tablecloth.api.fold-unroll
fold-byclj
(fold-by ds columns-selector)(fold-by ds columns-selector folding-function)Group-by and pack columns into vector - the output data set has a row for each unique combination of the provided columns while each remaining column has its valu(es) collected into a vector, similar to how clojure.core/group-by works. See https://scicloj.github.io/tablecloth/index.html#Fold-by
Group-by and pack columns into vector - the output data set has a row for each unique combination of the provided columns while each remaining column has its valu(es) collected into a vector, similar to how clojure.core/group-by works. See https://scicloj.github.io/tablecloth/index.html#Fold-by
unrollclj
(unroll ds columns-selector)(unroll ds columns-selector options)Unfolds sequences stored inside a column(s), turning it into multiple columns. Opposite of fold-by.
Add each of the provided columns to the set that defines the "uniqe key" of each row.
Thus there will be a new row for each value inside the target column(s)' value sequence.
If you want instead to split the content of the columns into a set of new columns, look at [[separate-column]].
See https://scicloj.github.io/tablecloth/index.html#Unroll
Unfolds sequences stored inside a column(s), turning it into multiple columns. Opposite of [[fold-by]]. Add each of the provided columns to the set that defines the "uniqe key" of each row. Thus there will be a new row for each value inside the target column(s)' value sequence. If you want instead to split the content of the columns into a set of new _columns_, look at [[separate-column]]. See https://scicloj.github.io/tablecloth/index.html#Unroll
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