Hi there, say, I have 100 matrices (m1,m2,...,m100) which I want to combine in a list. The list, thus, shall contain the matrices as components. Is it necessary to mention all 100 matrices in the list() command? I would like to use just the first and last matrix or something similar. Best, Holger -- View this message in context: http://www.nabble.com/Creating-a-list-by-just-using-start-and-final-component-tp23691673p23691673.html Sent from the R help mailing list archive at Nabble.com.
Romain Francois
2009-May-24 09:07 UTC
[R] Creating a list by just using start and final component
Hollix wrote:> Hi there, > > say, I have 100 matrices (m1,m2,...,m100) which I want to combine in a list. > The list, thus, shall contain the matrices as components. > > Is it necessary to mention all 100 matrices in the list() command? I would > like to use just the first and last matrix or something similar. > > Best, > Holger >Hi, you can do something like that: matrices <- ls( pattern = "m[0-9]+" ) res <- lapply( matrices, get ) Romain -- Romain Francois Independent R Consultant +33(0) 6 28 91 30 30 http://romainfrancois.blog.free.fr
Wow, thank you so much! Where can I learn such creative approaches? Best, Holger Romain Francois-2 wrote:> > Hollix wrote: >> Hi there, >> >> say, I have 100 matrices (m1,m2,...,m100) which I want to combine in a >> list. >> The list, thus, shall contain the matrices as components. >> >> Is it necessary to mention all 100 matrices in the list() command? I >> would >> like to use just the first and last matrix or something similar. >> >> Best, >> Holger >> > Hi, > > you can do something like that: > > matrices <- ls( pattern = "m[0-9]+" ) > res <- lapply( matrices, get ) > > Romain > > -- > Romain Francois > Independent R Consultant > +33(0) 6 28 91 30 30 > http://romainfrancois.blog.free.fr > > ______________________________________________ > R-help at r-project.org 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. > >-- View this message in context: http://www.nabble.com/Creating-a-list-by-just-using-start-and-final-component-tp23691673p23692141.html Sent from the R help mailing list archive at Nabble.com.