Projection Pursuit Classification Tree (PPtree) google
In this paper, we propose a new classification tree, the projection pursuit classification tree (PPtree). It combines tree structured methods with projection pursuit dimension reduction. This tree is originated from the projection pursuit method for classification. In each node, one of the projection pursuit indices using class information – LDA, L r or PDA indices – is maximized to find the projection with the most separated group view. On this optimized data projection, the tree splitting criteria are applied to separate the groups. These steps are iterated until the last two classes are separated. The main advantages of this tree is that it effectively uses correlation between variables to find separations, and it has visual representation of the differences between groups in a 1-dimensional space that can be used to interpret results. Also in each node of the tree, the projection coefficients represent the variable importance for the group separation. This information is very helpful to select variables in classification problems. …

Dygraphs google
dygraphs is a fast, flexible open source JavaScript charting library. It allows users to explore and interpret dense data sets. …

Probabilistic Eigenvalue Shaping (PES) google
We consider a nonlinear Fourier transform (NFT)-based transmission scheme, where data is embedded into the imaginary part of the nonlinear discrete spectrum. Inspired by probabilistic amplitude shaping, we propose a probabilistic eigenvalue shaping (PES) scheme as a means to increase the data rate of the system. We exploit the fact that for an NFTbased transmission scheme the pulses in the time domain are of unequal duration by transmitting them with a dynamic symbol interval and find a capacity-achieving distribution. The PES scheme shapes the information symbols according to the capacity-achieving distribution and transmits them together with the parity symbols at the output of a low-density parity-check encoder, suitably modulated, via time-sharing. We furthermore derive an achievable rate for the proposed PES scheme. We verify our results with simulations of the discrete-time model as well as with split-step Fourier simulations. …

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