misc/

ajs_pixel_plot.pro

ajs_pixel_plot, x, y [, binsize1=binsize1] [, binsize2=binsize2] [, nbins1=nbins1] [, nbins2=nbins2] [, xrange=xrange] [, yrange=yrange] [, overplot=overplot] [, ct=ct] [, color=color] [, _REF_EXTRA=_REF_EXTRA]

Plot (large number of) points as pixels (rectangles), with colour (white->black) representing density

binsize1 in optional: Size of bin in x-direction
binsize2 in optional: Size of bin in y-direction
nbins1 in optional: Number of bins in x-direction (ignored if xrange and binsize1 set; default 50)
nbins2 in optional: Number of bins in y-direction (ignored if yrange and binsize2 set; default 50)
xrange in optional: Range for plot (if not overplot) and range for histogram
yrange in optional: Range for plot (if not overplot) and range for histogram
overplot in optional: Set /overplot to overplot
ct in optional: Colour table: -1 = use current, -2 = fixed colour (color keyword), -3 (or not specified) = default (white -> black) If color keyword set, and ct != -2, generate colour table from color
color in optional: Colour to use instead of grayscale/black
_REF_EXTRA in optional: Extra keywords for plot

ajs_plot_radec, ra, dec, /nodata, xtitle='RA / degrees', ytitle='dec / degrees'

ajs_pixel_plot, ra, sin(dec / !RADEG), nbins1=200, nbins2=200, /overplot, ct=40

Sample output (click to enlarge):

History:

18 Apr 2008 Written, Anthony Smith