CrunchDataFrames are designed to mimic the ways that data.frames are used. They should be a drop-in replacement in many places where data.frames are used.

# S3 method for CrunchDataFrame



a CrunchDataFrame


CrunchDataFrames are generated not by downloading all of the variables from a dataset, but rather only the variables that are needed by subsequent functions. So, if you create a CrunchDataFrame, and then run a linear model using lm(), only the variables used by the linear model will be downloaded.

CrunchDataFrames can be altered (that is: adding more columns, removing columns, subsetting rows, etc.) with the same [, [[, and $ syntax as data.frames.