Re[2]: [Gnuplot-bugs] Gnuplot 4.0 Win32 crashes on plot from file

[Uwe Z. <uw...@kt...>]

Hi Hans-Bernhard,

thanks for this incredibly fast reply!
Yes I mixed up versions, partly because

  set datafile separator

is not listed in the help, nor in the list of options when you write

  set

on a Gnuplot 4 command line either...

See my second message a minute ago, I solved the problem by using the
datafile separator again...

   Uwe.
   

Tuesday, June 1, 2004, 1:35:53 PM, you wrote:

HBB> On Tue, 1 Jun 2004, Uwe Zimmermann wrote:

HBB> [...]
>> plot          \
>>      '030910alogg.csv' \
>>         every 1:::0::0 \
>>         using ($1<4700? $1/60.0-60.0:1/0):($2) \
>>           '"%*[^"]",%lf,%lf,"%*[^"]",%lf,%lf,"%*[^"]",%lf,%lf'\

HBB> That's 6 %lf specifiers...

>> but adding another column to the format specifier crashes Gnuplot on
>> Win32 (WinXP sp1+updates):
HBB> [...]
>>   
>> "%*[^"]",%lf,%lf,"%*[^"]",%lf,%lf,"%*[^"]",%lf,%lf,"%*[^"]",%lf,%lf'\

HBB> Now it's 8 %lf specifiers, and that's the cause of the problem.  None of
HBB> gnuplot's plot styles uses more than 7 'using' specifiers, so the format
HBB> string isn't expected to contain more than 7 instances of %lf.  You should
HBB> replace the %lf for those columns you aren't going to actually use by
HBB> %*lf, which parses a number but then ignores it.

HBB> So the real bugs are two-fold: this limitation should be documented in
HBB> 'help using', and exceeding the limit should yield an error message rather
HBB> than crash gnuplot.  I'll see how this can be fixed.

>> Earlier I was able to plot this same datafile with GnuPlot 3.7x where
>> the column separator could be redefined to be a comma instead of a
>> whitespace...

HBB> You're mixing up versions here, I think.  I'm quite positive none of the
HBB> officially released 3.7x versions had such an option; i.e. yours must have
HBB> been a modified one.  gnuplot 4.0, OTOH, does have this option.  See "help
HBB> separator".