gnuplot-info

[Gnuplot-info] building histogram chart with multiple data files

[seb_kramm <seb...@ya...>]

Hello gnuplot user's,

I'm new here, sorry for what may be a silly question...

I was very happy to find that 4.2 had histograms charts added, however, I have a 
question about it's usage.

 From the demos, it seems that it can only build that type of chart with multicolumn 
data files. And what I have is several 2 columns data files, produced by an app, with 
a parameter setting that changes between them.

Example:

# File1 |# File 2 |# File 3 |
# x - y |# x - y  |# x - y  |
1  3.4  |1  3.6   |1  3.7   |
2  4.5  |2  2.3   |2  3.3   |
3  2.4  |3  1.1   |3  3.5   |
  ...       ...       ...

Is there a way I can build an bar chart (histogram) out of these files ?
Reconsidering the way the files are build isn't easy, as there's a lot of preliminary 
computing for each, I just can't switch easily from a setting to another.

If not, maybe that's an idea of futur feature ?
Thank you all,

Re: [Gnuplot-info] building histogram chart with multiple data files

[<HBB...@t-...>]

seb_kramm wrote:
>  From the demos, it seems that it can only build that type of chart with multicolumn 
> data files. And what I have is several 2 columns data files, produced by an app, with 
> a parameter setting that changes between them.

[...]

> Is there a way I can build an bar chart (histogram) out of these files ?

But you can quite easily combine your three files into a single one, if 
you've collected some needful tools about your work place.  Using the 
usual Unix tools, e.g., it would be as simple as:

	plot '< paste file1 file2 file3'

For more complex, use 'join' instead of 'paste', or write yourself a 
little data processing script.  And it may be preferrable to do it once, 
instead of each time you need a fresh plot:

	! paste file1 file2 file2 > files_1_2_3

Re: [Gnuplot-info] building histogram chart with multiple data files

[seb_kramm <seb...@ya...>]

Hans-Bernhard Bröker a écrit :
> seb_kramm wrote:
>> Is there a way I can build an bar chart (histogram) out of these files ?
> 
> But you can quite easily combine your three files into a single one, if 
> you've collected some needful tools about your work place.  Using the 
> usual Unix tools, e.g., it would be as simple as:
>     plot '< paste file1 file2 file3'
> 
> For more complex, use 'join' instead of 'paste', or write yourself a 
> little data processing script.  And it may be preferrable to do it once, 
> instead of each time you need a fresh plot:
>     ! paste file1 file2 file2 > files_1_2_3

Thank you for these clues, unfortunately, I am currently using MS Windows (but I'm 
planning a switch to nix ASAP !), and I don't have any of these tools natively available.

If this can be useful to others, I found these tools ported to MSW in the excellent
http://gnuwin32.sourceforge.net/ project :

See http://gnuwin32.sourceforge.net/packages/coreutils.htm

Not tried yet.

Re: [Gnuplot-info] building histogram chart with multiple data files

[<HBB...@t-...>]

seb_kramm wrote:

> Thank you for these clues, unfortunately, I am currently using MS Windows (but I'm 
> planning a switch to nix ASAP !), and I don't have any of these tools natively available.

Well now you do, don't you?