plotting step graph...

[Přemysl Vrba]

Hi,

I have problem wiht plotting step graph. I want to plot something like this...

plot ([1 2 3], [2 1 3], "L")

... and always there is this errors:

octave:69> plot ([1 2 3], [2 1 3], "L")
error: plot: properties must appear followed by a value       ))))1
error: evaluating if command near line 58, column 6
error: evaluating if command near line 57, column 4
error: evaluating if command near line 55, column 2
error: evaluating if command near line 54, column 7
error: evaluating while command near line 41, column 5
error: evaluating if command near line 28, column 3
error: called from `__plt__' in file `/usr/share/octave/3.0.2/m/plot/__plt__.m'
error: evaluating assignment expression near line 187, column 9
error: called from `plot' in file `/usr/share/octave/3.0.2/m/plot/plot.m'

))))1 - This doesn't depends on any value. Everytimes I vant to plot step 
graph, this errors occured.

Is this feature disabled?

Thank you.

Přemysl Vrba