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.
User Defined Function. Below we will look at a program in Excel VBA that creates a User Defined Function. Excel has a large collection of functions. In most situations those functions are sufficient to get the job done. If not, you can create your own function called User Defined Function or custom Excel function. You can access a User Defined Function just like any other Excel function. We want to create a function called SUMEVENNUMBERS that finds the sum of the even numbers of a randomly selected range.