Commit 2be4956d authored by Jay Belanger's avatar Jay Belanger

* calc.texi (Basic Operations on Units): Discuss temperature

  conversion (`u t') alongside with other unit conversions ('u c').
parent fd8dea03
2011-10-13 Jay Belanger <jay.p.belanger@gmail.com>
* calc.texi (Basic Operations on Units): Discuss temperature
conversion (`u t') alongside with other unit conversions ('u c').
2011-10-12 Glenn Morris <rgm@gnu.org>
* ert.texi: Whitespace trivia to make main menu items line up better.
......
......@@ -27748,6 +27748,19 @@ the above example, entering the units expression @samp{100 km/hr} and
typing @kbd{u c @key{RET}} (without specifying new units) produces
@samp{27.7777777778 m/s}.
@kindex u t
@pindex calc-convert-temperature
@cindex Temperature conversion
The @kbd{u c} command treats temperature units (like @samp{degC} and
@samp{K}) as relative temperatures. For example, @kbd{u c} converts
@samp{10 degC} to @samp{18 degF}: A change of 10 degrees Celsius
corresponds to a change of 18 degrees Fahrenheit. To convert absolute
temperatures, you can use the @kbd{u t}
(@code{calc-convert-temperature}) command. The value on the stack
must be a simple units expression with units of temperature only.
This command would convert @samp{10 degC} to @samp{50 degF}, the
equivalent temperature on the Fahrenheit scale.
While many of Calc's conversion factors are exact, some are necessarily
approximate. If Calc is in fraction mode (@pxref{Fraction Mode}), then
unit conversions will try to give exact, rational conversions, but it
......@@ -27818,19 +27831,8 @@ The @kbd{u b} (@code{calc-base-units}) command is shorthand for
stack into @code{base} units. If @kbd{u s} does not simplify a
units expression as far as you would like, try @kbd{u b}.
The @kbd{u c} and @kbd{u b} commands treat temperature units (like
@samp{degC} and @samp{K}) as relative temperatures. For example,
@kbd{u c} converts @samp{10 degC} to @samp{18 degF}: A change of 10
degrees Celsius corresponds to a change of 18 degrees Fahrenheit.
@kindex u t
@pindex calc-convert-temperature
@cindex Temperature conversion
The @kbd{u t} (@code{calc-convert-temperature}) command converts
absolute temperatures. The value on the stack must be a simple units
expression with units of temperature only. This command would convert
@samp{10 degC} to @samp{50 degF}, the equivalent temperature on the
Fahrenheit scale.
Like the @kbd{u c} command, the @kbd{u b} command treats temperature
units as relative temperatures.
@kindex u r
@pindex calc-remove-units
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