Eq u a ls') – HP 38g Graphing Calculator User Manual
Page 61
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Statistics-Two
Symbolic
Functions
These are functions for use with two-variable statistics. See
chapter 5, Statistics.
The symbolic functions are used for symbolic manipulations
of expressions. The variables can be formal or numeric, but
the result is usually in symbolic form (not a number). You will
find the symbols for the symbolic functions = and
1
(where)
in
the CHARS menu (|P [CHARS]) as well as the MATH menu.
=
(eq u a ls')
Sets an equality for an equation. This is
not
a logical operator.
(See the Test category.)
expression 1 =expression2
ISOLATE
Isolates the first occurrence of
variable
in
expression
and
returns an equation,
variable=value.
The result is a general
solution that represents multiple solutions by including the
(formal) variables s7 to represent any sign and
nl to
represent
any integer.
ISOLATE
{expression, variable)
UNEAR?
Tests whether
expression
is linear for the specified
variable.
Returns
0
(false) or
1
(true).
LINEAR?
[expression, variable)
QUAD
Solves quadratic
expression
for
variable
and returns an
equation,
variable=newexpression.
The result is a general
solution that represents both positive and negative solutions by
including the (formal) variable
si
to represent any sign, -r or - .
QUAD
{
expression, variable
)
QUOTE
Encloses an expression that should not be evaluated
numerically.
QUOTE
(
expression)
1
(where)
Evaluates
expression
where each given variable is set to the
given
value.
Allows numeric evaluation of a symbolic
expression.
expression \
(
variable 1 =value 1,variable2=value2,
...)
Mathematical Calculations 2-25