Select Page


Black-Scholes Option Pricing in R

The Black-Scholes or Black-Scholes-Merton model is a financial mathematical equation for pricing options contracts and other derivatives. Fischer Black and Myron Scholes published the formula in their 1973 paper "The Pricing of Options and Corporate Liabilities"....

read more

How to Remove Legend in ggplot2

You can remove a legend from a plot using the syntax legend.position="none" for the plot theme. For example, library(ggplot2) ggplot(data = mtcars, aes(x = mpg, y = disp, color = vs)) + geom_point() + theme(legend.position="none") This tutorial will go through how to...

read more

How to Center Plot Title in ggplot2 with R

The easiest way to center a title using ggplot2 is to modify the plot.title component of the theme using element_text(hjust=0.5). For example, library(ggplot2) ggplot(data=mtcars, aes(x=mpg, y=wt)) + geom_point() + ggtitle("Automobile Weight vs Miles per Gallon") +...

read more

How to Transpose a Data Frame in R

The easiest way to transpose a data frame is to use the transpose() function from the data.table library. For example, library(data.table) # get data data("mtcars") # transpose t_mtcars <- transpose(mtcars) # get row and colnames in order colnames(t_mtcars) <-...

read more

How to Sum the Elements of a Vector in C++

The simplest way to sum the elements of a vector is to use the accumulate function. This tutorial will describe the different ways to sum the elements of a vector with code examples. Table of contentsSum Elements of a Vector Using accumulateSum Elements of a Vector...

read more