General
PromptBeginner5 minmarkdownQuality: 24
breaks = c(0
25
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General
PromptBeginner5 minmarkdownQuality: 24
labels = c(18-25
26-45
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General
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df$gender <- ifelse(df$gender == 1
Male
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General
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df$date <- as.Date(df$date
format = %Y-%m-%d)
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General
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cat(sprintf(\n%s (%d unique):\n
col
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General
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print(table(df[[col]]
useNA = ifany))
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General
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cat(sprintf(Duplicate rows: %d\n
n_dup))
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General
PromptBeginner5 minmarkdownQuality: 24
cat_cols <- names(df)[sapply(df
function(x) is.character(x) | is.factor(x))]
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General
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print(nareport[nareport$n_miss > 0
])
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General
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head(df
10)
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General
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pct_miss = round(colMeans(is.na(df)) * 100
1)
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General
PromptBeginner5 minmarkdownQuality: 24
library(lmtest) # Breusch-Pagan
Durbin-Watson etc.
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General
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library(car) # Type II/III ANOVA
VIF
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General
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Copy this file
rename it
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General
PromptBeginner5 minmarkdownQuality: 24
- `adjustcolor(col
alpha.f = 0.5)`: easy way to add transparency.
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General
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- colorRamp returns a function mapping [0
1] to RGB matrix.
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General
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- `hcl(h
c
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General
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- `dev.copy(pdf
file = plot.pdf) followed by dev.off()` to save current plot.
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General
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- `rgb(r
g
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General
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- Must call dev.off() to finalize the file. Without it
file may be empty/corrupt.
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General
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- `rect(xleft
ybottom
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Coding & Debugging
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- arrows: code = 1 (head at start)
code = 2 (head at end
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General
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- `persp(x
y
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General
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- `contour(x
y
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