I was poking through the viewmat code, and noticed a couple things
that might be of interest.
First, is that viewmat has a default palette, which you can see here:
load'viewmat'
viewmat i.6
Viewmat uses linear interpolation between the palette colors to
represent position in the range of values it's displaying.
If you want to see how it blends, you could do something like this:
viewmat i.60
If you want to supply your own palette, you can do that also. Palettes
are three column lists of colors, with 0 0 0 for black, 255 0 0 for
red, 0 255 0 for green, 0 0 255 for blue and 255 255 255 for white.
For example:
(255*=i.3) viewmat i.3
(255*#:i.8) viewmat i.8
Finally, getvm1_jviewmat_ generates the bitmap it uses.
For example:
0 {:: ''getvm1_jviewmat_ i.3 3
255 40959 65471
65311 8388352 16768768
16727808 16711775 16711935
The left argument is not optional, and is the palette (the default
palette for an empty left argument). Each pixel in the bitmap is one
integer. So another way to see the default palette is:
256#.inv 0 {:: ''getvm1_jviewmat_ i.6
0 0 255
0 255 255
0 255 0
255 255 0
255 0 0
255 0 255
(Note that there's a leading 1 dimension on this result, since a
bitmap is a rank 2 array. You could use {. to discard that leading
dimension.)
FYI,
--
Raul
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