Re: Missing/invalid data points

[Petr M. <mi...@ph...>]

I have noticed that if there is at least one blank line at the end of a 
datafile, then
         set table; plot 'bla1'
shows a dummy undefined point at the end:

#Curve 0 of 1, 5 points
#x y type
  1  10  i
  2  20  i
  2  30  i
  4  40  i
  0  0  u

That dummy "0 0 u" does not appear for
         splot 'bla1'
It probably does not hurt anything?

***

> In the non-($n) case, the plot should be the same as if you remove these
> junk lines from the datafile.

I think datafiles should not have "stupid" values, but, amazingly, gnuplot 
does not ignore such lines; try this:

0.1 10 1.111
0.2 20 2.222
0.3 bla 3.333
0.4 40 4.444

gnuplot>  set table; plot 'bla1'

#Curve 0 of 1, 4 points
#x y type
  0.1  10  i
  0.2  20  i
  2  0.3  i
  0.4  40  i

gnuplot>  set table; splot 'bla1'

#Surface 0 of 1 surfaces

#IsoCurve 0, 4 points
#x y z type
  0.1  10  1.111 i
  0.2  20  2.222 i
  2  0  0.3 i
  0.4  40  4.444 i

Even that this has no relation to "set datafile missing", the "replacement" 
values are strange -- 'help missing' even says "erroneously".

Further, the first example in 'help missing' + its description seems to be 
wrong.


---
PM