[Gnuplot-info] How to put a particular value from the data file as lable

[sergejzr <ze...@l3...>]

Hello Dear Gnuplot wizards!

I am quite new to this topic, but I am starting to like this software.  I
have some graph in mind and need your help to vizualize it! My problem:

I would like to put a single point on the plot and to give it a special
title, so right no it works like:

plot 'testbep.dat' with points pt 7 ps 1.7  title sprintf("BEP %01.2f",0.63) 

data file 'testbep.dat':
0.6285488958990536	0.6285488958990536

What I need is to take the number 0.63 directly from the data file, means
take the 0.6285488958990536, round it to 0.63 and put into title.

Any ideas, how to do it?

And maybe you can help me to solve the second problem.

What I actually would prefer, is to place both, the curve data and the point
data into one file.

This works:
######################
set xlabel "Recall"
set ylabel "Precision"
set xrange[0.0:1.0]
set yrange[0.0:1.0]
set key inside left bottom
plot "-" with linespoints notitle,  "-" with points pt 7 ps 1.7 title "BEP
0.63"
########Data Part###########
0.10	0.8313492063492064
0.20	0.7976071784646062
0.30	0.7915549597855228
0.40	0.7928934010152284
0.50	0.7682878608145512
0.60	0.6384615384615384
0.70	0.5784858853721129
0.80	0.5454224107458466
0.90	0.5220599307333232
1	0.5
e
0.6285488958990536	0.6285488958990536
e
############################################

and generates a  http://l3s.de/~zerr/example.pdf perfect picture 

But whenever I put the data part into extra file it says "Bad datat on line
10" this is where the "e" is placed when I try to plot:
plot 'test.dat' with linespoints notitle, "-" with points pt 7 ps 1.7 title
"BEP 0.63"


Thank you very much in advance for you help!
S.Z


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