In this post I’ll discuss how to change the Jupyter notebook startup folder in Anaconda which is installed on a Windows system. I find it easier to work in a startup folder where I keep all my development workspaces. So
What is Pooled Variance and how is it calculated
Definition Pooled Variance is a method to estimate the common variance of two or more populations (the underlying assumption here is that the variance of these populations is the same) by using the sample variances from these populations. Formula Pooled
Variance and Standard Error of the Mean – Derivation
Prerequisite concepts Expectation is the probability-weighted mean of the sum of all the possible outcomes of an experiment. It is also known as the expected value, mathematical expectation, EV, average, mean value, mean, or first moment. It is denoted as
How to translate between coordinate systems that use different basis vectors
In my previous blogs I talked about Linear Transformations and how can we find the transformation matrix of a linear transformation. In this blog we will try to understand how to translate basis vectors between different coordinate systems with the
What is the significance of matrix multiplication
It is important to always think of a matrix as a representation of the transformed standard basis vectors rather than just thinking about a matrix as a rectangular array of random real numbers. With this thought, matrix multiplication can be
How to find the transformation matrix of a linear transformation
The transformation matrix is a representation of the transformed standard basis vectors. For example, in a 2-dimensional coordinate system if the transformed coordinates of the unit vector are, and that of unit vector are, These two basis vectors can be
Introduction to Linear Transformations
What is a Linear Transformation? It is a function (the word ‘transformation‘ means the same thing as the word ‘function‘) which takes vectors as inputs and produces vectors as outputs. Linear transformation is also called ‘Linear Map‘ or ‘Linear Mapping‘.
How to create a vector in Python using numpy
Mathematically, a vector is a tuple of n real numbers where n is an element of the Real (R) number space. Each number n (also called a scalar) represents a dimension. For example, the vector v = (x, y, z)
Difference between ndarray and array in numpy
numpy.array() is just a method which returns an array object of the type ndarray. Since the name of the method is array, developers who are new to Python often tend to confuse that numpy.array returns an array object of some
How to install a Python package in Eclipse
In my previous blog I talked about How to install Python PyDev plugin in Eclipse. In this blog, I’ll show how to install a python package in Eclipse using pip. pip is a tool for installing Python packages. To use