hist2d Documentation

hist2d - Compute 2-D histogram
"hist2d" computes creates a 2-dimensional histogram from
two bands from two different files or from the same file.
The histogram is created in the form of an ISIS cube file
with the horizontal axis representing the DN values in the
first band and the vertical axis representing the DN values
of the second band.  The axes on the range from 0-255.  The
histogram data is smoothed using two 7x7 smoothing filters,
then it is scaled so that the values range from 0-100.
The percent of data used to tabulate the histograms is indicated
with the parameters, MINPER and MAXPER or alternately the absolute
min/max of the data can be input with MIN and MAX.

PROGRAMMER:  Tracie Sucharski, U.S.G.S., Flagstaff, AZ

Input cube file name
  (default extension is .cub)

NONE

Second input cube file name

--

Output cube file name

NONE

Band number to use for X-axis

1

Band number to use for Y-axis

1

Minimum percent

.5

Maximum percent

99.5

Minimum values

--

Maximum values

--

ADDITIONAL NOTES:

Parm	Description
FROM	Input cube file name. If the file extension is omitted, then ".cub" will be assumed.
FROM2	Second input cube file name. This file contains the band which will be plotted in the y-axis if the bands are not contained within one file.
TO	File containing the 8-bit representation of the 2-D histogram.
XBAND	This is the band number to be used for the x axis. This band will be taken from the file indicated in FROM.
YBAND	This is the band number to be used for the y axis. This band can be in the file indicated with FROM, or it may be located in a second file indicated with FROM2.
MINPER	The percent of data in the low end which will not be tabulated in the histogram.
MAXPER	The percent of data in the high end which will not be tabulated in the histogram.
MIN	The MIN parameter can be used to set a specific minimum value instead of calculating a minimum value using the MINPER.
MAX	The MAX parameter can be used to set a specific maximum value instead of calculating a maximum value using the MAXPER.