[R] Multiply List by a Numeric

[Peter Ehlers]

Try

lapply(abc, function(x) x*3)

Peter Ehlers

Brigid Mooney wrote:
> I apologize for what seems like it should be a straighforward query.
> 
> I am trying to multiply a list by a numeric and thought there would be a
> straightforward way to do this, but the best solution I found so far has a
> for loop.
> Everything else I try seems to throw an error "non-numeric argument to
> binary operator"
> 
> Consider the example:
> 
> a <- 1
> b <- 1:2
> c <- 1:3
> abc <- list(a,b,c)
> To multiply every element of abc by a numeric, say 3, I wrote a for-loop:
> 
> for (i in 1:length(abc))
> {
> abc[[i]] <- 3*abc[[i]]
> }
> 
> Is this really the simplest way or am I missing something?
> 
> Thanks!
> 
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> 
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