Le 20/07/2018 à 12:20, David Chèze a écrit :
Hi Pat and all,
I was looking for similar simple feature for plotting time series with
readable date time format and I can share an intermediate approach to update
the x-ticks with a call to function labxdtv(), cf linked file labxdtv.sci
<http://mailinglists.scilab.org/file/t375348/labxdtv.sci>
There's no callback function, the function is called after the plot action
and after every changes in windows size or zoom level : initial plot is like
plot2(dtnm,Donnees), with dtnm a vector of datenum values and Donnees a
matrix of related data to plot. After the figure is plot at first time or
after every changes in windows size or level of zoom, call again labxdtv, it
regraduates automatically the x-axis according to the datanum span and
convert the datenum in readable date time vector format (auto_ticks are set
to on in the function).
Would be great to have in scilab a more powerful/flexible builtin
function... :)
Sure, but it's a rather complex function. The need was reported 10 years
ago @ http://bugzilla.scilab.org/6228
labxdtv() gives a rather raw idea of the task. On it's showcase example,
ticks are every 3 months over one year:
But they are not nice:
* At this scale, major ticks should rather be on the 1st of months.
* there should not be any shift 17 => 18 => 19. This means that
subticking must be completely customized, with a polyline
superimposed to the axis, since it is irregular.
* here there is only one subtick instead of rather two (for an
automatic handling)
* etc..
So yes, a powerful function formating dates would be nice. But
implementing a really nice and useful one is definitely not trivial.
Cheers
Samuel
PS : there is presently no event triggered by zooming or panning an axes.
_______________________________________________
users mailing list
users@lists.scilab.org
http://lists.scilab.org/mailman/listinfo/users
