Plotting a table of date+time pairs

Plotting a table of date+time pairs

[Michael Heerdegen]

Hi,

I want to plot two columns of an org table: the first column (the "x"
coordinate) consists of dates, the second column contains a time value
associated with each date.

It seems this is not as easy to do as I had hoped: AFAIU, for making
gnuplot interpret the "y"-value (!) as a time value I need to add
something like

  using "1:(timecolumn(2,\"%H:%M\"))"

to the gnuplot command line (it took me quite a while to find out how to
do it at all...)

And AFAIK this is only possible by tweaking
`org-plot/preset-plot-types'.  I need to add a complete new type of
plot!

Is there maybe a simpler way (I know I could add redundant columns to
the table to help org - that's not really what I want, though)?


TIA,

Michael.

Re: Plotting a table of date+time pairs

[Fraga, Eric]

Response below/inline for email Michael Heerdegen wrote:
> (original email sent 28 Nov 2024 at 02:21)
> 
> [...]
> And AFAIK this is only possible by tweaking
> `org-plot/preset-plot-types'.  I need to add a complete new type of
> plot!

You could use a gnuplot src block instead of org-plot?  It's what I do
usually as org-plot is not powerful enough for most of my plots
(although very nice for simple x-y graphs etc.).

-- 
: Eric S Fraga, with org 9.7.15-a1df10 in Emacs 31.0.50