Re: Problem with DateListPlot Aspect Ratio

• To: mathgroup at smc.vnet.net
• Subject: [mg117613] Re: Problem with DateListPlot Aspect Ratio
• From: Armand Tamzarian <mike.honeychurch at gmail.com>
• Date: Thu, 24 Mar 2011 06:30:50 -0500 (EST)
• References: <imc941\$1k1\$1@smc.vnet.net>

```On Mar 23, 6:56 pm, "Miranda, Juan" <juan.mira... at hp.com> wrote:
> Hi everyone,
>
> I have had some troubles with DateListPlot, my version of Mathematica is 8.0.1, so this is my problem.
>
> I'm creating a random time indexed list with 300 data, in order to plot the data I'm using the DateListPlot function, I want to have the PlotRange varying with an slider in order to see a larger or smaller range of data. So I wrote the next problem to exemplify what is happening, I have an Slider that changes the percentage of time I want to see from 0 to 1, there are two DateListPlots, both of them plot the same 300 data points, and have the ImageSize defined as {800,200}, the first one as the AspectRatio defined as GoldenRatio, the second one has the AspectRatio defined as Full because I want the graphic to cover the whole imagesize space. So when percentage has the value of 1 (To show 100% the time range), both graphics work as expected.  But if I move the Slider in order to select a value of percentage behind 0.7 (approx. 70%), the first graph that is not the one that I want to implement works just fine, but the second one that is the one I want to implement just show s
o!
me weird lines. I'm starting thinking that it is a bug. Can someone tell me how to correct this bug? I want to conserve the Time related ticks in the DateListPlot.
>
> Needs["Calendar`"]
> pointsnum = 300;
> percentage = 1;
> data = Transpose[{Map[(DatePlus[{2011, 1, 1}, #]) &,
>      Range[pointsnum]], RandomReal[100, pointsnum]}];
> Grid[{{Grid[{{Slider[Dynamic[percentage]], Dynamic[percentage]}}]}, {
>    Dynamic[
>     DateListPlot[data, Joined -> True, ImageSize -> {800, 200},
>      AspectRatio -> GoldenRatio,
>      PlotRange -> {{data[[1, 1]],
>         DatePlus[data[[1, 1]], (pointsnum - 1)*percentage]}, {0,
>         100}}]]
>    }, {
>    Dynamic[
>     DateListPlot[data, Joined -> True, ImageSize -> {800, 200},
>      AspectRatio -> Full,
>      PlotRange -> {{data[[1, 1]],
>         DatePlus[data[[1, 1]], (pointsnum - 1)*percentage]}, {0,
>         100}}]]
>    }}]
>
> Best.
>
> Juan

Not sure why this is happening but it seems that if you give
AspectRatio an explicit number the problem goes away:

Column[{
Row[{Slider[Dynamic[percentage], ImageSize -> Medium],
Spacer[{4, 0}], Dynamic@NumberForm[percentage, {4, 3}]}],
Dynamic[
DateListPlot[data, Joined -> True, ImageSize -> {800, 200},
ImagePadding -> {{30, 10}, {30, 10}}, AspectRatio -> GoldenRatio,
PlotRange -> {{data[[1, 1]],
DatePlus[data[[1, 1]], (pointsnum - 1) percentage]}, {0,
100}}],
TrackedSymbols :> {percentage}],
Dynamic[
DateListPlot[data, Joined -> True, ImageSize -> {800, 200},
ImagePadding -> {{30, 10}, {30, 10}}, AspectRatio -> 1/4,
PlotRange -> {{data[[1, 1]],
DatePlus[data[[1, 1]], (pointsnum - 1) percentage]}, All}],
TrackedSymbols :> {percentage}]
}, Alignment -> Center]

Mike

```

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