Statistics 2Var app
91
To define your
own fit
1. Display the Symbolic view.
2. Highlight the Fit expression (
Fit1
, etc.) for the
desired data set.
3. Type in an expression and press
E
. The
independent variable must be
X
, and the expression
must not contain any unknown variables.
Example:
.
Computed statistics
When you press
, there are three sets of statistics
available. By default, the statistics involving both the
independent and dependent columns are shown. Press
to see the statistics involving just the independent
column or
to display the statistics derived from the
Logistic
Fits to a logistic curve,
where
L
is the saturation value
for growth. You can store a
positive real value in
L
, or—if
L
=0—let
L
be computed
automatically.
Quadratic
Fits to a quadratic curve,
y = ax
2
+bx+c
.
Needs at least
three points.
Cubic
Fits to a cubic polynomial,
Quartic
Fits to a quartic polynomial,
Trigonometric
Fits to a trigonometric curve,
. Needs
at least three points.
User Defined
Define your own expression (in
the Symbolic view.)
Fit model
Meaning (Continued)
y
L
1
ae
bx
–
(
)
+
--------------------------
=
y
ax
3
b
2
x
cx
d
+
+
+
=
y
ax
4
bx
3
cx
2
dx
e
+
+
+
+
=
y
a
bx
c
+
(
)
sin
⋅
d
+
=
1.5
x
cos
×
0.3
x
sin
×
+
Summary of Contents for 39gII
Page 1: ...HP 39gII graphing calculator user s guide Edition1 Part Number NW249 90001 ...
Page 2: ...Printing History Edition 1 November 201 1 ...
Page 32: ...22 Getting started ...
Page 58: ...48 Apps and their views ...
Page 70: ...60 Function app ...
Page 80: ...70 Solve app ...
Page 136: ...126 Polar app ...
Page 140: ...130 Sequence app ...
Page 148: ...138 Finance app ...
Page 152: ...142 Linear Solver app ...
Page 218: ...208 Matrices ...
Page 226: ...216 Notes and Info ...
Page 238: ...228 Variables and memory management ...
Page 318: ...308 Programming ...
Page 340: ...330 Reference information ...
Page 346: ...vi Product Regulatory Information ...