Maple für Professional
Maple für Akademiker
Maple für Studenten
Maple Personal Edition
Maple Player
Maple Player für iPad
MapleSim für Professional
MapleSim für Akademiker
Maple T.A. - Testen & beurteilen
Maple T.A. MAA Placement Test Suite
Möbius - Online-Courseware
Machine Design / Industrial Automation
Luft- und Raumfahrt
Fahrzeugtechnik
Robotics
Energiebranche
System Simulation and Analysis
Model development for HIL
Anlagenmodelle für den Regelungsentwurf
Robotics/Motion Control/Mechatronics
Other Application Areas
Mathematikausbildung
Technik
Allgemein- und berufsbildende Schulen
Testen und beurteilen
Studierende
Finanzmodelle
Betriebsforschung
Hochleistungsrechnen
Physik
Live-Webinare
Aufgezeichnete Webinare
Geplante Veranstaltungen
MaplePrimes
Maplesoft-Blog
Maplesoft-Mitgliedschaft
Maple Ambassador Program
MapleCloud
Technische Whitepapers
E-Mail Newsletters
Maple-Bücher
Math Matters
Anwendungs-Center
MapleSim Modell-Galerie
Anwenderberichte
Exploring Engineering Fundamentals
Lehrkonzepte mit Maple
Maplesoft Welcome-Center
Resource-Center für Lehrer
Help-Center für Studierende
match - pattern matching
Calling Sequence
match(expr = pattern, v, 's')
match(expr = pattern, {v1, v2, ..., vN}, 's')
Parameters
expr
-
expression of type algebraic to be matched
pattern
pattern (also of type algebraic) to match
v
name of the main variable
's'
name of the return argument
{v1, v2, ..., vN}
names of the main variables
Description
The match(expr = pattern, v, 's') calling sequence returns true if it can match expr to pattern for some values of the variables (excluding the main variable, v). Otherwise, it returns false.
The match(expr = pattern, {v1, v2, ..., vN}, 's') calling sequence returns true if it can match expr to pattern for some values of the variables (excluding the main variables, {v1, v2, ..., vN}). Otherwise, it returns false.
Note: In the multiple main variable case, the pattern specified must be a polynomial in all, or all but one of, the main variables. That is, type(pattern, polynom(anything, vI)) must be true for (N - 1) values of I in the range 1, 2, ..., N. Otherwise, the match command returns false.
If the match is successful, s is assigned a substitution set such that .
The main variables must be matched exactly in the pattern. In other words, the main variables cannot be substituted for any value.
The match command attempts to compute expressions to satisfy the pattern, as opposed to the typematch command that matches the form of the objects.
Examples
In the multiple main variable case, if the pattern is not a polynomial in (all but one of) the main variables, the match command always returns false.
The pattern is polynomial in one of the two main variables, and suitable values can be found for all non-main variables in the following example.
See Also
patmatch, solve[identity], subs, type/polynom, typematch
Download Help Document