When running the program, an error like "The function or variable'getLoc' cannot be recognized" is displayed.Everyone, please help to see if there is any problem, thank you very much!

CODE:

close all
clear
clc
%%set up video reader and player
videoFReader=vision.VideoFileReader('Dune.MP4',... 
    'VideoOutputDataType','double');
vidPlayer=vision.DeployableVideoPlayer;
%%create tracker object
tracker=vision.HistogramBasedTracker;

%%Initialize tracker
img=step(videoFReader);
figure
imshow(img)
h=drawrectangle;%imrect
wait(h);

[~,centLoc]=getLoc(h);%boxLoc=getLoc(h)
MotonModel='ConstantVelocity';
InitialLocation=centLoc;
InitialEstimateError=[10,10];
MotionNoise=[20 20];
MeasurementNoise=2000;

kf=configureKalmanFilter(... 
    MotionModel,... 
    InitialLocation,... 
    InitialEstimateError,...
    MotionNoise,...
    MeasurementNoise);

%%%loop algorithm
while (~isDone(videoFReader))
    
    videoFrame=step(videoFReader);
    trackedLocation=predict(kf);
    out=insertShape(videoFrame,'circle',[trackedLocation 20],...
        'Color','green','LineWidth',5);
    
    %detect ball
    [~,detectedLocation]=segmentBall(videoFrame,5000);
    if(~isempty(detectedLocation))
        %if ball is found,correct or update the Kalman filter
        trackedLocation=correct(kf,detectedLocation);
        out=insertShape(videoFrame,'circle',[trackedLocation 5],...
        'Color','blue','LineWidth',5);
    end
    
    step(vidPlayer,out);
    pause(0.1)
    
    
    
end

[Walter Roberson]

getLoc appears to be part of https://www.mathworks.com/matlabcentral/fileexchange/57936-computer-vision-for-student-competitions-object-tracking

[Wesley]

Okay, thank you very much for your suggestions.