[R] Multiple counters in a single for loop

[Jérémie Juste]

Of course I meant

>If the length of var1 should not be 0 so

stopifnot(length(var)>0)

On Sun, Aug 26, 2018 at 9:10 AM, Jeremie Juste <jeremiejuste using gmail.com>
wrote:

> Duncan Murdoch <murdoch.duncan using gmail.com> writes:
>
> >> for ( i in 1:length(var1)){
> >
> > This is generally a bad idea:  if length(var1) == 0, it does the wrong
> > thing, since 1:0 is c(1L, 0L).  Better to use
> >
> > for ( i in seq_along(var1) ) {
> >
>
>
> granted. One should check the validity of their variables before using
> them but I argue that seq_along does not protect you from the
> unexpected behaviour.
>
> If the length of var1 should not be 0 so
>
> stopifnot(length(var)==0)
> for ( i in 1:length(var1)){
>
>     elem1 <-var1[i]
>     elem2 <-  var2[i]
>
> }
>



-- 
Jérémie Juste

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