On Fri, Mar 26, 2010 at 3:23 AM, Ruben Moor <ruben.moor@gmail.com> wrote:

I use the following plot command

plot(tdata, vdata, '.-')

with an unexpected result (s. attached png). Some points are not
connected. If I plot with linestyle '-' you can't even see them.
Is that a known issue ? What do I do wrong ?

What is your matplotlib version? Could you share the data to test it?
On the latest matplotlib source copy ".-" works nicely with a test plot like:

plt.plot(np.random.random(100), ".-")