Create a data frame from a sequence of tuples containing row key, column key and a value

Create a data frame from a sequence of objects and functions that return row key, column key and value for each object in the input sequence. ## Parameters - `values` - Input sequence of objects - `colSel` - A function that returns the column key of an object - `rowSel` - A function that returns the row key of an object - `valSel` - A function that returns the value of an object