plot issues -> how to produce a mono plot? [changeset]

[Petr Mikulik]

> A changeset is attached.
> 
> Petr, please verity this works for you. I'll delay pushing it until the issue
> (reference below) with rgb2gray has been resolved.

Yes, it works.

> > > >- Actually, dashes are produced by:
> > > >	plot(x,-x,'-', x,y, '-.', x,x, '--')
> > > >which means solid, dash-dot, dash-dash. They are equivalent in postscript
> > > >to
> > > >plot ... lt 1 lc rgb ..., ... lt 5 ..., ... lt 2 ...
> > > >
> > > >If Octave uses lt 1,5,2, then it could pass the "dash" option always and
> > > >it will be compatible with Matlab's dashes.

Could you please have a look to this issue of '-.' and '--' as well?

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PM