ref: 550b6d1aad832fc6155c776a8192cb457d2b1175
dir: /sys/man/8/histogram/
.TH HISTOGRAM 8 .SH NAME histogram \- draw a histogram .SH SYNOPSIS .B histogram [ .B -h ] [ .B -c .I index ] [ .B -r .I minx,miny,maxx,maxy ] [ .B -s .I scale ] [ .B -t .I title ] [ .B -v .I maxv ] .SH DESCRIPTION .I Histogram reads numbers, one per line, from its standard input and draws them as bars in a histogram. .PP Use .B -c to set the color .I index for the graph. A modulus operation on the value keeps the color index within the available range. .PP Unless .B -h .RI ( hold ) is given, .I histogram will exit when it reaches the end-of-file. It will exit immediately if it is interrupted or if the .I exit menu option is chosen. .PP .B -r sets the initial window .I rectangle coordinates. .PP .B -s sets the .I scaling factor. .PP .B -t sets the .I title displayed on a line above the histogram. The last value read is displayed to the right of the title. .PP .B -v sets the maximum .I value that can be expected. .SH EXAMPLE Plot a sine wave: .IP .EX 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 ≤ 20π' -v 20 -h .EE .PP Show the Dow Jones adjusted daily closing price back to January 1, 2000: .IP .EX 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 .EE .SH SOURCE .B /sys/src/cmd/histogram.c .SH SEE ALSO .IR statusbar (8)