Defining dynamic limit for a list plot

Question

Helly everybody,

I will try to keep this as simple as possible.

1. I have a function which looks like this:

   Min[T_, E_, D_] := Module[ ..... List = {...} ];
   

In any case this function gives me a list that looks like this {1,2, 1, 4,5, 2,1} etc. (Actually D determines the number of entries in this list)

2. I use Listplot to plot this list.

   ListPlot[Min[T, E, D], PlotRange -> {Automatic, {0,  0.5}}]
   

3. I use Manipulate to be able to manipulate any of these 3 Variables.

   Manipulate[ListPlot[Min[...], {T, 1, 20}, {D, 10, 20}, {E, 1, 20}]
   

   Everything worked perfectly and dandy, but I ran into one problem. E has a dynamic limit that changes when I change D or T and few other factors.

4. So in order to be able to calculate the dynamic limit ofE, I had to write a few new lines in the old Min.

   So now it looks something like this:

   Min[T_, E_, D_] := 
     Module[Emax = T + D  + a; List = {...}];   
   

   where a is a variable only used in that function

Even though Emax is getting calculated correctly, I just cannot use it outside of the function.

When I plug it into the Manipulate stuff like this:

ListPlot[Min[...], {T, 1, 20}, {D, 10, 20}, {E, 1, Emax}] 

the code does not know what Emax is.

Any ideas what I can do?

I need to use a variable from inside a function as limit for a Manipulate.

Answer 1

You can try something like this:

Manipulate[emax = Quotient[max, 3]; ListPlot[Prime[Range[emax]]], {max, 10, 20}]

Manipulate allows ; separated statements before the one that produces the output and treats all the variables as dynamic