I have a dataframe with multiple samples collected from different individuals looking like
| ID | Subject | Week |
|---|---|---|
| ID01 | S01 | Week_2 |
| ID02 | S01 | Week_4 |
| ID03 | S01 | Week_5 |
| ID04 | S02 | Week_3 |
| ID05 | S03 | Week_2 |
| ID06 | S03 | Week_4 |
| ID07 | S04 | Week_1 |
| ID08 | S04 | Week_4 |
| ID09 | S04 | Week_5 |
I want to filter out the subjects and samples without both Week_4 and Week_5 collection time points using dplyr to have
| ID | Subject | Week |
|---|---|---|
| ID01 | S01 | Week_2 |
| ID02 | S01 | Week_4 |
| ID03 | S01 | Week_5 |
| ID07 | S04 | Week_1 |
| ID08 | S04 | Week_4 |
| ID09 | S04 | Week_5 |
at the end.