inpolygons

Finds points inside multiple polygons, holes possible.
3.6K descargas
Actualizado 23 Sep 2021

inpolygons.m Documentation

Author: Kelly Kearney View inpolygons on File Exchange

This function checks whether a point or points is inside one or more polygons. The polygons can have holes in them. When dealing with a large number of points and/or polygons, this can be faster that inpolygon.m.

Syntax

in = inpolygons(x,y,xv,yv)
[in, index] = inpolygons(x,y,xv,yv)

See function help for description of input and output variables.

Example

We'll start with two polygons: a rectangle with square- and triangle-shaped holes, and a solid diamond:

xv = [1 1 7 7 1 NaN 2 3 3 2 2 NaN 5 6 5 5 NaN 7 8 9 8 7];
yv = [1 4 4 1 1 NaN 2 2 3 3 2 NaN 2 2 3 2 NaN 8 9 8 7 8];

[f, v] = poly2fv(xv, yv);

patch('Faces', f, 'Vertices', v, ...
      'FaceColor', [.9 .9 .9], ...
      'EdgeColor', 'none');

inpolygons1

Now, we scatter a couple hundred random points, and test which polygons they fall into.

x = 10 * rand(200,1); 
y = 10 * rand(200,1);

[in, index] = inpolygons(x, y, xv, yv);
index = cell2mat(index);  % No overlapping polygons allows this.

plot(x(in), y(in), 'r.', x(~in), y(~in), 'b.');
plot(x(index==1), y(index==1), 'go', x(index==2), y(index==2), 'mo');

inpolygons2

Citar como

Kelly Kearney (2024). inpolygons (https://github.com/kakearney/inpolygons-pkg), GitHub. Recuperado .

Compatibilidad con la versión de MATLAB
Se creó con R14SP1
Compatible con cualquier versión
Compatibilidad con las plataformas
Windows macOS Linux
Categorías
Más información sobre Data Analysis en Help Center y MATLAB Answers.

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inpolygons

No se pueden descargar versiones que utilicen la rama predeterminada de GitHub

Versión Publicado Notas de la versión
1.1.0.1

linked GitHub readme

1.1.0.0

Linked to GitHub repository

1.0.0.0

Para consultar o notificar algún problema sobre este complemento de GitHub, visite el repositorio de GitHub.
Para consultar o notificar algún problema sobre este complemento de GitHub, visite el repositorio de GitHub.