Re: [Gnuplot-info] plot by filtering some lines

[<HBB...@t-...>]

William Xu wrote:
> Hans-Bernhard Bröker <HBB...@t-...> writes:

>>> which should do the same as: 
>>>>> ,----
>>>>> | plot 'result.log' using ($4 == 1 $3 : 1/0):5 title '1 session' with linespoints
>>>>> `----
>>> right?

>> No.  Data that's not there at all (because 'awk' ate it) is not quite 
>> the same as data with infinite or undefined coordinates.

> Oh, so you mean that in ($4 == 1 ? $3 : 1/0):5, when $4 != 1, even
> (1/0):5 is a valid coordinate? 

No.  1/0 is an invalid coordinate.  But that's still not the same as the 
total absense of an entire datapoint.  An input line with invalid 
coordinates works like an empty input line, a.k.a. "blank record".  See 
"help datafile" about the effect of blank records.