plotting date on x-axis

[Simon]

Thank you very much Francis,


wow - that is a fast answer! That seems to be a good approach either... 
even if this does not work just the way you posted it.
I now got a vector of strings by these four rows...

------------------------
dat=[string(d(1))+ "." + string(m(1))+ "." + string(y(1))];
for j=2:length(y)
  dat = [dat; string(d(j))+ "." + string(m(j))+ "." + string(y(j))];
end
-------------------------

... but when I put it as: ...

----------------------------
plot(all(:,1), [all(:,2), all(:,3), all(:,4)])
h = gca()
h.x_ticks.labels = dat
----------------------------


... it still is said that the submatrix is defined incorrectly.

The structure of the x_ticks.labels-vector (v) seems to be like:

----------------------
v(1) = ["ticks location labels"]   // one string - probably the keyword 
or header of the vector
v(2) = [1; 2; 3; ... ; 9]                  // floats - probably the 
locations of the ticks
v(3) = ["1"; "2"; "3"; ... ; "9"]       // strings - probably the labels 
of the ticks
-------------------------


yet, I could not rebuild that vector with my dates, but I will post it, 
if I succeed...


so long,
Simon