[Gnuplot-info] Plot value from another column above histogram bar

[dave101 <da...@ya...>]

Say I have 5 manufacturing lines.  Each week, I collect 2 quality metrics R
and S.  After week 2, I have a table like below.  I would like to graph a
clustered histogram chart using the data from the R# columns and then put
the number from the corresponding S# column above each bar.

So far I have below which can plot the S# points, but i can't make it just
put the S numbers and all of the S# points get put on the first bar in the
cluster, not on each bar in the cluster.  (i.e.  I need to use a separate
xtic for each S#.

I need the solution to be scalable -- each week I will add 2 new columns for
R and S.  So I need to be able to calculate the xtics somehow based on
number of columns?

plot "data.txt" using 2:xticlabels(1) ti col , '' using 4 ti col, '' using 3
ti col axis x1y2 with points, '' using 5 ti col axis x1y2 with points

data    R1      S1      R2      S2
line1   1000    0.2     900     0.1
line2   900     0.2     800     0.1
line3   800     0.2     700     0.1
line4   700     0.2     600     0.1
line5   600     0.2     500     0.1

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