How do I create of a mesh of complete circle?

I want to a mesh of perpect circle.

But, When I create a mesh it is angled.

How do I get a perfectly round mesh?

[KSSV]

Show us your code.

Try axis equal after plotting.

[Rik]

What code did you use to get this?

Also, perfectly round will not happen. Rounder than the hexagon you show should be possible.

[LSHHH]

I have no experience using matlab.

I used the basic generate mesh attached below.

https://kr.mathworks.com/help/pde/ug/generate-mesh.html

[KSSV]

You show us what exactly is your domain to be meshed. We can help you.

Answer 1

[Riccardo Scorretti]

With Matlab PDE toolbox it is possible to define a circle and mesh it. You can do it by using the GUI, or by issuing the command pdecirc. For instance:

pdecirc(0, 0, 2); % open the modeler and draw a cirle of center (0,0) and radius 2

The nasty point is that (up to my knowledge) it cannot be done programmatically = pdecirc and similar commands open the modeler.

However, in this way (after meshing) I got this image:

Well, indeed I had to set manually the axis and impose axis to be equal (use the menu Options/Axis limits and Optins/Axis equal), but this is not the point. The point is: why do you need such a mesh, and what do you want to do with it. Do you want to solve a FEM problem?

Concerning mesh generation, perhaps it may be worth to look at DistMesh: http://persson.berkeley.edu/distmesh/