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Re: listplot and plot of the same function display in different scale...
*To*: mathgroup at smc.vnet.net
*Subject*: [mg51647] Re: listplot and plot of the same function display in different scale...
*From*: Bill Rowe <readnewsciv at earthlink.net>
*Date*: Wed, 27 Oct 2004 23:43:09 -0400 (EDT)
*Sender*: owner-wri-mathgroup at wolfram.com
On 10/27/04 at 1:54 AM, sean_incali at yahoo.com (sean kim) wrote:
>let's say you want to take a few points from an interploating
>function and ListPlot it. and then show it together with the graph
>object from Plot.
>so...
>solution = NDSolve[{y'[t] == -y[t], y[0] == 1}, {y}, {t, 0, 7}];
>g0 = Plot[Evaluate[y[t] /. solution], {t, 0, 7}, DisplayFunction ->
>Identity]; g1 = ListPlot[Flatten[Table[Evaluate[y[t]/.solution],
>{t, 0, 7, 0.05}]],PlotStyle -> PointSize[0.015], DisplayFunction ->
>Identity];
>Show[g0, g1, DisplayFunction -> $DisplayFunction]
>will show two plots in one graph, but plots have their own axis
>scale. the Plot[] object seems to be shrunk in scales due to
>ListPlot[] object having more points. (due to being tabled)
>How do i fix this so that both Plot have same axis scales? ( I want
>to show dots from ListPlot to overlay on top of Plot graph. )
A simple solution would be to retain the value of the independent variable for the ListPlot, i.e., redefine g1 as:
g1 = ListPlot[Flatten/@Table[{t,Evaluate[y[t]/.solution]}, ...
An alternative solution would be to replace ListPlot with the ScaledListPlot function in Graphics`Graphics`. Then g1 would become
g1 = ScaledListPlot[Flatten[Table[Evaluate[y[t]/.solution],
{t, 0, 7, 0.05}]],PlotStyle -> PointSize[0.015],
DisplayFunction -> Identity, ScaleFunction->{.05(#-1)&, #&}];
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