How to plot the error between two signals?

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afef 2017-9-25

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https://ww2.mathworks.cn/matlabcentral/answers/358298-how-to-plot-the-error-between-two-signals

评论： afef 2017-9-27

I did the filtering of an EEG signal using fir filter then i implement this fiter in c langage. Now i need to plot the error between the to filter but i don't know how to do that. Can anyone help me please.

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Walter Roberson 2017-9-25

plot(x-a) ?

afef 2017-9-25

Ok i will try it .

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采纳的回答

KSSV 2017-9-26

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/358298-how-to-plot-the-error-between-two-signals#answer_283130

在 MATLAB Online 中打开

x = 1:10;
y1 = 2*x;
y2 = 3.5*x;
% error
dy = y2-y1 ;
% Multiple plot commands, with "hold" on
figure
hold on
plot(x,y1,'r');
plot(x,y2,'b');
plot(x,dy,'g');
%
legend('Signal1','Signal2','error')

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Walter Roberson 2017-9-26

编辑：Walter Roberson 2017-9-26

KSSV needed some data for illustration purposes, so he created a range of x from 1 to 10, and created one line as 2*x and a second line as 3.5 * x. In your actual code you would replaces those three lines with your own data.

afef 2017-9-27