local2grid

Convert local coordinates to grid indices

Since R2019b

Syntax

ij = local2grid(map,xy)

Description

ij = local2grid(map,xy) converts an array of local coordinates, xy, to an array of grid indices, ij in [row col] format.

Examples

Convert Local Coordinates in Occupancy Map to Grid Indices

Create an empty occupancy map with a width and height of 10 meters.

map = occupancyMap(10,10);

Get grid indices from local coordinates.

[xLocal,yLocal] = meshgrid(0:0.5:2);
ij = local2grid(map,[xLocal(:) yLocal(:)]);

Input Arguments

map — Map representation

occupancyMap object | mapLayer object | multiLayerMap object | signedDistanceMap object

Map representation, specified as a occupancyMap, mapLayer, multiLayerMap, or signedDistanceMap object.

xy — Local coordinates

n-by-2 matrix

Local coordinates, specified as an n-by-2 matrix of [x y] pairs, where n is the number of local coordinates.

Output Arguments

ij — Grid positions

n-by-2 matrix

Grid positions, returned as an n-by-2 matrix of [i j] pairs in [row col] format, where n is the number of grid positions. The grid cell locations start at (1,1) and are counted from the top left corner of the grid.

Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using MATLAB® Coder™.

Version History

Introduced in R2019b

R2023a: Signed Distance Map Support

The local2grid function now supports the signedDistanceMap object as a new map representation for the map argument.