Thanks! That was just what I was looking for.
Jon
Joel Richardson wrote:
You can run the data through Histogram, then run the histo through
Include to keep only the bins that have at least N occurrences, then
Statistics to get the min/max pressures. Then feed your original data
through Include, using this min/max.
Joel
Jonathan Matheson wrote:
I can get a good image that way but I am looking for a way to do this
automatically. I am using it for a computational fluid dynamics
simulation so the pressure range is always different depending on the
shape and other parameters. Also, my cfd program calls dx once it
writes the dx files so the user can immediately see the image.
Because the pressure range depends on the individual problem you'd
have to specify the range each time which is not very practical. My
range is so big now that the good data (data outside the shape
surface) appears all one colour because it occupies a very small
range of the colourmap. If I use 'statistics' to find the max and min
it gives me the garbage values from within the shape. I need to
somehow use the boundary of the shape dx file to exclude the data
inside of it and then search for the max and min outside. I can't
find a way to split up the 'data' or get rid of part of it. I can
exclude all of it easily enough but that's certainly no help.
Thanks,
Jon
Chris Pelkie wrote:
Using only the Colormap Editor (once you install Colormap and a
Color, double-click the Colormap module), you can modify the
normally linear colormap to any shape you want. You can also type in
min and max values right there to constrain what gets colored (it
invalidates the data outside your range, just like Include). So you
can pretty quickly trim outliers, or leave them in, but by adding
new control points, make a colormap that pushes all the colors down
and up to wrap around the 'good' data.
Note the 'histogram' function of Colormap Editor can help identify
where the 'good' data is.
To see all the above, you have to run the data flow from your
imported field into the 1st input of Colormap. Also run this same
output to the 1st input of Color. Then run the 1st output of
Colormap to 2nd input of Color. Samples show this clearly.
On Aug 9, 2005, at 9:47 PM, Jonathan Matheson wrote:
I am importing 2 3D dx files into my .net program. One of them
contains pressure values in the ‘data’ field. The other shape file
has only ‘positions’ and triangular ‘connections’ fields with no
data. The pressure values within the shape are garbage and I need
to make my program ignore them. The problem is that outside of the
shape the pressures are all pretty close but inside they are
really high and really low. As a result of this my colour map does
not show the pressure differences outside the shape. I can
manually set the max and min values through the ‘include’ function
but dx is automatically called from another program and that is
not an option. I am looking for a way to search for the max and
min pressure values while ignoring those that are inside the
shape. If I could do that I can set those values in the ‘include’
function and everything will display properly.
Thanks,
Jon
_______________________________
Chris Pelkie
Scientific Visualization Producer
622 Rhodes Hall, Cornell Theory Center
Ithaca, NY 14853 (607) 254-8794
