HP 15c Collector's Edition User Manual

Function Summary and Index 277
(For matrix use, refer to
Matrix Functions keys,
page 276.)
p Permutation.
Computes the number of
possible different
arrangements of y
different items taken x
at a time, and causes the
stack to drop (page 47).
(For matrix use, refer to
Matrix Functions keys,
page 276.)
Stack Manipulation
® Exchanges
contents of X- and Y-
stack registers
(page 34).
X X-register
exchange. Exchanges
contents of X-register
with those of any other
named storage register.
Used with V, %, digit,
or . digit address
(page 42).
} Real exchange
imaginary. Exchanges
the contents of the real
and imaginary X-
registers and activates
Complex mode
(page 124).
) Rolls down contents
of stack (page 34).
( Rolls up contents of
stack (page 34).
` Clears contents of
display (X-register) to
zero (page 21).
− In Run mode:
removes the last digit
keyed in, or clears the
display (if digit entry has
been terminated)
(page 21).
Statistics
z Accumulates
numbers from X- and Y-
registers into storage
registers R
2
through R
7
(page 49).
l z Copies Σy
from R
3
and Σx from R
5
into the X-register and
the Y-register,
respectively (page 50).
w Removes numbers in
X- and Y-registers from
storage registers R
2
through R
7
for correcting
z accumulations
(page 52).
’ Computes mean of
x- and y-values
accumulated by z
(page 53).
S Computes sample
standard deviations of x-
and y-values
accumulated by z
(page 53).
j Linear estimate and
correlation coefficient.
Computes estimated
value of y (ŷ) for a given
value of x by least
squares method and
places result in X-
register. Computes the
correlation coefficient, r,
of the accumulated data
and places result in Y-
register (page 55).
L Linear Regression.
Computes the y-
intercept and slope for
the linear function best
approximating the
accumulated data. The
value of the y-intercept
is placed in the X-
register; the value of the
slope is placed in the Y-
register (page 54).
# Random number.
Yields a pseudorandom
number as generated
from a seed stored using
O # (page 48).
CLEAR ∑ Clears
contents of the statistics
registers (R
2
to R
7
)
(page 49).

HP 15c Collector's Edition Specifications

General

Model	HP 15c Collector's Edition
Category	Calculator
Type	Scientific
Power Source	Battery
Manufacturer	HP
Display	LCD
Functions	complex numbers, matrix operations

Summary

Introduction

This Handbook

Outlines the structure of the manual, detailing its parts and how to use it for learning.

The HP Community

Discusses user groups and websites for HP calculator enthusiasts and information sharing.

Part I: HP 15c Fundamentals

Section 1: Getting Started

Covers basic operations like powering on, keyboard layout, and primary/alternate functions.

Section 2: Numeric Functions

Explains essential numeric operations including logs, trig, powers, and conversions.

Section 3: The Automatic Memory Stack, LAST X, and Data Storage

Details the RPN stack, LAST X register, and data storage operations.

Part II: HP 15c Programming

Section 6: Programming Basics

Introduces core programming concepts: creating, loading, running programs, and memory.

Section 8: Program Branching and Controls

Covers controlling program flow using branching, loops, and conditional tests.

Part III: HP 15c Advanced Functions

Section 11: Calculating With Complex Numbers

Covers entering, manipulating, and performing calculations with complex numbers.

Section 12: Calculating With Matrices

Explains matrix operations, including dimensioning, element access, and calculations.

Section 13: Finding the Roots of an Equation

Details using the SOLVE function for numerical root finding and equation solving.

Section 14: Numerical Integration

Explains how to perform numerical integration using the ∫f(x)dx key and subroutines.

Appendix A: Error Conditions

Error 8: No Root

Explains the error when the SOLVE function cannot find a root.

Error 0: Improper Mathematics Operation

Lists and explains errors related to mathematical operations and illegal arguments.

Appendix D: A Detailed Look at SOLVE

How SOLVE Works

Explains the numerical technique and logic behind the SOLVE algorithm.

Finding Several Roots

Discusses methods for finding multiple roots of an equation using the SOLVE function.