#4198 2D Plot issue

[Vivek Ramakant Dabholkar]

Following equation does not produce a closed figure:;

The figure does not close, plotting bug may be? It should be a square

plot2d([(x/4)^98+(y/4)^98=1], [x,-50,50], [y,-50,50])$

[Gunter Königsmann]

does it help to increase nticks?

[Vivek Ramakant Dabholkar]

It does not seem to help.

Vivek R. Dabholkar

[Jaime E. Villate]

The relevant option here is sample, and not nticks. Changing the default sample from 50 to 51 works:

plot2d([(x/4)^98+(y/4)^98=1], [x,-50,50], [y,-50,50],[sample,51,51])$

but this in fact shows a bug in the implicit-plot option of plot2d which remains to be be solved. Thanks for the bug report.

[Robert Dodier]

I see that commit [ 5cf6012 ] changed the default value of sample, which is enough to correct the problem reported by OP. I know that there is more to do about the implicit plot sampling topic, but let's close this report and wait for additional reports about any problems detected post-5cf6012.