by Suf | May 21, 2022 | Finance, Programming, R, Tips
R provides several powerful tools for financial market analysis. This tutorial will go through how to download and plot the daily stock prices from Yahoo! Finance using quantmod. Yahoo finance provides free access to historic stock prices at the time of writing this...
by Suf | May 20, 2022 | Programming, R, Tips
To perform element-by-element multiplication between two matrices X and Y, you must use the * operator as follows: X * Y If you want to perform matrix multiplication between two matrices X and Y, you must use the %*% operator as follows: X * Y This tutorial will go...
by Suf | May 16, 2022 | Programming, R, Tips
The Jaccard similarity compares two sets of data to determine how similar they are. The value of the Jaccard similarity can be between 0 and 1, where the close the number is to 1 the more similar the two sets of data are. This tutorial will go through how to calculate...
by Suf | May 15, 2022 | Programming, R, Tips
This tutorial will go through how to calculate the cosine similarity in R for vectors and matrices with code examples. Table of contentsWhat is Cosine Similarity?Visual Description of Cosine SimilarityCosine Similarity Between Two Vectors in RCosine Similarity of a...
by Suf | May 13, 2022 | Programming, R, Tips
This tutorial will go through counting the number of missing values or NAs in a data frame in R. Table of contentsExampleGet Airquality DataSolution #1: Use summarySolution #2: Use sum and is.naSolution #3: Use sum and is.na in FunctionSummary Example Let’s look...
by Suf | May 10, 2022 | Programming, R, Tips
This error occurs when you try to create a scatter plot using data frames instead of a pair of vectors. To solve this error, you can extract vectors from columns using a comma when subsetting the data frame or using the $ operator followed by the column names. This...
