Re: Slow carpet plots (octave 2.9.12 CVS/gnuplot)

[John W. Eaton]

On 14-Jun-2007, A. Scottedward Hodel wrote:

| The first time the above m-file is run, there is a stream of errors  
| from gnuplot.  However, the second time the script is run the plot  
| appears correctly on the screen.  Is  this a gnuplot issue, or an  
| octave-gnuplot interface issue?  (Or is  this an octave on Mac issue?)
| 
| octave:1> carpetExample
| 
| gnuplot> plot "-" using ($1):($2) title "" with lines linestyle 1 ,  
| "-" using ($1):($2) title "" with lines linestyle 2 , "-" using ($1): 
| ($2) title "" with lines linestyle 3 , "-" using ($1):($2) title ""  
| with lines linestyle 4 , "-" using ($1):($2) title "" with lines  
| linestyle 5 , "-" using ($1):($2) title "" with lines linestyle 6 ,  
| "-" using ($1):($2) title "" with lines linestyle 7 , "-" using ($1): 
| ($2) title "" with lines linestyle 8 , "-" using ($1):($2) title ""  
| with lines linestyle 9 , "-" using ($1):($2) title "" with lines  
| linestyle 10 , "-" using ($1):($2) title "" with lines linestyle 11 ,  
| "-" using ($1):($2) title "" with lines linestyle 12 , "-" using ($1): 
| ($2) title
| [snip]
| using ($1):($2) title "" with lines linestyle 245 , "-" using ($1): 
| ($2) title "" with lines linestyle 246 , "-" using ($1):($2) title ""  
| with lines linestyle 247 , "-" using ($1):($2) title "" with lines  
| linestyle 248 , "-" using ($1):($2) title "" with lines linestyle  
| 249 , "-" using ($1):($2) title "" with lines linestyle 250 ;
| 
|                                        ^
|           line 0: invalid complex constant

I'm fairly sure thsi si a bug in gnuplot.  See this thread:

  
http://www.nabble.com/Gnuplot-garbage-in-octave-prompt-tf3715276.html#a10398198

Can nsomeone please add this topic to the FAQ?  I suspect it is going
to come up a lot.

jwe