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Slope, Intercept and Distance

斜率、截距以及点到直线的距离


R profiling


R <<- operator


R apply family


Digest of Agile Software Development: Principles, Patterns, and Practices


R Scoping Rules


R Data Types - Part 3: Missing Values, Data Frames & Names


R Data Types - Part 2: Factors


R Data Types - Part 1: Basis, Vectors, Matrices & Lists


Digest of Effective Java