"Axis" function error

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kale
kale on 3 Oct 2022
Edited: dpb on 5 Oct 2022
I'm using axis function but there is this error:
How do I solve it?
Thanks!

Accepted Answer

dpb
dpb on 3 Oct 2022
Edited: dpb on 5 Oct 2022
-3 < 0 despite abs(3) being greater -- as the error message says, the axis limits have to be in strictly ascending order numerically, not in the order they appear on the drawn figure above...
Unfortunately we can't copy/paste figures instead of text, but the culprit line above should be
%axes([0 20 k 0])
when k<0
You don't need an axis command here at all, though, it will be created automagically when call
k=-3;tau=4;
G=tf(k,[tau 1]);
step(G)
xlim([0 20])
is simpler way to get there, anyway...

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