A function is a self-contained computation that accepts a number of arguments as input and returns some value. Awk has a number of built-in functions in two groups: arithmetic and string functions. Awk also provides user-defined functions, which allow you to expand upon the built-in functions by writing your own. Nine of the built-in functions can be classified as arithmetic functions. Most of them take a numeric argument and return a numeric value. . If no seed is specified, uses time of day. Returns the old seed. work the same way, taking a single argument that is the size of an angle in radians and returning the cosine or sine for that angle. (To convert from degrees to radians, multiply the number by takes two arguments and returns the arctangent of their quotient. The expression uses the natural exponential, which is also known as base- returns the natural number 2.71828, the base of the natural logarithms, referred to as function gives the inverse of the function, the natural logarithm of function takes a
Products & Services
Math Calculation Software
Math calculation software is used to perform mathematical calculations. These programs provide general core calculations as well as graphical analysis that can be used in science, engineering and technology.
Arithmetic Logic Units (ALU)
Arithmetic logic units (ALU) perform arithmetic and logic operations on binary data inputs. In some processors, the ALU is divided into two units: an arithmetic unit (AU) and a logic unit (LU).
Digital Panel Meters
Digital panel meters measure and display processes and electrical variables via an alphanumeric digital readout.
Digital timers keep track of timing, either to trigger an action or to start timing once triggered by an action, or both.
Pushbutton switches are mechanical switches defined by the method used to activate the switch. The activation method is typically in the form of a plunger that is pushed down to open or close the switch.
Topics of Interest
Here are some of MATLAB's functions and commands.
MATLAB INPUT/OUTPUT FUNCTIONS AND COMMANDS
clc clears the Command Window
disp(string) displays an array or string
The built-in string functions are much more significant and interesting than the numeric functions. Because awk is essentially designed as a string-processing language, a lot of its power derives from...
There are also several commercial versions of awk. In this section, we review the ones that we know about. Mortice Kern Systems (MKS) in Waterloo, Ontario (Canada) supplies awk as part of the MKS...
A2.1 Sines and Cosines
The archetype of a smooth periodic signal is the sinusoid (Figure A2.1), typically written as the product of the angular frequency ? and time t. The two closely related...
With user-defined functions, awk allows the novice programmer to take another step toward C programming by writing programs that make use of self-contained functions. When you write a function...