How I make circular grid without using meshgrid or rectangle?

8 次查看（过去 30 天）
omar Alwan
omar Alwan 2014-12-10
评论： Anonymous 2018-4-11
I made circle grid by using meshgrid of X and Y.Then I took the circle formula from the rectangular grid by following this code:
>>[x,y]=meshgrid(-128:127,-128:127); %(replicates the grid vectors from -128 to 127 to produce a full grid. This gridis represented by the output coordinate arrays X and Y).
>>z=sqrt(x.^2+y.^2); % is the formula for having the circle (Matrix) >>c=(z<14); % to cutoff 14 value >>figure,imshow(c)
My question is :How I make circular grid directly instead of making square or rectangle grid and then making circular formula with cutoff???
I hope to find the solution from the members in this website
thank you

请先登录，再回答此问题。

回答（1 个）

Jos (10584)
Jos (10584) 2014-12-10
I think your approach is very straightforward. Everything I can think of right that does not generate grid points being thrown away later involves looping twice.
Moreover, your variable C needs to be rectangular if it is used by imshow ...

类别

在 Help Center 和 File Exchange 中查找有关 Surface and Mesh Plots 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by