This function applies a CrunchLogicalExpression filter to a
CrunchDataset. It's a "tidy" way of doing ds[ds$var == val,].
# S3 method for CrunchDataset filter(.data, ..., .preserve = FALSE)
| .data | A |
|---|---|
| ... | filter expressions |
| .preserve | Relevant when the |
.data with the filter expressions applied.