term% cat index.txt HISTOGRAM(8) System Manager's Manual HISTOGRAM(8)
NAME
histogram - draw a histogram
SYNOPSIS
histogram [ -h ] [ -c index ] [ -r minx,miny,maxx,maxy ] [ -s scale ] [
-t title ] [ -v maxv ]
DESCRIPTION
Histogram reads numbers, one per line, from its standard input and
draws them as bars in a histogram.
Use -c to set the color index for the graph. A modulus operation on
the value keeps the color index within the available range.
Unless -h (hold) is given, histogram will exit when it reaches the end-
of-file. It will exit immediately if it is interrupted or if the exit
menu option is chosen.
-r sets the initial window rectangle coordinates.
-s sets the scaling factor.
-t sets the title displayed on a line above the histogram. The last
value read is displayed to the right of the title.
-v sets the maximum value that can be expected.
EXAMPLE
Plot a sine wave:
hoc -e 'for(i=0.0;i<20*PI;i=i+0.1) print (10+10*sin(i)), "\n"'|
histogram -t 'sin(t), 0 ⤠t ⤠20Ï' -v 20 -h
Show the Dow Jones adjusted daily closing price back to January 1,
2000:
site=http://ichart.finance.yahoo.com
hget $site'/table.csv?s=^DJI&a=00&b=1&c=2000' |
awk -F, '{print $NF}' | histogram -t DJI -v 15000 -h
SOURCE
/sys/src/cmd/histogram.c
SEE ALSO
statusbar(8)
HISTOGRAM(8)