User Manual LW120
highest precedence; (multiply) and / (divide) come second; + and -
have the lowest precedence. Parentheses may be used to change the
order of precedence. The following table summarize the mathematical
expressions and their respective abbreviated commands that can be
used with the Equation Editor.
Equation Editor Operands
^
Raise to the power
*
Multiply
/
Divide
+
Add
Ä
Subtract
(
)
Parentheses
e
Base of natural Logarithm
r
Horizontal wavelength in points
x(*)
base IO logarithm of x
Typing Equations
If you remember from your old high school studies, the simplest curve
of Y as a function of X is defined by the equation Y=aX+b. You can
use the same “technique” to generate straight lines with the Equation
Editor. Assuming first that p=0, try this:
Ampl(p)=1000
Press [Preview] and see what you get. Of course, you get an
uninteresting line that runs parallel to the X-axis. Now, lets give the
line some angle by typing:
Ampl(p)=-2*p+2000
Press [Preview] and see that the line slopes down. It may still be not
pi (
π
)
Circumference of unit-diameter circle
pe
f
I/per
omg (
Ω
) 2*
π
/ per
amp
Amplitude in units of points or seconds
sin(x)
The sine of
cos(x)
The cosine of x
tan(x)
The tangent of x
ctn(x)
The cotangent of x
log(x)
The
In(x)
The natural (base e) logarithm of x
abs(x)
The absolute value of x
-1E^20<>1E^20
Numerals, equation constants
(* )x = argument mathematical expression
After you got yourself familiar with the operands and conventions, you
can commence with a few simple equations and see what they do
your waveform screen. Once you'll get the feel, you'll be able to
explore your own creativity to generate much more complicated and
complex waveforms.
very interesting however, pay close attention to the convention that is
used in this equation. You cannot type: Ampl(p)=-2p+1000, like you
ArbExplorer 5-45
