:end,:),',','.');
dat = cellfun(@(s)sscanf(s,'%f'),dat);

更多回答（1 个）

dpb
dpb 2015-1-9
What error(s), if any did you get?
With that file structure, simply
x=importdata(filename);
should work altho don't see anything obviously wrong with the specific form.
Have you ensured the file is actually on the Matlab search path and the filename is spelled correctly, etc., etc, etc., ...?
  3 个评论
显示 1更早的评论
dpb
dpb 2015-1-11
...the decimal limiter is the comma...
Woops, my old eyes whiffed on that, sorry. AFAIK, that's not a changeable option, you either have to change the file format itself or read the data and do a translation in memory before scanning the data.
It's a pain in the proverbial appendage for those locales where the convention is the other way 'round, I know...
afrya
afrya 2015-1-12
编辑：afrya 2015-1-12
Ok thank you for your help

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Low-Level File I/O 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by