gnuplot-beta

Advice on boxes plot and setting xrange with a time axis

[Daniel F. <boy...@gm...>]

Hello,

I have a plot boxes plot which is value of something at every month of  
the year. I want to change the xrange of the plot,

http://www.boyfarrell.com/forums/gnuplot/plot-bars.pdf

I want to be able to see all the box in the plot range (January is  
clipped and December is too large), this means I needs to set the  
xrange to be slightly larger than the data range i.e. from Jan-1 to Dec 
+1. However, my xaxis is time in months numbers, 1,2,3 etc... I have  
tried a few methods of setting the xrange and the xtic placement my  
can't get it to work.

Here is the data and the plotting script, can anybody help?
http://www.boyfarrell.com/forums/gnuplot/bars.txt
http://www.boyfarrell.com/forums/gnuplot/plot-bars.txt

Regards,

Dan.

Re: Advice on boxes plot and setting xrange with a time axis

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

set timefmt "%m.%Y"
set xrange ["12.1999":"01.2001"]
set timefmt "%m"
plot 'bars.txt' using 1:2 title 'A'

explanation:
you can't set the xrange to 'december one year before' with
timefmt "%m" because there is no way to give the year, and
month numbers <= 0 are not allowed.

note:
gnuplot starts counting time from the 'beginning of epoch',
so if you have only month numbers in your datafile, it automatically
chooses year 2000.

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Re: Advice on boxes plot and setting xrange with a time axis

[Daniel F. <boy...@gm...>]

Hello Thomas,

I have made the changes you suggested but it now clips on both sides!  
It this a bug?

Have a look here,

http://www.boyfarrell.com/forums/gnuplot/bars2.txt
http://www.boyfarrell.com/forums/gnuplot/plot-bars2.txt
http://www.boyfarrell.com/forums/gnuplot/plot-bars2.pdf

Regards,

Dan.

On 14 May 2008, at 19:17, Thomas Sefzick wrote:

>
> set timefmt "%m.%Y"
> set xrange ["12.1999":"01.2001"]
> set timefmt "%m"
> plot 'bars.txt' using 1:2 title 'A'
>
> explanation:
> you can't set the xrange to 'december one year before' with
> timefmt "%m" because there is no way to give the year, and
> month numbers <= 0 are not allowed.
>
> note:
> gnuplot starts counting time from the 'beginning of epoch',
> so if you have only month numbers in your datafile, it automatically
> chooses year 2000.
>
> -- 
> View this message in context: http://www.nabble.com/Advice-on-boxes-plot-and-setting-xrange-with-a-time-axis-tp17228309p17237732.html
> Sent from the Gnuplot - Dev mailing list archive at Nabble.com.
>
>
> -------------------------------------------------------------------------
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Re: Advice on boxes plot and setting xrange with a time axis

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

you forgot to 'set xdata time'

your plotfile should read:

...
set xdata time
set timefmt "%m.%Y"
set xrange ["12.1999":"01.2001"]
plot 'bars2.txt' using 1:2 title 'A'

or

...
set xdata time
set timefmt "%m.%Y"
set xrange ["12.1999":"01.2001"]
set timefmt "%m"
plot 'bars.txt' using 1:2 title 'A'

you may adjust the xrange more precisely:

...
set timefmt "%d.%m.%Y"
set xrange ["15.12.1999":"18.12.2000"]
set timefmt "%m.%Y"
plot 'bars2.txt' using 1:2 title 'A'

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Re: Advice on boxes plot and setting xrange with a time axis

[Daniel F. <boy...@gm...>]

Hello,

Right, thanks for that the range is correct. It is possible to set the  
time labels to be abbreviated month names?

Changing the second set timefmt "%m" doesn't make any difference?

Do I need to play with set xtics to do this?

Dan


On 15 May 2008, at 11:25, Thomas Sefzick wrote:

>
> you forgot to 'set xdata time'
>
> your plotfile should read:
>
> ...
> set xdata time
> set timefmt "%m.%Y"
> set xrange ["12.1999":"01.2001"]
> plot 'bars2.txt' using 1:2 title 'A'
>
> or
>
> ...
> set xdata time
> set timefmt "%m.%Y"
> set xrange ["12.1999":"01.2001"]
> set timefmt "%m"
> plot 'bars.txt' using 1:2 title 'A'
>
> you may adjust the xrange more precisely:
>
> ...
> set timefmt "%d.%m.%Y"
> set xrange ["15.12.1999":"18.12.2000"]
> set timefmt "%m.%Y"
> plot 'bars2.txt' using 1:2 title 'A'
>
> -- 
> View this message in context: http://www.nabble.com/Advice-on-boxes-plot-and-setting-xrange-with-a-time-axis-tp17228309p17250154.html
> Sent from the Gnuplot - Dev mailing list archive at Nabble.com.
>
>
> -------------------------------------------------------------------------
> This SF.net email is sponsored by: Microsoft
> Defy all challenges. Microsoft(R) Visual Studio 2008.
> http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/
> _______________________________________________
> gnuplot-beta mailing list
> gnu...@li...
> https://lists.sourceforge.net/lists/listinfo/gnuplot-beta

Re: Advice on boxes plot and setting xrange with a time axis

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

> Right, thanks for that the range is correct. It is possible to set the  
> time labels to be abbreviated month names?

you had this command already in your first example:
set format x "%b"

> Changing the second set timefmt "%m" doesn't make any difference?
timefmt specifies how data are read in.

to get month-tics do:

set xtics 60*60*24*31
unset mxtics

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