Converts a frame to key-value representation while optionally skipping NA values. Inverse operation to h2o.pivot.
Pivot the frame designated by the three columns: index, column, and value. Index and column should be of type enum, int, or time. For cases of multiple indexes for a column label, the aggregation method is to pick the first occurrence in the data frame
h2o.melt( x, id_vars, value_vars = NULL, var_name = "variable", value_name = "value", skipna = FALSE )
x |
an H2OFrame |
id_vars |
the columns used as identifiers |
value_vars |
what columns will be converted to key-value pairs (optional, if not specified complement to id_vars will be used) |
var_name |
name of the key-column (default: "variable") |
value_name |
name of the value-column (default: "value") |
skipna |
if enabled, do not include NAs in the result (default: FALSE) |
an unpivoted H2OFrame
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