Asking for meaning of this code of what this is. But in General this is the Romberg Integration method

Hi there i have a set of codes but it is hard to understand, i believe it is not a code hence i cannot type it out here, can i please have some explaination on the Romberg Integration in the coding, or maybe show me how can a romberg integration be done for the codes.

[Jan]

What exactly is your problem? "I have a set of codes, which are not code"?

You can find many examples for Romberg integrations in the net, e.g. in the FileExchange.