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Specifies the operator to be used in the formula. The options are as follows:
Operator | Description |
---|---|
+ | Addition |
- | Subtraction |
* | Multiplication |
/ | Division |
^ | Power |
> | Larger Than |
< | Smaller Than |
>= | Larger or Equal |
<= | Smaller or Equal |
= | Equal |
<> | Not equal |
and | Conjunction |
or | Disjunction |
Remember that the logical operators (last 4 lines) return data which is either 1 (result is true) or 0 (result is false).
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When Application is set to f(F) the available options are as follows:
Function | Description |
---|---|
-- | negative of the input |
not | negation of input : returns 0 where input values are non-zero, 1 otherwise |
sgn | sign of the input : -1 where input is negative, 1 where positive, 0 where null |
int | integer part of the input |
abs | absolute part of the input |
sqrt | square root of the input |
log | natural logarithm of the input |
log10 | logarithm base 10 of the input |
exp | exponential of the input |
sin | sine of input (must be in radians) |
cos | cosine of input (must be in radians) |
tan | tangent of input (must be in radians) |
asin | arc sine of input (must be in radians) |
acos | arc cosine of input (must be in radians) |
atan | arc tangent of input (must be in radians) |
coslat | cosine of the latitude of the input grid points |
sinlat | sine of the latitude of the input grid points |
count | the number of fields within the input |
mean | mean field of the input. Apply to GRIB input only |
rms | root mean square field of the input. Apply to GRIB input only |
stdev | standard deviation field of the input. Apply to GRIB input only |
sum | sum field of the input |
var | variance field of the input. Apply to GRIB input only |
Note that some options apply only to GRIB icon input.
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When Application is set to f(F,G) the available options are as follows:
Function | Description |
---|---|
max | returns the maximum of the two input elements: a GRIB/Geopoints of the maximum of the input GRIB/Geopoints at each grid point or location. Output GRIB data contain the same number of fields as the maximum is taken on a field by field basis |
min | as above but returning the minimum |
covar | returns a GRIB field equal to the covariance of the input fieldsets. Apply only to GRIB input |
div | returns the integer result of division of F by G |
merge | returns a single GRIB fieldset composed of all the fields in the input GRIB fieldsets. Apply only to GRIB input |
mod | returns the result of F modulo G |
interpolate | returns a set of Geopoints at the locations of the Geopoints specified by G, with values calculated by interpolation at those points from the first field of fieldset F |
When Application is set to f(F,x) or f(x,F) the available options are as follows:
max | returns the maximum of the two input elements: a GRIB/Geopoints of the maximum of the input GRIB/Geopoints at each grid point or location and the specified location. Output GRIB data contain the same number of fields as the maximum is taken on a field by field basis |
min | as above but returning the minimum |