Data Frame Column Vector
A tutorial on retrieving individual column vectors in a data frame with the double square operator. read more
View ArticleData Frame Column Slice
A tutorial on retrieving a collection of column vectors in a data frame with the single square operator. Discussion on usage of numeric and name indexing. read more
View ArticleData Frame Row Slice
A tutorial on retrieving a collection of row vectors in a data frame. Discussion on the usage of numeric, name and logical indexing. read more
View ArticlePopulation Mean Between Two Independent Samples
A tutorial on statistical inference about population mean between two independent samples. read more
View ArticleMann-Whitney-Wilcoxon Test
A tutorial of performing statistical analysis with the Mann-Whitney-Wilcoxon test. read more
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Logistic Regression
We use the logistic regression equation to predict the probability of a dependent variable taking the dichotomy values 0 or 1. Suppose x1, x2, ..., xp are the independent variables, α and βk (k = 1,...
View ArticleDistance Matrix by GPU
A comparison of computing the distance matrix in CPU with dist function in core R, and in GPU with rpuDist in rpud. read more
View ArticleEstimated Logistic Regression Equation
A tutorial on performing logistic regression estimate. read more
View ArticleSignificance Test for Logistic Regression
A tutorial on performing the significance test for a logistic regression. read more
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Hierarchical Cluster Analysis
With the distance matrix found in previous tutorial, we can use various techniques of cluster analysis for relationship discovery. For example, in the data set mtcars, we can run the distance matrix...
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