inpolygons

Finds points inside multiple polygons, holes possible.

Description

This function is similar to MATLAB's inpolygon function, but allows the polygon vertices to describe multiple polygons, and allows these polygons to have holes in them. In the case of multiple polygons, it also returns the index of the polygon in which a point was found.

• Required Products: Mapping Toolbox
• MATLAB release: MATLAB 7.0.1 (R14SP1)

[peng wenmin]

 

[Eleonora Vidolova]

 

[Gennady Khokhorin]

Thanks, nice work!

[Matt K.]

Works perfectly and very quickly!
The Mapping Toolbox saves me again!

[Ben G]

Got an error just running the example.

??? Error using ==> vertcat
All rows in the bracketed expression must have the same
number of columns.

Error in ==> polysplit at 35
if ~isnan( lat(length(lat)) ); lat = [lat; NaN]; end

Error in ==> inpolygons at 59
[xsplit, ysplit] = polysplit(xv, yv);

[Kelly Kearney]

Ben,

What version of Matlab are you running? The example runs fine on my computer, R2007b (Mapping Toolbox 2.4). But the line numbers you list don't agree with either of my copies of the code (the inpolygons line you note as 59 is line 69 in the code offered here, and the line you note in polysplit doesn't appear at all in my version of polysplit.m).