I'm working on a fairly simple Matlab script but am having troubles trying to figure out what is really happening behind the scenes. I'm working with an API for in house software to play with seismic data. I was given a template from one of the developers to work with to develop our own filter.
The main command that has me stumped pretty much is "y = filter(b, a, x)" where X is a full trace of a variable length (depending on the value contained in NSamples in C++).
a = [1 k1*(1+k2) k2] and b = [k2 k1*(1 + k2) 1]
What is happening in the filter command eludes me and I'm having troubles trying to figure out how to work with it in C++ without having to try and include a Matlab library in the template. The documetnation on "filter" is somewhat helpful, but I'm having troubles trying to get my head around it, so I guess what I'm looking for is mainly an explanation as to what "filter" is doing with the information given.