perimeter

Perimeter of polyshape

Syntax

P = perimeter(polyin)

P = perimeter(polyin,I)

Description

P = perimeter(polyin) returns the perimeter of a polyshape object, which is the sum of the lengths of its boundaries.

P = perimeter(polyin,I) returns the perimeter of the Ith boundary of polyin.

This syntax is only supported when polyin is a scalar polyshape object.

Examples

Perimeter of Polygon

Create a polygon with one hole, and compute its perimeter.

V = [0 0; 0 2; 2 2; 2 0; NaN NaN; 0.5 0.5; 0.5 1.5; 1.5 1.5; 1.5 0.5];
polyin = polyshape(V);
plot(polyin)
axis equal

P = perimeter(polyin)

P = 
12

Input Arguments

polyin — Input polyshape

scalar | vector | matrix | multidimensional array

Input polyshape, specified as a scalar, vector, matrix, or multidimensional array.

Data Types: polyshape

I — Boundary index

scalar integer | vector of integers

Boundary index, specified as a scalar integer or vector of integers. Each element of I corresponds to a single boundary of the input polyshape.

Data Types: double | single | int8 | int16 | int32 | int64 | uint8 | uint16 | uint32 | uint64

Extended Capabilities

C/C++ Code Generation

Generate C and C++ code using MATLAB® Coder™.

Usage notes and limitations:

• Dynamic memory allocation must be enabled for code generation.

• Name-value pair must be compile time constant.

Version History

Introduced in R2017b