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.
However, the following things can lead to some types of leukemia, including AML: 1  Blood disorders, including polycythemia vera, thrombocythemia, and myelodysplasia. 2  Certain chemicals (for example, benzene)  Certain chemotherapy drugs, including etoposide and drugs known as alkylating agents.