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.
Last updated: Aug 8, 2011. A perl function that runs a Unix command and returns its exit status. Here's the source code for a Perl function I created this morning. The purpose of this function/method is to run a specific Unix command, and then return the Unix exit status of that command.