how can i get a matrix information in matlab?

i have a function ; how can i get a matrix information in matlab? i get all the second derivative

[Steven Lord]

I'm not sure I understand your question. Can you clarify what you mean when you say "get a matrix information"? What type of information do you want to get?

[elham kreem]

this matrix his elements are the second derivative for any function as the location such as L11 L12 L13 L21 L22 L23 ... and his symbol is I , also this matrix is symatric , and has code in matlab but i cann't apply it .

[Birdman]

Still not clear.

[Steven Lord]

I agree with Birdman, your clarification still doesn't give me a clear picture of what you're trying to do. Start at the beginning and assume we don't know anything about the problem you're trying to solve (because we don't.) It's okay to write a couple paragraphs; we don't charge by the word for Answers posts :)