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plot

Display laser or lidar scan readings

Since R2020b

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Syntax

plot(scanObj)
plot(___,Name,Value)
linehandle = plot(___)

Description

plot(scanObj) plots the lidar scan readings specified in scanObj.

plot(___,Name,Value) provides additional options specified by one or more Name,Value pair arguments.

linehandle = plot(___) returns a column vector of line series handles, using any of the arguments from previous syntaxes. Use linehandle to modify properties of the line series after it is created.

Examples

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This example uses:

Open Live Script

Specify lidar data as vectors of ranges and angles. These values include readings outside of the sensors range.

x = linspace(-2,2);
ranges = abs((1.5).*x.^2 + 5);
ranges(45:55) = 3.5;
angles = linspace(-pi/2,pi/2,numel(ranges));

Create a lidar scan by specifying the ranges and angles. Plot all points of the lidar scan.

scan = lidarScan(ranges,angles);
plot(scan)

Remove invalid points based on a specified minimum and maximum range. 

minRange = 0.1;
maxRange = 7;
scan2 = removeInvalidData(scan,'RangeLimits',[minRange maxRange]);
hold on
plot(scan2)
legend('All Points','Valid Points')

Figure contains an axes object. The axes object with title LiDAR Scan, xlabel X, ylabel Y contains 2 objects of type line. One or more of the lines displays its values using only markers These objects represent All Points, Valid Points.

Input Arguments

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Lidar scan readings, specified as a lidarScan object.

Name-Value Arguments

Specify optional pairs of arguments as Name1=Value1,...,NameN=ValueN, where Name is the argument name and Value is the corresponding value. Name-value arguments must appear after other arguments, but the order of the pairs does not matter.

Before R2021a, use commas to separate each name and value, and enclose Name in quotes.

Example: "MaximumRange",5

Parent of axes, specified as the comma-separated pair consisting of "Parent" and an axes object in which the laser scan is drawn. By default, the laser scan is plotted in the currently active axes.

Range of laser scan, specified as the comma-separated pair consisting of "MaximumRange" and a scalar. When you specify this name-value pair argument, the minimum and maximum x-axis and the maximum y-axis limits are set based on specified value. The minimum y-axis limit is automatically determined by the opening angle of the laser scanner.

This name-value pair only works when you input scanMsg as the laser scan.

Outputs

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One or more chart line objects, returned as a scalar or a vector. These are unique identifiers, which you can use to query and modify properties of a specific chart line.

Version History

Introduced in R2020b

See Also