From 2be4956d356f48ae65127679994a6ef6fa208914 Mon Sep 17 00:00:00 2001 From: Jay Belanger Date: Wed, 12 Oct 2011 21:50:58 -0500 Subject: [PATCH] * calc.texi (Basic Operations on Units): Discuss temperature conversion (`u t') alongside with other unit conversions ('u c'). --- doc/misc/ChangeLog | 5 +++++ doc/misc/calc.texi | 28 +++++++++++++++------------- 2 files changed, 20 insertions(+), 13 deletions(-) diff --git a/doc/misc/ChangeLog b/doc/misc/ChangeLog index 93f722f806e..294c6472000 100644 --- a/doc/misc/ChangeLog +++ b/doc/misc/ChangeLog @@ -1,3 +1,8 @@ +2011-10-13 Jay Belanger + + * calc.texi (Basic Operations on Units): Discuss temperature + conversion (`u t') alongside with other unit conversions ('u c'). + 2011-10-12 Glenn Morris * ert.texi: Whitespace trivia to make main menu items line up better. diff --git a/doc/misc/calc.texi b/doc/misc/calc.texi index f732eff5690..5a1ee872a2b 100644 --- a/doc/misc/calc.texi +++ b/doc/misc/calc.texi @@ -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 -- 2.39.2