MATLAB: Intrinsic dimensionality of Data

dimension reductionmatlab coderneural networks

Hi is there any MAT LAB code for checking the intrinsic dimensionality of the reduced dimension. Thanks

Best Answer

https://www.mathworks.com/matlabcentral/fileexchange/40112-intrinsic-dimensionality-estimation-techniques

Or intrinsic_dim from https://lvdmaaten.github.io/drtoolbox/

Related Solutions

MATLAB: Finding intrinsic dimensionality of data set

Hi,

latent (column vector) stores the eigenvalues of the covariance matrix of X.

Executing

cumsum(latent/sum(latent))

would tell you the % of data variance in each dimension.

Finally, the number of dimensions will depend on how much variance you wish to have in your data.

For example, in your case it comes out to be ~ 94% of variance upto 9th dimension.

MATLAB: Working with Ouster Lidar and pointcloud2

Hello Julien,

I haven't tried the Ouster data, but there are two options when reading messages from rosbag: you can read them in as structures or as message objects. If you use "DataFormat","struct", the read will generally be faster, but it is not currently usable with the convenience functions readXYZ and readRGB. I would suggest leaving off the "DataFormat" name-value pair to extract the messages as objects, then call the functions.

-Cam

Best Answer

Related Solutions

MATLAB: Finding intrinsic dimensionality of data set

MATLAB: Working with Ouster Lidar and pointcloud2

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