4Polar; Polyeval(); Powerreg - Texas Instruments TI-NSPIRE Reference Manual

4
Polar
Vector 4
Polar
Displays vector in polar form [r
dimension 2 and can be a row or a column.
4
is a display-format instruction, not a conversion
Note: Polar
function. You can use it only at the end of an entry line, and it does
not update ans.
4
See also , page 65.
Note: Rect
4
complexValue
Polar
Displays complexVector in polar form.
• Degree angle mode returns (r
• Radian angle mode returns re
complexValue can have any complex form. However, an re
causes an error in Degree angle mode.
You must use the parentheses for an (r
Note:

polyEval()

⇒
List1 Expr1
polyEval( , )
⇒
List1 List2
polyEval( , )
Interprets the first argument as the coefficient of a descending-degree
polynomial, and returns the polynomial evaluated for the value of the
second argument.

PowerReg

X Y Freq
PowerReg , [, ] [,
Calculates the power regression. A summary of results is stored in the
stat.results variable. (See page 76.)
All the arguments must have equal dimensions except for Include.
X represents xlist.
Y represents ylist.
Freq represents frequency list.
Category represents category codes.
Include represents category include list.
Output variable
stat.RegEqn
stat.a, stat.b
2
stat.r
stat.r
stat.Resid
stat.ResidTrans
TI-Nspire™ Reference Guide
q
]. The vector must be of
q
).
iq
.
q
) polar entry.
expression
expression
Category Include
, ]]
Description
·
b
Regression equation: a (x) .
·
Regression coefficients: y = a
Coefficient of determination.
Correlation coefficient for linear model.
Residuals of the curves fit = y - a
Residuals associated with linear fit of transformed data.
In Radian angle mode:
iq
entry
In Gradian angle mode:
In Degree angle mode:
b
(x) .
·
b
(x) .
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