High dim input
High dimensional input data
If data dimension is much larger than the requested number of components k, linear PCA pre-processing of the data is recommended for reducing the dimension of the data before applying nonlinear PCA. This can automatically be done by using the option 'pre_pca'.
The dimension of the input data will be reduced to 12 by setting this number as required input (and output) units of the nonlinear network structure.