# i have Question about Inverse lapalce transform & plot

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jongil park 2021년 5월 10일
댓글: Star Strider 2021년 5월 11일
hi. i try to cording matlab to draw a graph of inverse laplace transofrm result
F is a function made of R and G. and i want to inverse laplace transform that function F and draw a graph.
i really try hard but it didn't work. maybe there is a error at plot cording.
can i get a advice about it?
thank you.
here's my cording.
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
syms s
R = 1/s
G = 75/(s)^2+10.25*s+100.65
F = R * G
a = ilaplace (F)
x = t
t = [0,0.01,10];
y = a;
plot(x,y)
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jongil park 2021년 5월 11일
oh yes, that is right. i did mistake about this. thank you :D

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### 채택된 답변

Star Strider 2021년 5월 10일
Try this —
syms s
R = 1/s
R =
G = 75/(s)^2+10.25*s+100.65
G =
F = R * G
F =
a = ilaplace (F)
a =
% x = t
t = [0 10];
y = a;
fplot(y,t)
grid
Use fplot, not plot, for symbollic plots.
.
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Star Strider 2021년 5월 11일
@jongil park — As always, my pleasure!
@Paul — If you consider this to be a bug, or would like this as an ‘enhancement’, you can report it as such, request the enhancement, or both. Perhaps having this as an option (such as 'ShowDeltaFunction','on') would work.

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