#2810 sector plots

[Uwe Schneider]

Hi,
when executing the demo script on page https://gnuplot.sourceforge.net/demo_6.1/sectors.html, Fig.2: polar heatmap positioned in cartesian coordinate, gnuplot does not plot (windows).

If one changes

splot [t=0:tmax-dt:dt] [r=0:rmax-dr:dr] "++" using (t):(r):(0)

to

splot sample [t=0:tmax-dt:dt][r=0:rmax-dr:dr] "++" using (t):(r):(0)

by adding 'sample' it plots as intended.

Cheers, Uwe

G N U P L O T Version 6.0 patchlevel 2 last modified 2024-12-19
OS Name Microsoft Windows 11 Education
Version 10.0.26100 Build 26100

[Uwe Schneider]

The same is true for Fig.13 Circular discrete gauge. It only plots if sample is added after plot.

[Ethan Merritt]

Yes, but that's a difference between version 6.0 (stable) and version 6.1 (development). Version 6.0 requires the sample keyword, and the sectors demo script distributed with 6.0 does work because it does use that keyword. https://gnuplot.sourceforge.net/demo_6.0/sectors.html

Using version 6.0 to load the demo for 6.1 does not work, as you found.

The long-term goal is to make the sample keyword unnecessary everywhere, but that's work in progress (incomplete even in version 6.1).

[Uwe Schneider]

Thanks a lot.

Ethan Merritt sfeam@users.sourceforge.net schrieb am Mo., 23. Juni 2025,
18:21:

Yes, but that's a difference between version 6.0 (stable) and version 6.1
(development). Version 6.0 requires the sample keyword, and the sectors
demo script distributed with 6.0 does work because it does use that
keyword. https://gnuplot.sourceforge.net/demo_6.0/sectors.html
https://sourceforge.net

Using version 6.0 to load the demo for 6.1 does not work, as you found.

The long-term goal is to make the sample keyword unnecessary everywhere,
but that's work in progress (incomplete even in version 6.1).

---

[bugs:#2810] https://sourceforge.net/p/gnuplot/bugs/2810/ sector plots

Status: open
Priority:
Created: Mon Jun 23, 2025 02:51 PM UTC by Uwe Schneider
Last Updated: Mon Jun 23, 2025 02:54 PM UTC
Owner: nobody

Hi,
when executing the demo script on page
https://gnuplot.sourceforge.net/demo_6.1/sectors.html, Fig.2: polar
heatmap positioned in cartesian coordinate, gnuplot does not plot (windows).

If one changes

splot [t=0:tmax-dt:dt] [r=0:rmax-dr:dr] "++" using (t):(r):(0)

to

splot sample [t=0:tmax-dt:dt][r=0:rmax-dr:dr] "++" using (t):(r):(0)

by adding 'sample' it plots as intended.

Cheers, Uwe

G N U P L O T Version 6.0 patchlevel 2 last modified 2024-12-19
OS Name Microsoft Windows 11 Education
Version 10.0.26100 Build 26100

---

Sent from sourceforge.net because you indicated interest in
https://sourceforge.net/p/gnuplot/bugs/2810/

To unsubscribe from further messages, please visit
https://sourceforge.net/auth/subscriptions/