In this test, a tall, thin tube holds a sample of your blood. The speed at which the red blood cells fall to the bottom of the tube is measured. Inflammation can cause abnormal proteins to appear in your blood. These proteins cause your red blood cells to clump together.
From Wikipedia, the free encyclopedia. A user-defined function (UDF) is a function provided by the user of a program or environment, in a context where the usual assumption is that functions are built into the program or environment. 1 BASIC language.
SAS/IML software has many useful built-in functions that generate matrices: You can create matrices as a result of a function call. Scalar functions such as LOG or SQRT operate on each element of a matrix, whereas matrix functions such as INV or RANK operate on the entire matrix. You can also create a row vector by using the index operator (:).