go-hist

simple go program to draw histograms

Installation

go get github.com/xigh/go-hist

Documentation

Usage:

  ./hist [options...] <file>

  -endian="little": endianess: [little, big]
  -gather="max": data gathering: [max, avg]
  -height=1000: image height
  -hmargin=10: horizontal margin
  -length=2147483647: max number of lines
  -lspace=0: space between lines
  -lwidth=1: line width
  -out="out.png": output filename
  -skip=0: number of entry to skip
  -type="text": datatype: [i8, u8, i16, u16, i32, u32, f32, f64, text]
  -vmargin=10: vertical margin
  -width=0: force image width [overrides line width]

Examples

Files can be binary files, such as raw audio track:

./hist --type i16 --length 2000000 --width 3000 --out audio.png audio.raw
scanning input
c=2000000 min=-32768.000000 max=32767.000000 avg=0.233254 zero=32768.00, vpl=671.14 [3000x1000]
generating background
processing image
audio.png saved 9192709px

Files can also be floats in text format:

head data.txt
1.35
1.50
1.09
0.73
1.59
1.43
1.21
1.11
1.11
0.68

./hist data.txt 
scanning input
c=1418 min=0.150000 max=33.670000 avg=4.360035 zero=0.00, vpl=1.00 [1438x1000]
generating background
processing image
out.png saved 179241px

Bugs

Yes.