[R] How can I find negative items from a vector with a short command?

[Pascal Oettli]

Hi,

The solution can be easily found on Internet.

By the way, the following does what you are looking for:

 > f[f<0]

Regards,
Pascal


On 05/08/2013 10:54 AM, jpm miao wrote:
> Hi,
>
>     I have a vector f with some negative columns. I remember that there is
> an easy expression that can find out negative items. Can someone tell me
> how I can do it?
>
>     It seems to be
>     f[i such that f[i]<0 ...]
>
>     Thanks,
>
> Miao
>
>> d<-1:7
>> f<-(-2)^d
>> f
> [1]   -2    4   -8   16  -32   64 -128
>
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