plot dataFile with points replaced with serial number of the data entry

[awim...@gmail.com]

that is a confusing header so i will explain what i want to achieve.

contents of file.dat

1 2
2 3
4 9
1 9

now i want to plot the data file but instead of points or circles or
stars showing at those co-ordinates i want to print the serial number
of the points as they appear in the file.
for example at the co-ordinate (1,2) i want to output a "1" in the
plot and at the co-ordinate (1,9) i want to output a "4" in the plot.

in matlab the corresponding command is

text(x,y,"blahblah");

i tried to tinker around in gnuplot using the set label command

set label "1" at 1,2

but that command by itself does not show the 1 immediately.

any help in this regard please ...

[sfeam]

awim...@gmail.com wrote:

> that is a confusing header so i will explain what i want to achieve.
>
> contents of file.dat
>
> 1 2
> 2 3
> 4 9
> 1 9
>
> now i want to plot the data file but instead of points or circles or
> stars showing at those co-ordinates i want to print the serial number
> of the points as they appear in the file.
> for example at the co-ordinate (1,2) i want to output a "1" in the
> plot and at the co-ordinate (1,9) i want to output a "4" in the plot.

plot 'file.dat' using 1:2:(sprintf("%d",column(0))) with labels

[awim...@gmail.com]

On Apr 2, 5:01 am, sfeam <sf...@users.sourceforge.net> wrote:
>
>     plot 'file.dat' using 1:2:(sprintf("%d",column(0))) with labels
>

wow ... you are a god sent help :D thanks so so much for this