oph_predicate2¶

Description¶

Behaviour

It evaluates a predicate2. For each item of input array, if ‘expression0’ satisfies ‘comparison’ then ‘expression1’ is executed, else ‘expression2’ is executed.

Parameters

• input measure type : Ophidia typing. Supported types are: ‘oph_double’; ‘oph_float’; ‘oph_long’; ‘oph_int’; ‘oph_short’; ‘oph_byte’.
• output measure type : Ophidia typing. Supported types are: ‘oph_double’; ‘oph_float’; ‘oph_long’; ‘oph_int’; ‘oph_short’; ‘oph_byte’.
• measure : input measure.
• expression 0 : first expression.
• comparison : condition to be verified. Only one of the following values are allowed:
  • ‘OPH_MORE_THAN_ZERO’, ‘OPH_POSITIVE’, ‘>0’ or ‘>’ in case expression 1 has to evaluated only if input value is positive;
  • ‘OPH_LESS_THAN_ZERO’, ‘OPH_NEGATIVE’, ‘<0’ or ‘<’ in case expression 1 has to evaluated only if input value is negative;
  • ‘OPH_EQUAL_TO_ZERO’, ‘OPH_ZERO’, ‘==0’ or ‘0’ in case expression 1 has to evaluated only if input value is zero;
  • ‘OPH_MORE_OR_EQUAL_TO_ZERO’, ‘OPH_NOT_NEGATIVE’, ‘>=0’ or ‘>=’ in case expression 1 has to evaluated only if input value is not negative;
  • ‘OPH_LESS_OR_EQUAL_TO_ZERO’, ‘OPH_NOT_POSITIVE’, ‘<=0’ or ‘<=’ in case expression 1 has to evaluated only if input value is not positive;
  • ‘OPH_NOT_EQUAL_TO_ZERO’, ‘OPH_NOT_ZERO’, ‘!=0’, ‘!=’, ‘<>0’ or ‘<>’ in case expression 1 has to evaluated only if input value is not zero;
  • ‘OPH_NULL’, ‘NULL’, ‘NAN’, ‘MISSED’, ‘MISS’, ‘ISNULL’, ‘ISNAN’ or ‘ISMISSED’ in case expression 1 has to evaluated only for missing values.
• expression 1 : expression executed if expression 0 satisfies comparison.
• expression 2 : expression executed if expression 0 does not satisfy comparison.
• occurrence : if is set to a number ‘n’ then expression 1 is evaluated only for the ‘n’-th of the condition; otherwise the expression 2 is evaluated. Use ‘first’ or ‘begin’ for the first occurrence. Use ‘last’ or ‘end’ for the last occurrence. Use ‘all’ to skip this check (default).

Return type

Binary-array.

Examples

Identify measures with temperature values greater than 300 K.

oph_predicate('OPH_DOUBLE','OPH_DOUBLE',measure,'x-300','>0','1','0')

Operation type

simple

Arguments¶