Stretto

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0 years, 14 days

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These are questions asked by Stretto

Surely there is some button I can click that simply shows all my posts/questions without having to search?

animate(plot, [fourier(f(x,t),x,w)/t,w=0..100], t=0.1..1, frames=100):

 

works fine, but use a scaling function for time(to get it to play nice) such as

 

animate(plot, [fourier(f(x,2^t),x,w)/2^t,w=0..100], t=0.1..1, frames=100):

 

and maple refuses to work well. It takes about 100 times longer if it plots at all. 2^t is just a scaling factor on f, it doesn't add any real algebraic complexity.

 

 

 

 

I'm trying to plot the fourier transform of a function(a sigmoid) and maple refuses to plot it. It seems to try to compute it symbolically then craps out because it can't reduce it to a computable form. Of course trying to do some type of numerical evaluation is impossible because it substitutes the numerical value for the transform variable.

S := x->erf(x):

plot(abs(fourier(S(x),x,w)),w=0..100):

Warning, unable to evaluate the function to numeric values in the region; see the plotting command's help page to ensure the calling sequence is correct

 

Just want to plot the transform, I do not understand why it is do difficult for maple to do numerically. It should fall back on a numerical routine instead of crapping out.

 

 

 

How does one sync two or more different animations? Ideally it would be something like display(..., synchronize=true)

Is there any way to automatically create a legend for a plot of a list of functions? The problem is, I'd rather not specify the legend and maple require the exact number so I cannot specify a generic length such as [1,2,3,4,5,6,7,8].

 

plot([f1(x), f2(x), f3(x), sin(x)*cos(x)*sin(3x^2 + cos(x))], x=1..34)

 

The point is that I do not want or care what the legend is(except the names shouldn't be long). I just want to be able to use it to select the plots easily and to be able to reference them(so the naming matters in that the order shoudl be obvious).

 

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