search for: effforts

...R-help at stat.math.ethz.ch; Liaw, Andy Subject: Collapsing solution to the question discussed above: Re: [R] multi-class classification using rpart Hi, All: The variable is used to encode industries: like computer science, electronics and so on. Therefore, there is no order in them. My previous effforts indicate that grouping them according to some domain knowledge decreases the accuracy. However, using some "distance" or "entropy" is my current thought to collapse them since it is a classification problem. I am searching for some papers which discussed on this topic. Anyone...

Hi, I am trying to make a multi-class classification tree by using rpart. I used MASS package'd data: fgl to test and it works well. However, when I used my small-sampled data as below, the program seems to take forever. I am not sure if it is due to slowness or there is something wrong with my codes or data manipulation. Please be advised ! The data is described as the output from str()