IRAF help page for package obsolete, program mkhistogram

from NOAO mkhistogram -- print or plot the histogram of a data streamUSAGEPARAMETERSDESCRIPTIONEXAMPLESTIME REQUIREMENTSBUGSUSE INSTEADSEE ALSO

mkhistogram -- print or plot the histogram of a data stream


USAGE

mkhistogram file


PARAMETERS

file

The name of the text file containing the data (may be STDIN).

nbins

The number of bins in the histogram.

z1 = INDEF, z2 = INDEF

The minimum and maximum histogram intensity. Z1 and z2 default to the data minimum and maximum.

listout = yes

List instead of plot the histogram.

device = stdgraph

The output graphics device.


DESCRIPTION

MKHISTOGRAM calculates the histogram of the data in the text file file using the parameters nbins, z1 and z2. If the z1 or z2 are undefined the image min or max is used. If listout = no, the histogram is plotted on the graphics device specified by device. Otherwise the histogram is listed on the standard output.


EXAMPLES

1. Output the histogram of data to a file.

    cl> mkhisto magsdata nbins=100 > magsdata.hst

2. Plot the histogram of data between the 12.0 and 26.0 with a binsize if 0.5 on standard graph. Notice that the extra bin will contain points for which z2 is exactly 26.

    cl> mkhist magsdat nbins=29 z1=12.0 z2=26.0 li-


TIME REQUIREMENTS


BUGS


USE INSTEAD

plot.phistogram


SEE ALSO

images.imhistogram, fields,


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dmills@noao.edu