Plots vs. 3D matrices

[Joe Koski]

With Octave 2.1.55, I'm adapting a Matlab script that uses 3D matrices. I
have a plot command that looks like this

  plot(t(stopps(k,i):finps(k,i)),mps(k,stopps(k,i):finps(k,i),i))

which gives errors of the type

gnuplot> pl '/var/tmp/oct-VCIiXm' t "line 1"
                                            ^
         line 0: Can't plot with an empty y range!

If I copy t and mps into local vectors, the problem seems to disappear, at
least for that one line, but there are many such occurrences.

My questions:

1) Is this a known problem with octave-2.1.55? (or is it something else?)

2) Is my diagnosis correct? It appears the plot command doesn't want to copy
the matrix values into local vectors for plotting with gnuplot. It could
also be a parsing error caused by that extra ,i in the line.

3) Has this been corrected in later versions of octave?

Thanks.

Joe Koski



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