[R-sig-Geo] Long time listener, first time caller

[Lyndon Estes]

Hi Robert,

On my Mac the plot displays fine with no lines.

R version 2.13.1 (2011-07-08)
Platform: x86_64-apple-darwin9.8.0/x86_64 (64-bit)
[13] raster_1.8-39      sp_0.9-83

Cheers, Lyndon


On Thu, Jul 14, 2011 at 8:54 PM, Michael Sumner <mdsumner at gmail.com> wrote:
> I see the same on Windows 7 64-bit, with 32-bit R and 64bit R.
>
> There's no need for the transpose/flip btw:
>
> image(volcano)
>
> but raster graphics don't product it, so it's the underlying image C
> code (which is rect under the hood)
>
> image(volcano, useRaster = TRUE)
>
> plot(0, xlim = c(0, 1), ylim = c(0, 1))
>
> rasterImage((volcano - min(volcano, na.rm = TRUE)) /
> diff(range(volcano, na.rm = TRUE)), 0, 0, 1, 1, interpolate = FALSE)
>
> plot(0, xlim = c(0, 1), ylim = c(0, 1))
>
> rasterImage((volcano - min(volcano, na.rm = TRUE)) /
> diff(range(volcano, na.rm = TRUE)), 0, 0, 1, 1)
>
> I'd like to investigate more, but will have to wait for now.
>
> Cheers, Mike.
>
>
> On Fri, Jul 15, 2011 at 10:40 AM, Robert Hijmans <r.hijmans at gmail.com> wrote:
>>> Lines appear to be a GUI issue, went back to 2.13.0 and plot of raster
>> looks fine.
>>
>> When plotting a Raster* object, raster calls the 'image' function. spplot
>> uses 'levelplot'. Both are affected by these white lines in R 2.13.1 on
>> Windows, I think (anyone seeing this on Mac or Linux? or not seeing this on
>> Windows?). Here is a simple test:
>>
>> image(t(volcano)[ncol(volcano):1,])
>>
>> In some cases there are only lines such that it seems that there are no data
>> values. I would expect that this will be fixed soon, but I am changing
>> 'raster' so that the next version calls 'rasterImage' (which is not affected
>> and should be more efficient) in stead of 'image'.
>>
>> Please correct me if I am wrong, but I think that for now one should not use
>> R 2.13.1 on Windows (and perhaps other OSs) if you want to plot raster data.
>> Robert
>>
>>> sessionInfo()
>> R version 2.13.1 (2011-07-08)
>> Platform: i386-pc-mingw32/i386 (32-bit)
>>
>>
>> --
>> View this message in context: http://r-sig-geo.2731867.n2.nabble.com/Long-time-listener-first-time-caller-tp6585078p6585499.html
>> Sent from the R-sig-geo mailing list archive at Nabble.com.
>>
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>>
>
>
>
> --
> Michael Sumner
> Institute for Marine and Antarctic Studies, University of Tasmania
> Hobart, Australia
> e-mail: mdsumner at gmail.com
>
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-- 
Lyndon Estes
Research Associate
Woodrow Wilson School
Princeton University
+1-609-258-2392 (o)
+1-609-258-6082 (f)
+1-202-431-0496 (m)
lestes at princeton.edu