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Base R Plot Series (Part = 1): Line Graph
We begin our plot series with a plot of Apple (AAPL) weekly stock prices for 2015 using simple Base R, no ggplot, no ggplot2.
Base R Plot Series (Part = 2): Boxplot
Generate a nice boxplot using Base R and a standard Iris dataset.
Excel Pivot Tables: Text Instead of Counts - VBA Method
Sometimes there is a need for using Pivot table to display data as a categorical table. This is a bit complicated, but working way to do it.
Kernel Density Estimation: Predict KDE & Generate Data
For a given data set X, predict its density function. Using the found density function generate new random data set Y and check the hypothesis that X and Y distributions are identical.
Sort Given List of Fruits in Ascending Order Using Only Excel Tokens
This Excel task is really addicting and you definitely cannot go to sleep without finishing it - because you are an Excel Pro, right? :)
Tutorial: Finding Rectangles with NO OpenCV
For any given image write a program to find all rectangular objects which are darker than the background. Draw the located rectangles on the output image.