** Find indices of the non-zero elements. **

** I = FIND(X) returns the indices of the vector X that are **

** non-zero. For example, I = FIND(A>100), returns the indices **

** of A where A is greater than 100. See RELOP . **

** **

** **

** [ I ,J ] = FIND(X) returns the row and column indices of **

** the nonzero entries in the matrix X. This is often used **

** with sparse matrices. **

** **

** **

** [ I ,J ,V] = FIND(X) also returns a column vector of the **

** nonzero entries in X. Note that find(X) and find(X~=0) **

** will produce the same I and J , but the latter will produce **

** a V with all 1's. **

** **