Hi all,

I have got two data.frames:

```
x <- c(4,8,10)
group <- c(1,2,3)
threshold <- data.frame(group,x)
threshold
# group x
# 1 4
# 2 8
# 3 10
x <- c(3,4,5,8,8,9,9,9,10)
group <- c(1,1,1,2,2,2,3,3,3)
values <- data.frame(group, x)
values
# group x
# 1 3
# 1 4
# 1 5
# 2 8
# 2 8
# 2 9
# 3 9
# 3 9
# 3 10
```

I'm looking for a way/formula/command that provides a dataframe with the sums of instances of values greater than or equal to my thresholds for the respective groups. The result should look like this:

```
# group x
# 1 2
# 2 3
# 3 1
```

I can do a group-sorted list of values greater than or equal to a single shared threshold (i.e 3):

```
aggregate(values[,-1], by = list(values$group),
function(x) sum(x >= 5, na.rm = TRUE))
```

but not for different thresholds for each respective group.

Thanks.