General
PromptBeginner5 minmarkdownQuality: 24
- Update with `setTxtProgressBar(pb
value). Close with close(pb)`.
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General
PromptBeginner5 minmarkdownQuality: 24
- Style 1: rotating |/-\
style 2: simple progress. Only style 3 shows percentage.
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General
PromptBeginner5 minmarkdownQuality: 24
- Works with factors
matrices
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General
PromptBeginner5 minmarkdownQuality: 24
- `txtProgressBar(min
max
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Data
PromptBeginner5 minmarkdownQuality: 24
- `relist(flesh
skeleton) — flesh` is the flat data
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General
PromptBeginner5 minmarkdownQuality: 28
- Does add new names not in x — it uses x[names(val)] <- val internally
so any name in val gets added or replaced.
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General
PromptBeginner5 minmarkdownQuality: 28
- Inverse of unlist: given a flat vector and a skeleton list
reconstructs the nested structure.
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General
PromptBeginner5 minmarkdownQuality: 24
- `modifyList(x
val) replaces elements of list x with those in val` by name.
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General
PromptBeginner5 minmarkdownQuality: 24
- Checks attributes
names
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General
PromptBeginner5 minmarkdownQuality: 24
- FUN argument applies a function to each combination: `combn(5
3
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General
PromptBeginner5 minmarkdownQuality: 24
- `combn(n
m) or combn(x
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General
PromptBeginner5 minmarkdownQuality: 24
- Tests near equality with tolerance (default 1.5e-8
i.e.
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General
PromptBeginner5 minmarkdownQuality: 28
- Returns TRUE or a character string describing the difference — NOT FALSE. Use `isTRUE(all.equal(x
y))` in conditionals.
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General
PromptBeginner5 minmarkdownQuality: 24
- Custom conditions: `stop(errorCondition(msg
class = myError)) then catch with tryCatch(...
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General
PromptBeginner5 minmarkdownQuality: 28
- tryCatch unwinds the call stack — handler runs in the calling environment
not where the error occurred. Cannot resume execution.
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Creative
PromptBeginner5 minmarkdownQuality: 28
- `tryCatch(expr
warning = function(w) {...}) catches the first warning and exits. Use withCallingHandlers + invokeRestart(muffleWarning)` to suppress warnings but continue.
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General
PromptBeginner5 minmarkdownQuality: 24
- `tryCatch(expr
error = function(e) e)` returns the error condition object.
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General
PromptBeginner5 minmarkdownQuality: 24
- `Position(f
x) returns the index of the first match (like Find` but returns position
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General
PromptBeginner5 minmarkdownQuality: 28
- lengths(x) returns the length of each element of a list. Equivalent to `sapply(x
length)` but faster (implemented in C).
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General
PromptBeginner5 minmarkdownQuality: 24
- `Find(f
x) returns the first element where f(elem) is TRUE. Find(f
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General
PromptBeginner5 minmarkdownQuality: 24
- `Map(f
...) is a simple wrapper for mapply(f
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Creative
PromptBeginner5 minmarkdownQuality: 24
- Reduce with init adds a starting value: `Reduce(f
x
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General
PromptBeginner5 minmarkdownQuality: 24
- `Filter(f
x) keeps elements where f(elem) is TRUE. Unlike x[sapply(x
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General
PromptBeginner5 minmarkdownQuality: 24
- `Reduce(f
x
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