Re: [Gnuplot-info] Multiple string concatenation after title using column(n) function

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

your plot command doesn't really work because you loose the first line,
due to the columnheader(2) option which interprets the first line as
a text line, not as a data line.

a 'plot nothing' to set a variable containing the values you want to have
in the key should do the job:

plot "OUT.txt" using \
0:(my_title="m = ".stringcolumn(2)." C = ".stringcolumn(3)." b =
".stringcolumn(4) , 0/0) \
every ::0::0 notitle, \
"" index 0 using 1:5:7 title my_title with yerrorbars


AceStrider1 wrote:
> 
> Hi All,
> 
> I am trying to set a title on the legend based on data from multiple
> columns.
> 
> for instance the file name is out.txt:
> 
> #N	        m 	C   	b	A       	B       	STDEV_A     	STDEV_B     
> 100000     	1 	0.1 	0	0.020280	0.232320	4.457500E-04	1.335500E-03
> 1000000    	1 	0.1 	0	0.020740	0.232260	1.425000E-04	4.222800E-04
> 10000000   	1 	0.1 	0	0.020800	0.231650	4.512800E-05	1.334100E-04
> 100000000  1 	0.1 	0	0.020740	0.231890	1.425300E-05	4.220400E-05
> 
> I am plotting using the following:
> 
> set log x
> set xrange [ 10000 : 1000000000]
> set title "Albedo"
> plot "OUT.txt" index 0 using 1:5:7  title  column(2) with yerrorbars 3
> 
> 
> 
> This works, but I am having a difficult time combining say column 2, 3,
> and 4 as in
> "m = ".column(2)." C = ".column(3)." b = ".column(4)
> 
> Does anyone have any idea?
> 
> Thank,
> Adan
> 
> 
> 

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