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

* 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> 2011-10-12 Glenn Morris <rgm@gnu.org>
* ert.texi: Whitespace trivia to make main menu items line up better. * 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 ...@@ -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 typing @kbd{u c @key{RET}} (without specifying new units) produces
@samp{27.7777777778 m/s}. @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 While many of Calc's conversion factors are exact, some are necessarily
approximate. If Calc is in fraction mode (@pxref{Fraction Mode}), then approximate. If Calc is in fraction mode (@pxref{Fraction Mode}), then
unit conversions will try to give exact, rational conversions, but it 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 ...@@ -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 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}. 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 Like the @kbd{u c} command, the @kbd{u b} command treats temperature
@samp{degC} and @samp{K}) as relative temperatures. For example, units as relative temperatures.
@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.
   
@kindex u r @kindex u r
@pindex calc-remove-units @pindex calc-remove-units
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment