# Misc R helper functions

### Description

`eqc(x, number=4, overlap=1/sqrt(length(x)))`

an abbreviation for `equal.count`

with useful defaults.
Often useful for Lattice plots.

`grep.b(pattern, x)`

performs a `grep`

, but returns the
result as a logical (boolean, thus the .b) vector along `x`

rather than as an integer vector indices. Often useful for Lattice
`subset`

calls.

`grep.s(pattern, x)`

performs `grep(pattern, x, value=TRUE)`

and
thus returns the matched strings rather than their indices.

`orderavg(x, by)`

orders the observations from vector `x`

using the equal-weighted ranking criteria given in matrix `by`

(which has `length(x)`

rows and `n`

colums), a `by`

vector is coerced.
The ranks computed from each matrix column are summed row-wise,
the resulting vector is sorted according to these rank sums, and returned.
This function can be used to pair elements from two vectors (by ranking
them both by equivalent criteria).

`tableNA`

abbreviation for `table`

with an additional
argument `exclude = NULL`

so that `NA`

and `NaN`

values
are tabulated as well.

`or.else(x, alternative = 0)`

returns `x`

where available
and `alternative`

where `is.na(x)`

.
`alternative`

can be a scalar or vector and should have the same
mode as `x`

.

`printn(x, digits)`

prints name and value of `x`

. If
the optional argument `digits`

is used, `x`

will be coerced to
numeric and formatted with `digits`

digits precision.
Useful for quick-and-dirty debugging output.

`tracebck()`

is like `traceback`

except that it returns
(rather than prints) only the first line of each frame. This is useful
because the argument lists of calls often contain large data objects
which clutter the output of `traceback`

and make it very
difficult to read.

### Details

Type the name of a function to see its source code for details.

### Author(s)

Lutz Prechelt prechelt@inf.fu-berlin.de

### See Also

`equal.count`

,
`grep`

,
`order`

,
`ifelse`

,
`table`

,
`traceback`

.

### Examples

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