清空筛选条件
清空筛选条件

Saving signal as a text file

21 次查看（过去 30 天）
John Smith
John Smith 2015-11-20
评论： Guillaume 2015-11-21
Hi. I am having problems saving a signal as a text file. Let's assume we have the signal below, how can I save xt as a text file with the first column representing the time the second column representing the amplitude?
Fs = 8000; % samples per second
Ts = 1/Fs; % seconds per sample
t = 0: Ts: 3; % Start signals at 0sec and stop after 3sec
% Sine wave x1[n]:
Fc = 1;
x1 = sin(2*pi*Fc*t);
% Sine wave x2[n]:
Fc = 760;
x2 = sin(2*pi*Fc*t);
% Sine wave x3[n]:
Fc = 1280;
x3 = sin(2*pi*Fc*t);
% Sine wave x4[n]:
Fc = 2000;
x4 = sin(2*pi*Fc*t);
xt = x1 + x2 + x3 + x4;

请先登录，再回答此问题。

采纳的回答

Image Analyst
Image Analyst 2015-11-20
How about making it a csv file:
filename = 'deleteme.csv' % Whatever you want.
csvwrite(filename, [t', xt']);
type(filename) % type to command window.
%delete(filename); % Delete the file.

更多回答（2 个）

Guillaume
Guillaume 2015-11-20
编辑：Guillaume 2015-11-20
One simple way:
t = table(t', xt', 'VariableNames', {'Time', 'Amplitude'});
writetable(t, 'somefile.txt');
  2 个评论
John Smith
John Smith 2015-11-20
Thanks for the reply, it worked. Is it possible to save just the data values? I removed {'Time', 'Amplitude'}, but it did not work. Also, how can I replace the commas between the columns with blank spaces?
Guillaume
Guillaume 2015-11-21
A quick look through the documentation of writetable would have answered both questions:
writetable(t, 'somefile.txt', 'WriteVariableNames', false, 'Delimiter', ' ');

请先登录，再进行评论。

Image Analyst
Image Analyst 2015-11-20
If you want no header and a space between the numbers, use this:
filename = 'deleteme.csv' % Whatever you want.
dlmwrite(filename, [t', xt'], 'delimiter', ' ');
type(filename) % type to command window.
  1 个评论
John Smith
John Smith 2015-11-20
Thanks it worked. I replaced .csv with .txt to save it as text file.

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Text Files 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