Monday, 2 July 2018

Linear Regression - Part(2) [Matrix Calculus]

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Previously, I had posted part(1) of the linear regression, where we dealt with machine learning perspective.  And, I had promised to presen...
Tuesday, 29 May 2018

Linear Regression - Part(1) [Machine Learning Perspective]

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Motivation: Suppose we want to predict the rent price of a room.  Prediction requires some features or variables on the basis of which we...
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Sunday, 11 March 2018

Visualization Challenge on Simple Linear Algebra Problem

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A $n \times n$ matrix multiplies with $n$ dimensional column vector to produce another $n$ dimensional column vector.  Here, we do the visu...
Thursday, 1 March 2018

How Does ReLU Function Give Non-linearity?

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Rectified Linear Unit(ReLU) function is one of the activation functions used massively in neural networks.  ReLU function and its variants ...
Tuesday, 23 January 2018

Sigmoid Function and Softmax Function, Are They Related?

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Sigmoid function is an activation function that gives value in the range of 0 to 1.  Values very much less than 0 gives activation value cl...
Monday, 4 July 2016

Secret to Solving the Square Puzzle

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During my childhood days, I was very much interested in math tricks though I didn't learn much of them.  One of the puzzle that I got t...
Monday, 27 June 2016

Four Pauses

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The shivering cold has long since gone.  I am still to take off my jackets.  The heat has already started to generate in my body.  I feel ...