isShapeMultipart

True if polygon or line has multiple parts

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Syntax

tf = isShapeMultipart(xdata, ydata)

Description

tf = isShapeMultipart(xdata, ydata) returns 1 (true) if the polygon or line shape specified by xdata and ydata consists of multiple NaN-separated parts (i.e. has inner or multiple polygon rings or multiple line segments). The coordinate arrays xdata and ydata must match in size and have identical NaN locations.

Examples

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Open Live Script

Create a simple data set and check if it's multipart. If a data set contains NaN separators, isShapeMultipart returns 1 , otherwise 0.

sample_xdata = [0 0 1];
sample_ydata = [0 1 0];
isShapeMultipart(sample_xdata,sample_ydata)
ans = logical
   0

Create simple multipart data sets.

multi_xdata = [0 0 1 NaN 2 2 3 3];
multi_ydata = [0 1 0 NaN 2 3 3 2];
isShapeMultipart(multi_xdata,multi_ydata)
ans = logical
   1

Check a real data set.

load coastlines
isShapeMultipart(coastlat,coastlon)
ans = logical
   1

Check the data in a shapefile.

S = shaperead('concord_hydro_area');
isShapeMultipart(S(1).X, S(1).Y)
ans = logical
   0

Check another dataset in the shapefile.

isShapeMultipart(S(14).X, S(14).Y)
ans = logical
   1

See Also

Topics

Introduced in R2006a

Mapping Toolbox Documentation

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