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Re: define a function with variable coefficients
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Andong He
Dec 30, 2009, 4:14:58 AM12/30/09
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Thank you Daniel, your response is helpful.
But what I want is Power[z,j] instead of Superscript[z,j], because I wanna raise z to power 1,2,..., n, and it doesn't work!
Again I get terms like a_(1+n)[t] and a_(2+n)[t]. So confusing!
But what I want is Power[z,j] instead of Superscript[z,j], because I wanna raise z to power 1,2,..., n, and it doesn't work!
Again I get terms like a_(1+n)[t] and a_(2+n)[t]. So confusing!
Where did I make a mistake?
Norbert P.
Dec 31, 2009, 3:14:34 AM12/31/09
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> But what I want is Power[z,j] instead of Superscript[z,j], because I wann=
a raise z to power 1,2,..., n, and it doesn't work!
> Again I get terms like a_(1+n)[t] and a_(2+n)[t]. So confusing!
>
> Where did I make a mistake?
a raise z to power 1,2,..., n, and it doesn't work!
> Again I get terms like a_(1+n)[t] and a_(2+n)[t]. So confusing!
>
> Where did I make a mistake?
As Daniel said, a_j[t] is interpreted as Pattern[a, Blank[j]][t]
because _ (underscore) has a build-in meaning in Mathematica (look up
Blank). It can't be a part of a symbol name as in other programming
languages. That's probably what's causing your problems. Use Subscript
[a,j][t] instead. As for the power, ^ will work just fine, but you
said you wanted a superscript ;)
Norbert
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