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

[Thomas S. <t.s...@fz...>]

plot nothing (0/0 = undefined) to store the value into a variable,
then use this variable for the title of the 2nd plot:

plot 'testbep.dat' using 1:(t=$2,0/0), \
'' using 1:2 with points pt 7 ps 1.7  title sprintf("BEP %01.2f",t)

the end_of_data "e" is only needed for inline data not
for data read from a file.


sergejzr wrote:
> 
> 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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