Description. Return the matrix obtained by converting all the variables in a data frame to numeric mode and then binding them together as the columns of a matrix. Factors and ordered factors are replaced by their internal codes.
There are four main types of leukemia â acute lymphoblastic leukemia (ALL), acute myeloid leukemia (AML), chronic lymphocytic leukemia (CLL) and chronic myeloid leukemia (CML) â as well as a number of less common types.here are four main types of leukemia â acute lymphoblastic leukemia (ALL), acute myeloid leukemia (AML), chronic lymphocytic leukemia (CLL) and chronic myeloid leukemia (CML) â as well as a number of less common types.
The most common types of leukemia are: 1  acute lymphocytic leukemia (ALL). 2  ALL is the most common type of leukemia in children. 3  It also affects adults, especially those age 65 and older.he most common types of leukemia are: 1  acute lymphocytic leukemia (ALL). 2  ALL is the most common type of leukemia in children. 3  It also affects adults, especially those age 65 and older.