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From: michael partensky on 7 Dec 2009 01:59
This worked:

VerticalSlider[Dynamic[maxy], {0.1, 4}, Appearance -> "LeftArrow"];
SetOptions["Plot", PlotRange -> {{-Pi, Pi}, {-maxy, maxy}}];
p = Dynamic[Plot[Cos[x], {x, -Pi, Pi}]];
Row[{ver, p}]

On Sat, Dec 5, 2009 at 6:35 AM, Nasser M. Abbasi <nma(a)12000.org> wrote:

> ver 7
>
> I think this is an expected behavior which can be explained by some expert,
> but I found it really strange.
>
> The following 2 pieces of code _look_ that they should be equivalent, but
> one work as expected, and the other do not work as one might expect it to
>
> ------- code 1 -----------------
> ver = VerticalSlider[Dynamic[maxy], {0.1, 4}, Appearance -> "LeftArrow"];
> SetOptions[Plot, PlotRange -> {{-Pi, Pi}, {-maxy, maxy}}];
> p = Dynamic[Plot[Cos[x], {x, -Pi, Pi}]];
> Row[{ver, p}]
>
>
> ---- code 2, works as expected ----------------
> ver = VerticalSlider[Dynamic[maxy], {0.1, 4}, Appearance -> "LeftArrow"];
> p = Dynamic[Plot[Cos[x], {x, -Pi, Pi}, PlotRange -> {{-Pi, Pi}, {-maxy,
> maxy}}]];
> Row[{ver, p}]
>
>
> I simply moved the PlotRange options and set it as a default option using
> SetOptions.
>
> btw, writing Dynamic(a)SetOptions[...] did not help. Also doing
> Dynamics(a)maxy
> did not help.
>
> My thinking of why this is so, is that SetOptions is processed by the
> kernel, not the front end, and so the fact that maxy is Dynamic is lost as
> the kernel do not know about Dynamcis only the front end. or something
> along
> these line?
>
> Is there a way to make SetOptions work with Dynamics as if the options were
> part of the Plot command itself?
>
> --Nasser
>
>
>
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