cell_df-class: 'cell_df' class
In tidycells: Read Tabular Data from Diverse Sources and Easily Make Them Tidy

The cell_df class is a subclass of tbl_df and data.frame, created in order to store cell level information.

Properties of `cell_df`

Objects of class cell_df have:

A class attribute of c("cell_df", "cells", "rc_df", "tbl_df", "tbl", "data.frame").
Two column of integer type named row and col. All entries must be positive and not NA. This represents a cell address.
A column of character type named data_type. Which can contain only numeric or character as entries. This represents the data type of the cell (classified to only two categories).
A column of character type named value. This stores value of corresponding cells.
Apart from these columns it can contain other columns. However, (row, col) together should identify the row of the cell_df uniquely.

print: Prints identifier of the class and the content of the underlying tibble.
summary: Calculates basic stats like number of rows and columns, number of characters and numeric fields, density etc.
plot: Plots (using ggplot2) the cell information as ordinary table.
as.matrix: This will transform the data back into tabular form and create a character matrix.
as.data.frame: Similar to as.matrix this will also transform the data back into tabular form.