mkhistogram: List or plot the histogram of a data stream (noao.proto V2.9)

Package: obsolete

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