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HrData( ), JrData( ), SrData( ) |
  
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HrData( ), JrData( ), SrData( ) |
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The functions return the value of an MCL expression, which is passed into the function through the first argument.
Syntax
HrData(cMCLExpr,nBackRaces,'fCondition',nDefaultVal)
JrData(cMCLExpr,nBackRaces,'fCondition',nDefaultVal)
SrData(cMCLExpr,nBackRaces,'fCondition',nDefaultVal)
Returns
The same data type as MCL expression passed into the first argument.
Example
HrData('HrWeight( )/HrBodyweight( )',1)
This function calculates the Loading-Bodyweight ratio of a horse in last race. Although the function can be rewritten as HrWeight(1)/HrBodyweight(1) and identical results will be returned, however, the speed of latter expression will be lower than the example. It is because in the latter expression HrWeight( ) and HrBodyweight( ) will each walk though the past records once to retrieve corresponding information respectively while the HrData( ) function of the example walks through the past record only once. When the condition ( fCondition ) getting a target race is complicated, the speed improvement of the HrData( ) function will be obvious.
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