calc: HMS Formats
7.7.6 HMS Formats
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The ‘d h’ (‘calc-hms-notation’) command controls the display of HMS
(hours-minutes-seconds) forms. It prompts for a string which consists
basically of an “hours” marker, optional punctuation, a “minutes”
marker, more optional punctuation, and a “seconds” marker. Punctuation
is zero or more spaces, commas, or semicolons. The hours marker is one
or more non-punctuation characters. The minutes and seconds markers
must be single non-punctuation characters.
The default HMS format is ‘@ ' "’, producing HMS values of the form
‘23@ 30' 15.75"’. The format ‘deg, ms’ would display this same value as
‘23deg, 30m15.75s’. During numeric entry, the ‘h’ or ‘o’ keys are
recognized as synonyms for ‘@’ regardless of display format. The ‘m’
and ‘s’ keys are recognized as synonyms for ‘'’ and ‘"’, respectively,
but only if an ‘@’ (or ‘h’ or ‘o’) has already been typed; otherwise,
they have their usual meanings (‘m-’ prefix and ‘s-’ prefix). Thus, ‘5
"’, ‘0 @ 5 "’, and ‘0 h 5 s’ are some of the ways to enter the quantity
“five seconds.” The ‘'’ key is recognized as “minutes” only if ‘@’ (or
‘h’ or ‘o’) has already been pressed; otherwise it means to switch to
algebraic entry.