I have the 1-band raster colour table plugin which has some very nice options 
for colour maps however the greyscale raster I am using has very large negative 
values to denote areas where there are no data compared to a normal range of 
say 0-40 for the areas were there are data.  Is there a way of telling the 
plugin to ignore these very large negative values when making the scale or 
somehow deal with them so they are recognised as separate from the proper data 
so they can all be given a single 'no data' colour?
Actually the power distribution method initially seems to do just what I want, 
it gives the no data large negative number a single colour and produces a nice 
gradation in the other numbers BUT they are shown as black and white rather 
than in colour for some reason so I end up with a blue + black and white image.


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