问题
I have the following data:
1 3215
2 321
...
31_60 59
60+ 32
I would like to generate histogram using gnuplot and put the value of bar on top of it.
Here is the gnuplot command I tried to create histogram:
set style data histogram
set xtics rotate
plot 'file.dat' using 2:xtic(1)
Can someone tell me how to add values on top of the bars generated?
I found the following link related histogram (http://gnuplot-tricks.blogspot.com/2009/10/more-on-histograms.html), but didnt get what its doing exactly.
回答1:
With this as some sample data file Data.dat:
1 10
2 20
3 15
4 16
5 19
6 5
You could run this script to display boxes and the corresponding value of that box above it:
set key off
plot 'Data.dat' with boxes fill pattern 1, '' u 1:($2 + 0.5):($2) with labels
Notice the u 1:($2 + 0.5):($2) where the 0.5 specifies how much the value is above the box.
回答2:
using 0 works well with xtic().
plot 'file.dat' using 2:xtic(1) with histogram, '' using 0:2:2 with labels
回答3:
Suppose I have the following data.dat file
"Method 1" 99.63 9.13
"Method 2" 97.35 10.85
"Method 3" 97.16 13.76
"Method 4" 95.16 15.56
I can get the following bar graph plot with values at the top of the bar with following line of commands in gnuplot:
reset
set terminal postscript eps size 3.5,2.62 enhanced color font 'Helvetica,20' lw 2
set output 'StackOverflow.eps'
set style fill solid 1.00
set style histogram clustered gap 1
set style data histograms
set yrange [0:120]
set xtics norangelimit font ",8"
set ytics norangelimit font ",8"
set xlabel "X-Axis" font "Helvetica,10"
set ylabel "Y-Axis" font "Helvetica,10"
set key font ",8"
set key width -8
xoffset=0.17
yoffset=0.03
plot 'data.dat' using 2:xtic(1) with histogram title "Parameter 1", ' ' u 3 with histogram title "Parameter 2", ' 'u 0:2:2 with labels font "Helvetica,10" offset -0.9,0.5 title " ", ''u 0:3:3 with labels font "Helvetica,10" offset 0.9,0.5 title " "
Bar graph Plot with values at top of the bar
来源：https://stackoverflow.com/questions/5460937/gnuplot-histogram-how-to-put-values-on-top-of-bars