I need every 7 elements in a row to be for the first column sum; for the second column sum, for the third column min, for the fourth column max and reaped the process from the 3rd to the 48th column of the data frame, named here dataset, which has in fact 50 columns and 84 rows. I'm expected to get a data frame with 12 rows and 48 columns in which each row element is a statistics (in following repeated order by column: sum, sum, min max) of each 7 elements in each of the 84 rows. I think maybe the problem could be in the for loop for the rows i, could be?

```
k=data.frame(matrix(nrow = 12,ncol = 48));
for (i in 1:12) {
for (j in 1:12) {
k[i,4*j-3]=apply(dataset[ i:7,4*j-1], 2,sum)
k[i,4*j-2]=apply(dataset[ i:(i+7),4*j], 2,sum)
k[i,4*j-1]=apply(dataset[ i:(i+7),4*j+1], 2,min)
k[i,4*j]=apply(dataset[ i:(i+7),4*j+2], 2,max)
}
};
```

something like this?