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reshape2 is retired, superceded by tidyr #2

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enzedonline opened this issue Dec 15, 2021 · 1 comment

enzedonline commented Dec 15, 2021

05.03 - Packages.R

reshape2 is retired, superceded by tidyr
ref: https://www.rdocumentation.org/packages/reshape2/versions/1.4.4

tidyr reference:
https://r4ds.had.co.nz/tidy-data.html

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enzedonline commented Dec 16, 2021

In Data Frames Part B, you can achieve the melt equivalent with gather:

> data("iris")
> force("iris")
> library(tidyr)
> iris$ID <- 1:nrow(iris)
> tidyIris <- iris %>% gather(measureType, measure, -ID, -Species)
> View(tidyIris)
> tidyIris[tidyIris$ID==1,]
    Species ID  measureType measure
1    setosa  1 Sepal.Length     5.1
151  setosa  1  Sepal.Width     3.5
301  setosa  1 Petal.Length     1.4
451  setosa  1  Petal.Width     0.2

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