[R] Compact sums in functions definitions

Alessandro Antonucci alessandro at idsia.ch
Thu Jun 15 18:55:15 CEST 2006

I'm trying to make more compact the definition
of a function as for example:

f <- function(x) 2/x+3/x

by simply defining the array of coefficients

arr = c(2,3)

and setting:

g <- function(x) sum((arr/x))

Everything seems to work fine because the values returned 
by f and g result coincident for different values of their
argument, but when I try to plot the function g using:

x = seq(-1,1,.01)

I receive the errors/warnings:

>Error in xy.coords(x, y, xlabel, ylabel, log) : 
>        'x' and 'y' lengths differ
>In addition: Warning message:
>longer object length
>        is not a multiple of shorter object length in: b/t 
>Execution halted

Any idea about that?



Alessandro Antonucci
Dalle Molle Institute for Artificial Intelligence (IDSIA)
at Idsia			e-mail: alessandro at idsia.ch
Galleria 2			web:   idsia.ch/~alessandro
Via Cantonale			mobile:   +39 339-567-23-28
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Manno - Lugano			fax:       +41 58-666-66-61
Switzerland			skype: alessandro.antonucci

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