Chapter 12: Statistics
204
SinReg
[
iterations
,
Xlistname
,
Ylistname
,
period
,
regequ
]
iterations
is the maximum number of times the algorithm will iterate to find a solution. The value for
iterations
can be an integer
‚
1 and
16; if not specified, the default is 3. The algorithm may find a
solution before
iterations
is reached. Typically, larger values for
iterations
result in longer execution
times and better accuracy for
SinReg
, and vice versa.
A
period
guess is optional. If you do not specify
period
, the difference between time values in
Xlistname
must be equal and the time values must be ordered in ascending sequential order. If you
specify
period
, the algorithm may find a solution more quickly, or it may find a solution when it
would not have found one if you had omitted a value for
period
. If you specify
period
, the differences
between time values in
Xlistname
can be unequal.
Note:
The output of
SinReg
is always in radians, regardless of the Radian/Degree mode setting.
SinReg Example: Daylight Hours in Alaska for One Year
Compute the regression model for the number of hours of daylight in Alaska during one year.
With noisy data, you will achieve better convergence results when you specify an accurate
estimate for
period
. You can obtain a
period
guess in either of two ways.
MathPrint™
Classic
1 period