gnuplot-info

[Gnuplot-info] column operation with time data

[agoniabogar <te...@gm...>]

Dear Plotters,

I hope you can help me, I have two diagrams that I would like to match and
generate the average of both the time and the value data.
...
plot "blabla.dat" u ($2+$4)/2:($6+$8)/2
...
This would be the simplest method to plot the average values both in the x
and y axis. But I have elapsed time in the x axis and it seems that the
program does not want to execute the simple column operation in the command
(regarding the time, $2 and $4 columns). The output says " empty xrange. .
."
 I used the set timefmt "%H:%M:%S" and the set xdata time commands prior to
the plot.

Many thanks in advance, 

Agoniabogar


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Re: [Gnuplot-info] column operation with time data

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

columns with time data need a special read-in function when
the dates are to be modified:
plot "blabla.dat" u (timecolumn(2)+timecolumn(4))/2:($6+$8)/2


agoniabogar wrote:
> 
> Dear Plotters,
> 
> I hope you can help me, I have two diagrams that I would like to match and
> generate the average of both the time and the value data.
> ...
> plot "blabla.dat" u ($2+$4)/2:($6+$8)/2
> ...
> This would be the simplest method to plot the average values both in the x
> and y axis. But I have elapsed time in the x axis and it seems that the
> program does not want to execute the simple column operation in the
> command (regarding the time, $2 and $4 columns). The output says " empty
> xrange. . ."
>  I used the set timefmt "%H:%M:%S" and the set xdata time commands prior
> to the plot.
> 
> Many thanks in advance, 
> 
> Agoniabogar
> 
> 
> 

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Re: [Gnuplot-info] column operation with time data

[agoniabogar <te...@gm...>]

Dear Thomas, many thanks, now it plots it in cold blood. :)

Agonia


Thomas Sefzick wrote:
> 
> plot "blabla.dat" u (timecolumn(2)+timecolumn(4))/2:($6+$8)/2
> 

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[Gnuplot-info] Time data format

[agoniabogar <te...@gm...>]

Hi all, 

I've run into the following data file:

20.04.2012 15:27	27	25	24.2	0.32
20.04.2012 15:27	27	25	24.2	0.3
20.04.2012 15:28	27	25	24.2	0.28
20.04.2012 15:28	27	25	24.2	0.26
20.04.2012 15:28	27	25	24.2	0.24
20.04.2012 15:28	27	25	24.2	0.22
.
.
.
...and I would like to plot it, by:

set xdata time
set timefmt x "%d.%m.%Y %H:%M"
p "blabla.txt" u 1:2

and it plots sg, but not the expected result. I don't know what can be the
problem.

Many thanks, Agonia



agoniabogar wrote:
> 
> 
> Dear Thomas, many thanks, now it plots it in cold blood. :)
> 
> Agonia
> 
> 
> Thomas Sefzick wrote:
>> 
>> plot "blabla.dat" u (timecolumn(2)+timecolumn(4))/2:($6+$8)/2
>> 
> 
> 

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Re: [Gnuplot-info] Time data format

[Hans-Bernhard B. <HBB...@t-...>]

On 27.04.2012 16:14, agoniabogar wrote:
> 20.04.2012 15:28	27	25	24.2	0.22

> set xdata time
> set timefmt x "%d.%m.%Y %H:%M"
> p "blabla.txt" u 1:2

You almost certainly don't want to use column 2 in that specification 
--- that's the one holding the time, because you have a blank in your 
timefmt.  You want

	plot "blabla.txt" u 1:3

instead.

Re: [Gnuplot-info] Time data format

[Telmerk <te...@gm...>]

Yes, many thanks,  I realized it after a few attempts! It works fine.
A.


2012/4/27 Hans-Bernhard Bröker <HBB...@t-...>:
> On 27.04.2012 16:14, agoniabogar wrote:
>>
>> 20.04.2012 15:28        27      25      24.2    0.22
>
>
>> set xdata time
>> set timefmt x "%d.%m.%Y %H:%M"
>> p "blabla.txt" u 1:2
>
>
> You almost certainly don't want to use column 2 in that specification ---
> that's the one holding the time, because you have a blank in your timefmt.
>  You want
>
>        plot "blabla.txt" u 1:3
>
> instead.