Perform discrete-time integration in MATLAB script

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John
John am 30 Jul. 2014
Beantwortet: waqar mehboob am 1 Nov. 2018
Hi,
I would like to implement discrete-time integration of input signal in MATLAB script. For example, input signal is array x[k] for x(t)=Xsinwt
If frequency is f=10 Hz I can chose T=0.003 sec. When I tried with discrete-time integration (x-input, y-output)
y[n]=y[n-1]+0.5*T*(x[n]+x[n+1]), n>0, T=0.003
I changed a lot of y[0]=IC, but with no success. Do you know what can be the problem and how to determine IC automatically, because input signal can be in wide range of different types.
Tigar

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waqar mehboob
waqar mehboob am 1 Nov. 2018
You can use this script to help solve your problem. clc figure(close) % Simple Sine wave t=0:0.01:10; y=sin(2*t); plot (y) hold on; % Discrete time integration y1(1)=0; K=1; x(1)=0; T=0.015; for n=1:length(t) x(n+1) = x(n) + K*T*y(1,n); y1(n) = x(n); end plot(y1); grid on

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