Why my program always get '0' at initialization?

Question

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    function out=gett(A)
if A(1)==0
    out=1;
else
    out=0;
end
A(1)
end

My M-file Integrator block :initial condition=-2

but workspace is correct output.

How should I avoid this case?

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Answer 1

Azzi Abdelmalek 2013-1-26

编辑：Azzi Abdelmalek 2013-1-26

0 个投票

Your Matlab function is not an integrator, your output signal is 0 or 1

if A(1)==0
  out=1;
else
  out=0;
end

And the matlab function does not have an initial output setting

Azzi Abdelmalek 2013-1-26

You are displaying the output of the matlab function. According to your code it is 0 or 1

YEH 2013-1-27

When time is [0;2;4;6] the input is [-2;0;2;4], so the answer will be [0;1;0;0], that is correct.

But the program get the '0' input that is wrong!! Because the initial input is '-2'.

'0' is the simulink at initialization, I don't want it that is my problem.