I have data set of financial ratios for 5 different companies during 5 years period. I will do another anaysis with the ratios but before that I want to extract the most important ratios to avoid uncessary variables in my future analysis. In order to do that I want to apply PCA into my data set but I am having trouble about preparing my dataset to apply PCA. I am noobie in matlab and also in statictics but I am working too hard to improve my skills. I would be glad if you can give me an advice where to start/how to start.
thanks in advance