The function returns the submatrix obtained deleting the row "rowdeleted" and the column "column_deleted". The matrix avoid taking elements with row_deleted or column deleted ad indices. The submatrix ...

In this approach, we pass get_dummies() a column in a data frame and it creates a full matrix of zero-one values. In other words, it gives us a matrix with 103 rows (because we have 103 rows in the ...

We see above that X is a single column of numbers (amount of fly ash in each batch of concrete). The numbers on the left are just the Python index (very row in a Python array has a row number, or ...