plotKML coerce levels ?

Florence--
I might misunderstand your question, but I think that your problem is the
type in your SpatialPixelsDataFrame, not your call to plotKML.  From what
you describe, I assume that the values in your SpatialPixelsDataFrame are
numeric.  If you want a specific color legend, you need to use a factor
instead of a numeric.

If your values in the SpatialPixelsDataFrame take exactly
{2,4,10,30,60,100}, you may need to convert the values from numeric to a
factor with factor().  If your values are numeric but take any value (e.g.,
from 0 to 100), you may want to convert it to a factor using cut() with
c(0,2,4,10,30,60,100).

I hope that this helps and points you in the right direction.
Tom


On Tue, Aug 6, 2013 at 8:48 AM, TROUDE Florence
<FTroude at air-rhonealpes.fr>wrote:

Dear list,

I use the plotKML library to plot maps of simulation results (pollen maps).
It's quite great but I'd like to have some colors at some defined levels
such as :
2 -> white
4 -> green
10 -> yellow
30 -> orange
60 -> red
100 -> black

my object is a SpatialPixelsdataframe or a SpatialGriddataframe.

When I use plotKML with for instance data range from 0 to 10, I don't
menage to coerce the levels/colors of the map :
the color_scale always fit to the min/max of the data and don't fellow the
levels (2,4,10,30,60,100)...
I have tried colour_scale, colour, levels options but it doesn't work.

Does anyone have encountered the same problem and fixed it ?

Regards,

Florence

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