by Suf | Sep 25, 2022 | Finance, Programming, R, Tips
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...
by Suf | Sep 25, 2022 | Programming, R, Tips
This error occurs when you have a closing curly bracket in your code without a corresponding opening curly bracket. You can solve this error by finding the position in your code that requires an opening bracket. This tutorial will go through how to solve the error...
by Suf | Sep 17, 2022 | Programming, R, Tips
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...
by Suf | Sep 6, 2022 | Programming, R, Tips
This error occurs if you try to write to a file in a directory that was not found by the R interpreter. You can solve this error by creating the directory using dir.create() or removing the missing directory from the file save path. For example, x <- c(rnorm(10))...
by Suf | Sep 4, 2022 | Programming, R, Tips
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...
by Suf | Sep 3, 2022 | Programming, R, Tips
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...
