| Re: block fill image [message #62621 is a reply to message #62344] |
Tue, 30 September 2008 08:04   |
kfish
Messages: 1
Registered: September 2008
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Junior Member |
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On Sep 5, 10:29 am, Bennett <juggernau...@gmail.com> wrote:
> On Sep 5, 9:50 am, "ben.bighair" <ben.bigh...@gmail.com> wrote:
>
>
>
>
>
>> On Sep 5, 7:58 am, maffie <matthias.demuz...@geo.kuleuven.be> wrote:
>
>>> Dear all,
>
>>> I would like to make an image, presenting cluster classes on the x-
>>> axes, and different variables on the Y-axes. Each combination (Xi,Yi)
>>> should be represented by ablock, whereby its color fill should
>>> represent a standard deviation, and with the mean written in the box
>>> as text.
>
>> Hi,
>
>> I think you could simply create the image and populate each pixel with
>> the standard deviation. Then the trick is to use an image display
>> routine that will use nearest neighbor interpolation - try David
>> Fanning's TVSCALE or Liam Gumley's IMDISP for example. You'll want to
>> carefully control the color scheme for which each of these gives you
>> plenty of options. The subsequent annotations can be done using
>> XYOUTS like this..
>
>> dy = (y[1]-y[0])/2.
>> for i = 0L, nx-1 do begin
>> for j = 0L, ny-1 do begin
>> XYOUTS, x[i], y[j] + dy, stddev[i,j], ALIGN = 0.5, ....
>> endfor ; j loop
>> endfor ; i loop
>
>> You may want to add an offset in the Y direction for the image - that
>> is what the dy is about.
>
>> Cheers,
>> Ben
>
> polyfill is another IDL procedure that you may be interested in if you
> are wanting to make blocks of different colors on theplot- Hide quoted text -
>
> - Show quoted text -
I'm just learning IDL and am having a heck of a time figuring out how
to make just a simple block plot. What I'd like to do, for example,
is plot temperature by depth on the x and y and have another variable,
fish growth, color coded in each temp-depth cell. I'm assuming I can
do this with polyfill or contour, but haven't been able to figure out
how. I'd appreciate any help I can get on this. Thanks!
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