[R-lang] apply through a list

[Joan Bresnan]

Are you looking for lapply?
lapply                 package:base                 R Documentation

Apply a Function over a List or Vector

Description:

     'lapply' returns a list of the same length as 'X', each element of
     which is the result of applying 'FUN' to the corresponding element
     of 'X'.

     'sapply' is a "user-friendly" version of 'lapply' by default
     returning a vector or matrix if appropriate.

     'replicate' is a wrapper for the common use of 'sapply' for
     repeated evaluation of an expression (which will usually involve
     random number generation).

Usage:

     lapply(X, FUN, ...)

     sapply(X, FUN, ..., simplify = TRUE, USE.NAMES = TRUE)




On 5/16/07, Michael Cysouw <cysouw at eva.mpg.de> wrote:
> a general question, not specific to linguistics...
>
> I have a (large) set of same-size matrices M1,M2,M3,... which I
> stored in a list. How do I apply a function over the same position of
> all matrices? For example, take the sum M1+M2+M3+...
>
> I have not found any "apply" like variant that would do the trick.
> Any suggestions?
>
> best
> michael
>
>
> —————————————————————————
> Michael Cysouw
>
> Department of Linguistics
> Max Planck Institute for Evolutionary Anthropology
> Deutscher  Platz 6
> D-04103 Leipzig
>
> Room: U 1.14
>
> phone:    +49 (0) 341 35 50 316
> fax:          +49 (0) 341 35 50 333
> home:       +49 (0) 341 22 59 488
> mobile:      +49 (0) 172 18 33 507
> e-mail:       cysouw at eva.mpg.de
> homepage:  http://www.eva.mpg.de/~cysouw/
> —————————————————————————
>
>
>
> _______________________________________________
> R-lang mailing list
> R-lang at ling.ucsd.edu
> https://ling.ucsd.edu/mailman/listinfo.cgi/r-lang
>


-- 
Joan Bresnan
Stanford University
http://www.stanford.edu/~bresnan/