where can I find helperCalc​ulateClass​Weights helper function?

Hi! I am tryin to repeat the pointnet++ code https://www.mathworks.com/help/deeplearning/ug/aerial-lidar-segemation-using-pointnet.html . However, I stuck at the code.

[weights,maxLabel,maxWeight] = helperCalculateClassWeights(fs,numClasses);

it return me the error.

Undefined function 'helperCalculateClassWeights' for input arguments of type

'matlab.io.datastore.FileSet'

The website said that "Use the helperCalculateClassWeights helper function, attached to this example as a supporting file, to calculate the point distribution across all the classes in the training dataset.". but the suporting function did not have the function helperCalculateClassWeights.

I wonder did matlab forget to add this function to the content or I should find it somewhere else.

Answer 1

[Walter Roberson]

I do not have the Lidar Toolbox, but I do have the Deep Learning Toolbox.

After I execute the command

openExample('deeplearning_shared/AerialLidarSemanticSegmentationUsingPointNetExample')

then the file shows up at

~/Documents/MATLAB/Examples/R2023b/deeplearning_shared/AerialLidarSemanticSegmentationUsingPointNetExample/helperCalculateClassWeights.m

on my Mac.

[Steven Lord]

That's correct. If you open the example in MATLAB, MATLAB will automatically cd into the example directory where the helper function is located.