On 17-Jul-03 Angel wrote: > Got a vector, lets say: > a<-c(1,2,40,10,3,20,6); ># I remove values larger than 10 > a<-a[a<10] ># Do some operations on the new a "1 2 3 6" > b<-a^2 ># Now b is "[1] 1 4 9 36" ># Now I want to insert the elements I removed in a back into a and b ># so I get: ># a "1 2 40 10 3 20 6" >#and b "1 4 40 10 9 20 36"
For the above example, step-by-step: > a<-c(1,2,40,10,3,20,6); > ix<-(a<10) > b<-a[ix] > b<-b^2 > a[ix]<-b > a [1] 1 4 40 10 9 20 36 However, in this particuarly simple case it could easily be done in one go with a[a<10]<-(a[a<10])^2 > a<-c(1,2,40,10,3,20,6); > a[a<10]<-(a[a<10])^2 > a [1] 1 4 40 10 9 20 36 But if what you want to do to these numbers is much more complicated then the previous (step-by-step) method may be best. Ted. -------------------------------------------------------------------- E-Mail: (Ted Harding) <[EMAIL PROTECTED]> Fax-to-email: +44 (0)870 167 1972 Date: 17-Jul-03 Time: 12:30:19 ------------------------------ XFMail ------------------------------ ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help
