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Very simple mesh is OK. triangle mesh, 1st order. But I hope I can set number of divisions on edges and do local refinement.

Does anyone know a good and free FEM 2-D mesh generator? I found so many materials while using google. I am wondering if some one can recommend me a good one. Thanks very much.

sorry for the ambiguity in my statement. You can see from my privious post, I know how to solve this using the method you gave, but since too many elements and too many points need to be determined,this is a little time consuming. I want to find a simpler way to do it. Anyway, thank all for...

It is tsearch

I found a build in function in matlab to solve this problem. Thank you for your kind help. I appreciate it.

I am sorry I did not present the question clearly. I Use matlab to generate the codes.I am doing 2 dimensional case and the basic element is triangle.what rb1957 talked about is one dimensional case. using the same idea proposed by rb1957,we can determine which element the point belongs to.(for...

I mean given a coodinate (x,y),how to determine the element number e so that (x,y) is inside this element. And a mistake in my quesion post above. e should denote the element number,not the local node number. thx again.

In 2-D case, I got all the node coordinates and I also know the matrix n(i,e),where the value of n(i,e)is global node number, i is local node number, and e is the local node number. Given a point with coordinate (x,y).How to determine which element this point belongs to? Thanks very much!