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.
Leukemia, blood and immune system cancers. Leukemia is a cancer found in early blood-forming cells and is most often a cancer of the white blood cells. Leukemia is often classified as either chronic (progresses slowly) or acute (progresses quickly). Four main types of leukemia exist. Different types have different prognoses and treatments.