Question

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.

Answer 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.