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 second type of classification is by type of white blood cell affected: 1  Lymphocytic leukemia. 2  This type of leukemia affects the lymphoid cells (lymphocytes), which form lymphoid or lymphatic tissue. 3  Lymphatic tissue makes up your immune system. This is the most common type of leukemia in young children. 2  ALL can also occur in adults. 3  Acute myelogenous leukemia (AML). 4  AML is a common type of leukemia. 5  It occurs in children and adults. 6  AML is the most common type of acute leukemia in adults. 7  Chronic lymphocytic leukemia (CLL).