Guide/tutorial to design of experiment in Matlab?

I have the statistics tool box and very little know how on matlab. I have seen a few things explaining how I can form a test matrix using either a full factorial or a fractional factorial. This has enabled me to form a nice looking matrix but, I have no idea how to input my factors/levels and once I have done my experiments how to input my response data into Matlab and get the main effects plots or interaction plots. Basically, the help files show me quick demos but, nothing which links these parts together. I really need a guide as to what I need to do, any suggestions?

[Sivakumaran Chandrasekaran]

practise on arrays first.. after that try to write code like sum of first five numbers. learn if and for loop alone. then you can apply yours own problems

[Geoff Hayes]

Peter - please clarify what you mean by factors/levels. What problem are you attempting to solve and how are "factors" used? If you are referring to specific functions within the Statistics Toolbox, then please describe them here. Also, what are the main effects plots or interaction plots? Are these tools within MATLAB or something that you need to create?

[Peter Wilson]

I have now found the mbcmodel which seems to order an easy method of constructing a test matrix. Hopefully, using this model I can get all the interactions.

Factors - Experimental variables: temperature, speed, force Levels - Values of these factors: Speed 250 and 500 rpm

Main effects plot and interaction plots are fuctions within matlab.

The idea is I want to run a minimal set of experiments which will narrow down the main factors.