melt: Convert an object into a molten data frame.

In reshape2: Flexibly Reshape Data: A Reboot of the Reshape Package

Convert an object into a molten data frame.

Description

This the generic melt function. See the following functions for the details about different data structures:

Usage

melt(data, ..., na.rm = FALSE, value.name = "value")

Arguments

data	Data set to melt
...	further arguments passed to or from other methods.
na.rm	Should NA values be removed from the data set? This will convert explicit missings to implicit missings.
value.name	name of variable used to store values

Details

• melt.data.frame for data.frames

• melt.array for arrays, matrices and tables

• melt.list for lists

See Also

cast

reshape2 documentation built on Nov. 12, 2025, 9:06 a.m.