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Student Support Forum: 'Dynamic updating of variables in Manipulate' topicStudent Support Forum > General > "Dynamic updating of variables in Manipulate"

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JBB
07/18/12 5:39pm

Here I come again with a similar problem that I still don't get:

When I try to define a function with a Dsolve I get an error in Manipulate.

In a simplified example:

func[coef_] = {{y -> Function[{x}, DSolve[y'[x] == Cos[coef *x], y, x]]}}
Manipulate[Plot[{{Evaluate[y[x] /. func[coef] /. C[1] -> {Range[-5, 0]}]}}, {x, -10, 10}], {{coef , 1}, 0.1, 5}]

I get an error: DSolve::dsvar: "-9.99959 cannot be used as a variable"
I think that this is because Manipulate assigns a value to x (= -9.99959) BEFORE solving the DSolve.
Is there any workaround? Thanks, JBB


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Subject (listing for 'Dynamic updating of variables in Manipulate')
Author Date Posted
Dynamic updating of variables in Manipulate Jbb 07/07/12 4:11pm
Re: Dynamic updating of variables in Manipulate Michael 07/07/12 10:08pm
Re: Dynamic updating of variables in Manipulate yehuda 07/08/12 2:59pm
Re: Re: Dynamic updating of variables in Manipu... JBB 07/15/12 10:19am
Re: Re: Re: Dynamic updating of variables in Ma... JBB 07/16/12 5:00pm
Re: Dynamic updating of variables in Manipulate Jbb 07/09/12 00:54am
Re: Dynamic updating of variables in Manipulate JBB 07/18/12 5:39pm
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