  The central aim of this paper is to implement Deep Autoencoder and
Neighborhood Components Analysis (NCA) dimensionality reduction methods in
Matlab and to observe the application of these algorithms on nine unlike
datasets from UCI machine learning repository. These datasets are CNAE9,
Movement Libras, Pima Indians diabetes, Parkinsons, Knowledge, Segmentation,
Seeds, Mammographic Masses, and Ionosphere. First of all, the dimension of
these datasets has been reduced to fifty percent of their original dimension by
selecting and extracting the most relevant and appropriate features or
attributes using Deep Autoencoder and NCA dimensionality reduction techniques.
Afterward, each dataset is classified applying K-Nearest Neighbors (KNN),
Extended Nearest Neighbors (ENN) and Support Vector Machine (SVM)
classification algorithms. All classification algorithms are developed in the
Matlab environment. In each classification, the training test data ratio is
always set to ninety percent: ten percent. Upon classification, variation
between accuracies is observed and analyzed to find the degree of compatibility
of each dimensionality reduction technique with each classifier and to evaluate
each classifier performance on each dataset.
