derive.R
In crunch: Crunch.io Data Tools

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library(crunch)
load("vignettes.RData")
options(width=120)

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#  ds$age <- 2015 - ds$birthyr

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#  summary(ds$age)

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age.summary.before

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#  summary(ds$birthyr)

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by.summary.before

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#  class(2015 - ds$birthyr)

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class(cr.expr)

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#  ds$birthyr[ds$birthyr < 1945] <- 1945

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#  summary(ds$birthyr)

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by.summary.after

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#  summary(ds$age)

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age.summary.after

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#  class(ds$birthyr < 1945)

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class(cr.log.expr)