ilaplace confusing - result from command window and from m file gui is not the same
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Hi,
I write in command window:
ilaplace((0.99984898859777815438576453743735*s^2 + 1414.0*s - 414151.01140222184561423546256265)/((s + 1000.0)*(s^2 + 1000000.0)))
And I got : ans =
(199002808534433793169*cos(1000*t))/140737488355328000000 - 58286573144567511919/(140737488355328000000*exp(1000*t)) - (1169*sin(1000*t))/140737488355328000000
I write the same in m file from GUI and I got:
0.707*exp(1000.0*t*i) - 0.41415101140222184561423546256265/exp(1000.0*t) + 0.707*(1/exp(1000.0*t*i))
WHY I GOT COMPLEX NUMBER? "i"?
Accepted Answer
Mischa Kim
on 21 Jan 2014
Edited: Mischa Kim
on 21 Jan 2014
Hello John, it is actually the same. Try plotting the two results.
The reason you get complex numbers is because of Euler's formula:
exp^(ix) = cos(x) + i*sin(x)
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