从向量/矩阵或 R 中的 Dataframe 中查找索引

Question

I have data in R as follow:

data <- c(1,12,22,0,8,1,0,0)

Is there any way to index the data to find the index for element that is greater than 0? So the result will be:

1 2 3 5 6

I tried to use as.factor(data), but it will take several more step to get the result that I aim for. Thanks.

Answer 1

We can use which on a logical vector

which(data >0)
#[1] 1 2 3 5 6

Answer 2

Another option is using seq_along (but not as straightforward as the which method by @akrun )

> seq_along(data)[data>0]
[1] 1 2 3 5 6