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Histogram sample data on gnuplot.sourceforge.net

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  Histogram sample data on gnuplot.sourceforge.net Janis Papanagnou <janis_papanagnou@hotmail.com> - 2016-01-26 15:16 +0100
    Re: Histogram sample data on gnuplot.sourceforge.net Karl Ratzsch <mail.kfr@gmx.net> - 2016-01-26 15:31 +0100
      Re: Histogram sample data on gnuplot.sourceforge.net Janis Papanagnou <janis_papanagnou@hotmail.com> - 2016-01-26 16:17 +0100
        Re: Histogram sample data on gnuplot.sourceforge.net Janis Papanagnou <janis_papanagnou@hotmail.com> - 2016-01-26 17:35 +0100
          Re: Histogram sample data on gnuplot.sourceforge.net Jörg Buchholz <bookwood4new@freenet.de> - 2016-01-27 08:57 +0100
      Re: Histogram sample data on gnuplot.sourceforge.net sfeam <sfeam@users.sourceforge.net> - 2016-01-26 22:31 -0800
    Re: Histogram sample data on gnuplot.sourceforge.net renato.frca@gmail.com - 2018-02-05 16:34 -0800

#3171 — Histogram sample data on gnuplot.sourceforge.net

I'm looking for specific histogram samples, gnuplot code with sample data.
On http://gnuplot.sourceforge.net/demo/histograms.html there's the graphic
plots and the code, but the used data to create the plots (immigration.dat)
seems to be missing. Does someone maybe has a link to that specific data
file, or knows from which (hopefully public) source it comes from? Thanks!

Janis

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#3172

Am 26.01.2016 um 15:16 schrieb Janis Papanagnou:
> I'm looking for specific histogram samples, gnuplot code with sample data.
> On http://gnuplot.sourceforge.net/demo/histograms.html there's the graphic
> plots and the code, but the used data to create the plots (immigration.dat)
> seems to be missing. Does someone maybe has a link to that specific data
> file, or knows from which (hopefully public) source it comes from? Thanks!
> 
> Janis
> 

It's in your gnuplot installation, demo/immigration.dat

Where it is from I have no idea.

  Karl

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#3173

On 26.01.2016 15:31, Karl Ratzsch wrote:
> Am 26.01.2016 um 15:16 schrieb Janis Papanagnou:
>> I'm looking for specific histogram samples, gnuplot code with sample data.
>> On http://gnuplot.sourceforge.net/demo/histograms.html there's the graphic
>> plots and the code, but the used data to create the plots (immigration.dat)
>> seems to be missing. Does someone maybe has a link to that specific data
>> file, or knows from which (hopefully public) source it comes from? Thanks!
> 
> It's in your gnuplot installation, demo/immigration.dat

Ah, great. Got it. Thanks!

Now that I see that specific data let me add a question...
That file contains comment lines, a data heading line, and the data (numbers).
Some data positions have no numbers but a dash character ('-') instead; I'd
assume that it's interpreted as 0 (zero). Will gnuplot only in such numeric
contexts, or generally interpret that dash as 0 (zero)? In other words; if I
have data like  5 6 7 - 8 , will that always be interpreted as  5 6 7 0 8  or
might the '-' be skipped in some cases to become  5 6 7 8 ?  (I suppose it's
not skipped but want to be sure.)  I also suppose that a '-' in the header
line, say  "Austria Hungary - Belgium ..."  will be taken literally as '-';
right?

Janis

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#3174

On 26.01.2016 16:17, Janis Papanagnou wrote:
> [ http://gnuplot.sourceforge.net/demo/histograms.html ]
> Now that I see that specific data let me add a question...
> That file contains comment lines, a data heading line, and the data (numbers).
> Some data positions have no numbers but a dash character ('-') instead; I'd
> assume that it's interpreted as 0 (zero). Will gnuplot only in such numeric
> contexts, or generally interpret that dash as 0 (zero)? In other words; if I
> have data like  5 6 7 - 8 , will that always be interpreted as  5 6 7 0 8  or
> might the '-' be skipped in some cases to become  5 6 7 8 ?  (I suppose it's
> not skipped but want to be sure.)  I also suppose that a '-' in the header
> line, say  "Austria Hungary - Belgium ..."  will be taken literally as '-';
> right?

The samples on the web-page haven't shown that piece of code, but the linked
sources did. To answer my question; it's obviously controlled by the command:

  set datafile missing '-'


Janis

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#3176

On 26.01.2016 17:35, Janis Papanagnou wrote:
> On 26.01.2016 16:17, Janis Papanagnou wrote:
>> [ http://gnuplot.sourceforge.net/demo/histograms.html ]
>> Now that I see that specific data let me add a question...
>> That file contains comment lines, a data heading line, and the data (numbers).
>> Some data positions have no numbers but a dash character ('-') instead; I'd
>> assume that it's interpreted as 0 (zero). Will gnuplot only in such numeric
>> contexts, or generally interpret that dash as 0 (zero)? In other words; if I
>> have data like  5 6 7 - 8 , will that always be interpreted as  5 6 7 0 8  or
>> might the '-' be skipped in some cases to become  5 6 7 8 ?  (I suppose it's
>> not skipped but want to be sure.)  I also suppose that a '-' in the header
>> line, say  "Austria Hungary - Belgium ..."  will be taken literally as '-';
>> right?
>
> The samples on the web-page haven't shown that piece of code, but the linked
> sources did. To answer my question; it's obviously controlled by the command:
>
>    set datafile missing '-'

Without "set datafile missing" I found 4 different ways Gnuplot will 
handle this data.

plot '-' u 1:3 w lp
0   1   2   3
1   2   3   4
2   3   XYZ   5
3   4   5   6
4   5   6   7
e

XYZ or any other character (Not a Number) will be handled as missing 
data, the line on column 3 is drawing from 3 to 5.

plot '-' u 1:3 w lp
0   1   2   3
1   2   3   4
2   3   NaN 5
3   4   5   6
4   5   6   7
e

"NaN" causes a gap in the line.


plot '-' u 1:3 w lp
0   1   2   3
1   2   3   4
2   3   1/0  5
3   4   5   6
4   5   6   7
e

column 3 is 2 3 0 5 6


plot '-' u 1:3 w lp
0   1   2   3
1   2   3   4
2   3       5
3   4   5   6
4   5   6   7
e

With a blank the value from column 4 is in column 3. 2 3 5 5 6


Only "1/0" or "0" will set the value to zero. With and without "set 
datafile missing"

Version 5.0 patchlevel 1 win

set datafile missing "-"
plot '-' u 1:3 w lp
0   1   2   3
1   2   3   4
2   3   -   5
3   4   5   6
4   5   6   7
e

Gives the same than the first example, the line on column 3 is drawing 
from 3 to 5. The "-" is not setting to zero.


Jörg

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#3175

Karl Ratzsch wrote:

> Am 26.01.2016 um 15:16 schrieb Janis Papanagnou:
>> I'm looking for specific histogram samples, gnuplot code with sample
>> data. On http://gnuplot.sourceforge.net/demo/histograms.html there's
>> the graphic plots and the code, but the used data to create the plots
>> (immigration.dat) seems to be missing. Does someone maybe has a link
>> to that specific data file, or knows from which (hopefully public)
>> source it comes from? Thanks!
>> 
>> Janis
>> 
> 
> It's in your gnuplot installation, demo/immigration.dat
> 
> Where it is from I have no idea.

Historical data from the US Census Bureau
I don't have a URL for that exact file, but similar data is at

https://www.census.gov/population/www/documentation/twps0029/tab04.html

	Ethan

> 
>   Karl

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#3866

Em terça-feira, 26 de janeiro de 2016 11:16:14 UTC-3, Janis Papanagnou  escreveu:
> I'm looking for specific histogram samples, gnuplot code with sample data.
> On http://gnuplot.sourceforge.net/demo/histograms.html there's the graphic
> plots and the code, but the used data to create the plots (immigration.dat)
> seems to be missing. Does someone maybe has a link to that specific data
> file, or knows from which (hopefully public) source it comes from? Thanks!
> 
> Janis

See this: https://www.apt-browse.org/browse/debian/wheezy/main/all/gnuplot-doc/4.6.0-8/file/usr/share/doc/gnuplot-doc/examples/immigration.dat

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