XML: Macros - Extracting Digits: Difference between revisions
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(New page: '''== Extract Digits Macro ==''' Quite frequently it is necessary to extract the ''nth'' digit of a number for any number of reasons. This XML Macro is very handy for the purpose, as it i...) |
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''' | ''' Extract Digits Macro ''' | ||
Quite frequently it is necessary to extract the ''nth'' digit of a number for any number of reasons. | Quite frequently it is necessary to extract the ''nth'' digit of a number for any number of reasons. | ||
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@ExtDigit(lVar,4,2) returns 2 | @ExtDigit(lVar,4,2) returns 2 | ||
[[ | [[category:Aircraft design]] | ||
[[ | [[category:Gauges]] | ||
Revision as of 13:15, 12 June 2008
Extract Digits Macro
Quite frequently it is necessary to extract the nth digit of a number for any number of reasons. This XML Macro is very handy for the purpose, as it is "universal" and does not care what the number is...
<Macro Name="ExtDigit">
@1 sp0
@3 0 >
if{ l0 10 @3 pow * sp0 }
l0 int 10 @2 pow % 10 @2 1 - 0 max pow / int
@ExtDigit((ALGVar),nDigit,nDecimals)</math>
Where:
(ALGVar) is the A,L or G var from where to extract the digit
nDigit is the position of the digit to extract, starting from the right.
nDecimals is the number of decimals to be included in the calcs.
For instance
for a value of 123.456789999999
@ExtDigit(lVar,1,0) means I want to extract the right most, discarding the decimals. It returns 3
@ExtDigit(lVar,2,0) returns 2 ; @ExtDigit(lVar,3,0) returns 1 and
@ExtDigit(lVar,4,0) and up returns 0
using decimals:
@ExtDigit(lVar,1,2) returns 5
@ExtDigit(lVar,2,2) returns 4
@ExtDigit(lVar,3,2) returns 3
@ExtDigit(lVar,4,2) returns 2
