gnuplotメモ

久々に使うと絶対に忘れているので、思い出す用のメモ。
随時追加していきます。

設定

セパレータ変更

gnuplot> show datafile separator
        datafile fields separated by whitespace
---
gnuplot> set datafile separator ","

日付

gnuplot> show timefmt
        Default format for reading time data is "%d/%m/%y,%H:%M"
---
gnuplot> set xdata time
gnuplot> set timefmt "%Y/%m%d %H:%M:%S"  # as 2022/01/02 01:23:45

図のラベル

gnuplot> show xlabel
        xlabel is "", offset at (character 0, 0, 0) textcolor lt -1
gnuplot> show ylabel
        ylabel is "", offset at (character 0, 0, 0), rotated by -270 degrees in 2D plots textcolor lt -1
---
gnuplot> set xlabel "Date"
gnuplot> set ylabel "DiskFreeSpace[GB]" 

レンジの変更

gnuplot> show xrange
        set xrange [ * : * ] noreverse nowriteback  # (currently [-10.0000:10.0000] )
gnuplot> show yrange
        set yrange [ * : * ] noreverse nowriteback  # (currently [-10.0000:10.0000] )
---
gnuplot> set xrange ["1/1/1970 00:00":"2/1/1970 00:00"]
gnuplot> set yrange ["0":"1000"]

描画

直線を書く

gnuplot> fConstLine(x)=10
gnuplot> plot fConstLine(x) with lines  # (x=10の線を引く)

メモリ

gnuplot> show xtics format
...
          labels are justified automatically, format "% h" and are not rotated,
...
---
gnuplot> set xtics format "%m/%d %H:%M"

オプション値

timefmt

• %Y/%m/%d
• %H:%M:%S
• %B -> 月名(December)
• %b -> 月名の3文字省略(Dec)
• %j -> 1年の何日目か(1-365)
• %s -> 1970/01/01 00:00:00 からの秒数