#2534 Documentation of "set xtics"

[Anonymous]

The keyword "add" seems to only make a difference if it is followed by an explicit list of tic positions in brackets, e.g.

    set xtics add (2.3,6,7,9.5)

I guess that's the intended behaviour? The help however says it can always be added:

set xtics
 ....
             {add}
             {  autofreq
                      | <incr>
                      | <start>, <incr> {,<end>}
                      | ({"<label>"} <pos> {<level>} {,{"<label>"}...) }

As this

 set xtics 4 add (-7,0,3,9)

actually works as expected, I guess the right syntax description should be

~~~
set xtics
....
{ autofreq
| <incr>
| <start>, <incr> {,<end>} }
{{add} ({"<label>"} <pos> {<level>} {,{"<label>"}...) }
~~~</label></level></pos></label></end></incr></start></incr>

[Ethan Merritt]

Cannot reproduce.
For example the following sequence works for me:
~~~
set xtics ("π" pi)
set xtics add 0,2,6
plot [0:6] sin(x)
~~~

What gnuplot version are you using?
What is the exact sequence of commands that is failing?

[Karl Ratzsch]

Hm, just gave it a try myself. You can (that's not clear from the docs, but I find it quite handy now) add a list of explicit tic positions to an invocation with an increment, in the same command.

plot [0:6] sin(x)
set xtics 2 add (1,0.6,3.9); rep

You cannot add one incremental invocation to a previous one. They overwrite each other. That's not perfectly clear from the docs, but I don't know why I'd want to do it in the first place. ?

set xtics 2; rep 
set xtics add pi/2; rep # tics at 0,2,4,6 disappear

You can add explicit tic positions to incremental tic positions, and vice versa

set xtics 1; rep
set xtics add (pi); rep
set xtics add 0.6;rep

, and you can always add more explicit tic positions to the already defined.

set xtics add (2.3); rep

Seems all in perfect working order.