Index - I
| ICSV | DataFrame.Lazy |
| If | DataFrame |
| ifilterColumn | DataFrame |
| ifoldlColumn | DataFrame |
| ifoldrColumn | DataFrame |
| imapColumn | DataFrame |
| impute | DataFrame |
| inferTypes | DataFrame |
| inferValueType | DataFrame |
| INNER | DataFrame |
| innerJoin | DataFrame |
| inputPath | DataFrame.Lazy |
| InputType | DataFrame.Lazy |
| inputType | DataFrame.Lazy |
| insertColumn | DataFrame |
| insertUnboxedVector | DataFrame |
| insertVector | DataFrame |
| insertVectorWithDefault | DataFrame |
| interpret | DataFrame |
| interQuartileRange | DataFrame |
| intPlotRanges | DataFrame |
| isGrouped | DataFrame |
| isNullish | DataFrame |
| isOptional | DataFrame |