General
PromptBeginner5 minmarkdown
- `format(object.size(x)
units = MB)` for human-readable output.
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Showing 24 of 112,495Categories: Creative, General
General
PromptBeginner5 minmarkdown
- `vignette()` lists all vignettes; `vignette(name
package = pkg)` opens a specific one.
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General
PromptBeginner5 minmarkdown
- Update with `setTxtProgressBar(pb
value)`. Close with `close(pb)`.
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General
PromptBeginner5 minmarkdown
- Style 1: rotating `|/-\`
style 2: simple progress. Only style 3 shows percentage.
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General
PromptBeginner5 minmarkdown
- `txtProgressBar(min
max
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General
PromptBeginner5 minmarkdown
- Works with factors
matrices
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General
PromptBeginner5 minmarkdown
- Inverse of `unlist`: given a flat vector and a skeleton list
reconstructs the nested structure.
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General
PromptBeginner5 minmarkdown
- `FUN` argument applies a function to each combination: `combn(5
3
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General
PromptBeginner5 minmarkdown
- **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 minmarkdown
- `modifyList(x
val)` replaces elements of list `x` with those in `val` by **name**.
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General
PromptBeginner5 minmarkdown
- Checks attributes
names
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General
PromptBeginner5 minmarkdown
- `combn(n
m)` or `combn(x
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General
PromptBeginner5 minmarkdown
- Returns `TRUE` or a **character string** describing the difference — NOT `FALSE`. Use `isTRUE(all.equal(x
y))` in conditionals.
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Creative
PromptBeginner5 minmarkdown
- `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 minmarkdown
- Tests **near equality** with tolerance (default `1.5e-8`
i.e.
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General
PromptBeginner5 minmarkdown
- Custom conditions: `stop(errorCondition(msg
class = myError))` then catch with `tryCatch(...
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General
PromptBeginner5 minmarkdown
- `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 minmarkdown
- `tryCatch(expr
error = function(e) e)` returns the error condition object.
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General
PromptBeginner5 minmarkdown
- `tryCatch` **unwinds** the call stack — handler runs in the calling environment
not where the error occurred. Cannot resume execution.
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General
PromptBeginner5 minmarkdown
- `Position(f
x)` returns the **index** of the first match (like `Find` but returns position
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General
PromptBeginner5 minmarkdown
- `Find(f
x)` returns the **first** element where `f(elem)` is `TRUE`. `Find(f
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General
PromptBeginner5 minmarkdown
- `Map(f
...)` is a simple wrapper for `mapply(f
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Creative
PromptBeginner5 minmarkdown
- `Reduce` with `init` adds a starting value: `Reduce(f
x
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General
PromptBeginner5 minmarkdown
- `Filter(f
x)` keeps elements where `f(elem)` is `TRUE`. Unlike `x[sapply(x
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