Expanding symbolic answers

Expanding symbolic answers - Need help with displaying symbolic expression in different form - Сообщения

#1 Опубликовано: 14.10.2012 06:33:20
Eduard

Eduard

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Hello, first of all, thank you for a really good program.

My question: Is it possible to display a symbolic expression a a different form. For example, I have a transfer function in factored form, but I would like it expanded so that I can easily find the various coefficients of s, s^2, ... etc.

Is there a way to do this? (probably a noob question?)

Using 0.95
#2 Опубликовано: 05.10.2014 14:27:45
natezimmer

natezimmer

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sorry to bump an ancient topic but this would be reaaaaallllyyy handy.

For example (-1+λ)*(1+λ)+5 --> = (-1+λ)*(1+λ)+5. I can't find any way to make it perform the multiplication and end up with λ^2 + 4.

Any Ideas?
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Israel Espinoza 26.01.2024 03:39:00
#3 Опубликовано: 05.10.2014 15:53:13
Martin Kraska

Martin Kraska

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Wrote


For example (-1+λ)*(1+λ)+5 --> = (-1+λ)*(1+λ)+5. I can't find any way to make it perform the multiplication and end up with λ^2 + 4.


You can use SMath Studio with Maxima (see signature for download link)
simp.PNG
Martin Kraska Pre-configured portable distribution of SMath Studio: https://en.smath.info/wiki/SMath%20with%20Plugins.ashx
#4 Опубликовано: 05.10.2014 18:02:51
natezimmer

natezimmer

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Wrote

Wrote


For example (-1+λ)*(1+λ)+5 --> = (-1+λ)*(1+λ)+5. I can't find any way to make it perform the multiplication and end up with λ^2 + 4.


You can use SMath Studio with Maxima (see signature for download link)



Did I ever mention how handsome you are?
That portable plugin w/ max version is aawweeessomme!
I would thank you a million times but I get an error when I try to do it even once.
#5 Опубликовано: 05.10.2014 18:45:13
natezimmer

natezimmer

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Edit:

Still having issues. I can't prevent max from factoring.
if I change the example to (-2+λ)*(1+λ)+5 --> 3+λ*(-1+λ)

I've tried expand, multthru ...ect without luck. Attempting to get λ^2 -3*λ +λ
#6 Опубликовано: 05.10.2014 19:33:06
Martin Kraska

Martin Kraska

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Sometime Maxima-results are modified by SMath's simplifier. If you set optimization->None then you get the original Maxima answer.

Maxima(expandwrt((-2+λ)*(1+λ)+5,λ))=λ^2-λ+3
Martin Kraska Pre-configured portable distribution of SMath Studio: https://en.smath.info/wiki/SMath%20with%20Plugins.ashx
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