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21387: zcalc documentation for precision features

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Peter Stephenson 2005-06-27 10:26:13 +00:00
parent a7720df9a3
commit 40b402bf29
2 changed files with 30 additions and 1 deletions
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ChangeLog
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@ -1,3 +1,8 @@
2005-06-27 Peter Stephenson <pws@csr.com>
* 21387: Doc/Zsh/contrib.yo: document the precision features
in zcalc.
2005-05-30 Oliver Kiddle <opk@zsh.org>
* 21266: Completion/Unix/Command/_mh: improve completion of sequences

26
Doc/Zsh/contrib.yo
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@ -1381,7 +1381,9 @@ An extra facility is provided for changing the default output base. Use,
for example, `tt([#16])' to display hexadecimal output preceded by an
indication of the base, or `tt([##16])' just to display the raw number in
the given base. Bases themselves are always specified in decimal.
`tt([#])' restores the normal output format.
`tt([#])' restores the normal output format. Note that setting an output
base suppresses floating point output; use `tt([#])' to return to normal
operation.
The output base can be initialised by passing the option `tt(-#)var(base)',
for example `tt(zcalc -#16)' (the `tt(#)' may have to be quoted, depending
@ -1393,6 +1395,28 @@ stored locally in the first element of the array tt(psvar), which can be
referred to in tt(ZCALCPROMPT) as `tt(%1v)'. The default prompt is
`tt(%1v> )'.
The output precision may be specified within zcalc by special commands
familiar from many calculators:
startitem()
item(tt(norm))(
The default output format. It corresponds to the printf tt(%g)
specification. Typically this shows six decimal digits.
)
item(tt(sci) var(digits))(
Scientific notation, corresponding to the printf tt(%g) output format with
the precision given by var(digits). This produces either fixed point or
exponential notation depending on the value output.
)
item(tt(fix) var(digits))(
Fixed point notation, corresponding to the printf tt(%f) output format with
the precision given by var(digits).
)
item(tt(eng) var(digits))(
Exponential notation, corresponding to the printf tt(%E) output format with
the precision given by var(digits).
)
enditem()
See the comments in the function for a few extra tips.
)
findex(zed)