Operators than can be used expressions include the data operators wNNN and bMMM for referring to wavelength bands, the range operator : used for averaging data, standard arithmetic (+,-,/,* …) and comparison operators (=,>,< …) as well as some mathematical functions (We don't have a way to export this macro.…) and constants (We don't have a way to export this macro.).
Breeze does not validate the provided expression until you click Apply changes to apply it to some data.
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Data Operator
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Description
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wNNN
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Wavelength lookup operator that finds the wavelength band closest to the provided number NNN. This means NNN need not match exactly to find data.
A setting controls how far off a wavelength is allowed to be to be considered a match. If there isn’t matching data an error is displayed when applying the workflow to data. Learn more in Wavelength matching.
Example of this syntax: w700 or w1714.
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bMMM
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Band index operator. MMM represent the one-based index of a wavelength band. For example b1 is the first band, and b20 is the twentieth.
If the index MMM does not exist, Breeze displays an error message.
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:
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Average range operator that returns the average value for a range of wavelength bands.
For example: w1200:w1500 yields average value of all data points between wavelength 1200 nm and 1500 nm. b1:b2 yields average values of the first two bands.
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Expand to see all available operators
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Arithmetic Operator
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Description
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-
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Subtract
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+
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Add
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/
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Divide
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*
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Multiply
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%
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Modulo
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^
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Raised to a power
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Comparison Operator
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Description
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=
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Equal to
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OR
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TRUE if any of the conditions separated by OR is TRUE
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&
AND
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TRUE if all the conditions separated by AND is TRUE
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!=
<>
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Not equal to
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<
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Less than
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<=
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Less than or equal to
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>
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Greater than
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>=
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Greater than or equal to
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Function operator
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Description
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SQRT(N)
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We don't have a way to export this macro.
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SIN(N)
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We don't have a way to export this macro.
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COS(N)
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We don't have a way to export this macro.
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EXP(N)
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We don't have a way to export this macro.
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LOG(N)
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We don't have a way to export this macro.
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LOG10(N)
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We don't have a way to export this macro.
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AVG(N)
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We don't have a way to export this macro.
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ROUND(N)
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We don't have a way to export this macro.
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Constants
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Description
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TRUE
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Always evaluates to TRUE
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FALSE
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Always evaluates to FALSE
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INF
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We don't have a way to export this macro. token value
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PI
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We don't have a way to export this macro. approximated to We don't have a way to export this macro.
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