Thread: Problems plotting in 3 dimensions

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Hi,
    reference previous email. Attachments attached to this one.

Apologies

F M Salte

Hi,
         Problems plotting in 3 dimensions

Apologies, if I'm off target but gnuplot-bugs seems to be unusable!

System:  Slackware 13.1;  gnuplot 4.4

I am enclosing a number of scripts which demonstrate one or more
problems when working with gnuplot.

The *1* examples demonstrate simple examples of drawing single lines
in 3 dimensions.

The *2* examples demonstrate one or more problems when attempting to
draw families of lines.

I have tried to make the examples self explanatory.
The images created demonstrate the different ways in which incorrect
output is produced.

I hope you can help resolve these problems.

Regards

Frank Salter

Am 18.06.2010 16:35, schrieb Frank M Salter:
> The *1* examples demonstrate simple examples of drawing single lines
> in 3 dimensions.
>
> The *2* examples demonstrate one or more problems when attempting to
> draw families of lines.
>
> I have tried to make the examples self explanatory.

Sorry, but I have to say that didn't quite work out.  There are no 
explanations whatsoever in those examples.  "Produces strange results" 
doesn't really count as an explanation.

> The images created demonstrate the different ways in which incorrect
> output is produced.

They demonstrate nothing without knowing what you expected to happen 
instead.

On Friday 18 June 2010 07:35:20 am Frank M Salter wrote:
> Hi,
>          Problems plotting in 3 dimensions
> 
> Apologies, if I'm off target but gnuplot-bugs seems to be unusable!
> 
> System:  Slackware 13.1;  gnuplot 4.4
> 
> I am enclosing a number of scripts which demonstrate one or more
> problems when working with gnuplot.
> 
> The *1* examples demonstrate simple examples of drawing single lines
> in 3 dimensions.
> 
> The *2* examples demonstrate one or more problems when attempting to
> draw families of lines.

I cannot figure out what it is about your plots that you consider to
be a problem.  exp_100 and exp_200 appear to produce identical results,
although their titles claim that exp_100 "produces expected result"
and exp_200 "differs from exp_100".

The others ... there is no explanation of what you expect, so it's
hard to evaluate whether the plot is or is not conforming to that
expectation.  For example, exp_211 produces a very nice looking plot
although the chosen yrange is 20 times larger than necessary.

> I have tried to make the examples self explanatory.
> The images created demonstrate the different ways in which incorrect
> output is produced.
> 
> I hope you can help resolve these problems.

Please explain what exactly are "these problems".

	Ethan

> 
> Regards
> 
> Frank Salter
> 
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-- 
Ethan A Merritt
Biomolecular Structure Center,  K-428 Health Sciences Bldg
University of Washington, Seattle 98195-7742

Hi, Frank

I guess that in exp_210, exp_211, command as below causes curiosity.

  dummy b, u

If you leave it alone, b defined as parametric variable should have 
default range [-10:10]. So, iteration [b = 1 : 500 : 1] does not work 
correctly. Please comment it out and try again.

Sicerely,
Namio MATUDA

> Hi,
>      reference previous email. Attachments attached to this one.
>
> Apologies
>
> F M Salte
>
>
>
> ------------------------------------------------------------------------------
> ThinkGeek and WIRED's GeekDad team up for the Ultimate
> GeekDad Father's Day Giveaway. ONE MASSIVE PRIZE to the
> lucky parental unit.  See the prize list and enter to win:
> http://p.sf.net/sfu/thinkgeek-promo
>
>
>
> _______________________________________________
> gnuplot-beta mailing list
> gnu...@li...
> https://lists.sourceforge.net/lists/listinfo/gnuplot-beta

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On Wednesday 23 June 2010 11:45:30 pm 松田七美男 wrote:
> Hi, Frank
> 
> I guess that in exp_210, exp_211, command as below causes curiosity.
> 
>   dummy b, u
> 
> If you leave it alone, b defined as parametric variable should have 
> default range [-10:10]. So, iteration [b = 1 : 500 : 1] does not work 
> correctly. Please comment it out and try again.

Good point.
Explicitly resetting a parametric dummy variable inside a plot command
could indeed lead to confusion.

On the other hand, the plot produced by deleting "dummy b,u" is
the same as the plot produced by leaving that command in place while
adding "set yrange [0:5]".  So another possible confusion is what
to expectat from auto-scaling a parametric plot.

	Ethan

Thread: Problems plotting in 3 dimensions

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