Averaging; Functions - Fourier TriLink User Manual

=
Polynomial y a
Draws a line of polynomial least square fit (you must select an order
between 1 and 6.)
Power y =
x
Draws a line of power least square fit.
Exponential y =
ae
Draws a line of exponential least square fit.
MultiLab displays the curve fit equation and the correlation coefficient (R
information bar below the graph

2.Averaging

The average function replaces every point with the average of n neighboring points
from both sides of the point.
=
n 5
Low averaging:

3.Functions

In the formulas below, G
constants that you can enter. The constant's default value is 1.
y =
C
Absolute
Draws a line of the absolute values of a data set.
=
Add y C
Draws a line of the addition of two data sets
y =
Arccosine C
Draws a line of the arccosine values of a data set (in radians).
Arccosine is the angle whose cosine is
must be between –1 and 1.
y =
Arcsine
C
Draws a line of the arcsine values of a data set in radians. Arcsine is
the angle whose sine is
–1 and 1.
112 Chapter 4 Working with a desktop computer
−
n n 1
+ + +
x a x a
L
0 1 n
a
n
bx
, Medium averaging:
and G represent selected data sets, and C
1 2
C G
1 2 1
+
G C G
1 1 2 2
arccos( C G )
1 2 1
arcsin( C G )
1 2 1
C
=
n 11
, High averaging:
C G
. The argument
2 1
G C
. The argument
2 1
2
) on the
=
n 41
.
and C are
1 2
C G
2 1
G
must be between
2 1