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목록2025/03 (2)
A Joyful AI Research Journey🌳😊
ChatGPT, OpenAIA summary sheet of common tidyverse functions in R, grouped by their function types such as transforming, filtering, summarising, filling, etc. This will help you quickly recognise which function does what in dplyr and tidyr.🧾 Tidyverse Function Types Summary🔄 TransformingFunctions that change the structure, order, or content of a dataset without summarising it.mutate() – Add or..
Claude 3.7 Sonnet Think In mathematics, a pre-image refers to the input value(s) that map to a specific output value when a function is applied.More formally:If f: X → Y is a function and y ∈ Y is an element in the codomainThe pre-image of y is the set of all elements x ∈ X such that f(x) = yFor a one-to-one (injective) function, each element in the codomain must have at most one pre-image in th..
