Thank you Dr. Burns, I tried that, but I don't think it accomplishes what I intended.
Let me try to explain better. I have myMatrix myMatrix2 (8000 by 20) (8000 by 1) myMatrix2 is the variance across the rows of myMatrix. I want to subset myMatrix to include only variances under a specific value ( i.e. a value I choose based a cutoff from myMatrix2) So I want to output a new myMatrix that includes only those variances under a specific value. thank you, On 4/4/06, Patrick Burns <[EMAIL PROTECTED]> wrote: > > I think you want something like: > > myMatrix2 <- myMatrix[ myMatrix[,1] < myVector, ] > > You may find the subscripting section of chapter 1 of > S Poetry to be useful. > > Patrick Burns > [EMAIL PROTECTED] > +44 (0)20 8525 0696 > http://www.burns-stat.com > (home of S Poetry and "A Guide for the Unwilling S User") > > mark salsburg wrote: > > >I have two objects, one matrix and one vector. > > > >I want to use my vector to subset certain values out of my matrix. > > > >For example: > > > >I want to tell R, to select out all rows in myMatrix into a new myMatrix2 > IF > >that corresponding row is less than a 0.5 in myVector. > > > >So: > > > >myMatrix = a matrix of 8000 by 20 > >myVector = vector of 8000 > > > >myMatrix2 = a matrix of < 8000 by 20 (based on selection criteria in > >myVector) > > > >I hope this makes sense.. > > > > [[alternative HTML version deleted]] > > > >______________________________________________ > >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 > > > > > > > > > [[alternative HTML version deleted]] ______________________________________________ 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
