138
Alphabetical Listing
QR
Catalog >
computations are done using floating-
point arithmetic.
•
If
Tol
is omitted or not used, the default
tolerance is calculated as:
5E
−
14
•
max(dim(
Matrix
))
•
rowNorm
(
Matrix
)
The QR factorization is computed
numerically using Householder
transformations. The symbolic solution is
computed using Gram-Schmidt. The
columns in
qMatName
are the orthonormal
basis vectors that span the space defined by
matrix
.
QuadReg
Catalog >
QuadReg
X
,
Y
[
,
Freq
][
,
Category
,
Include
]]
Computes the quadratic polynomial
regression
y=a
•
x
2
+b
•
x+c
on lists
X
and
Y
with frequency
Freq
. A summary of results
is stored in the
stat.results
variable. (See
page 172.)
All the lists must have equal dimension
except for
Include
.
X
and
Y
are lists of independent and
dependent variables.
Freq
is an optional list of frequency values.
Each element in
Freq
specifies the
frequency of occurrence for each
corresponding
X
and
Y
data point. The
default value is 1. All elements must be
integers
≥
0.
Category
is a list of category codes for the
corresponding
X
and
Y
data.
Содержание TI-Nspire CAS
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