Hi check out R-and-octave.txt on the contributed docs section of CRAN.
HTH Robin On 28 Aug 2006, at 17:50, Lord Tyranus wrote: > Hello wizards, I need to convert the following functions (prestd, > poststd, prepca) of matlab to R. Does Somebody knows how to do it. A > description of the functions is: > > prestd preprocesses the network training set by normalizing the inputs > and targets so that they have means of zero and standard deviations of > 1. > > poststd postprocesses the network training set which was preprocessed > by prestd. It converts the data back into unnormalized units. > > prepca preprocesses the network input training set by applying a > principal component analysis. This analysis transforms the input data > so that the elements of the input vector set will be uncorrelated. In > addition, the size of the input vectors may be reduced by retaining > only those components which contribute more than a specified fraction > (min_frac) of the total variation in the data set. > > Thanks in advance. > > ______________________________________________ > R-help@stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting- > guide.html > and provide commented, minimal, self-contained, reproducible code. -- Robin Hankin Uncertainty Analyst National Oceanography Centre, Southampton European Way, Southampton SO14 3ZH, UK tel 023-8059-7743 ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
