AvaRaman Operating manual AvaSoft Raman 7.3 November 2008

You can refer to the other history channels with the predefined variables F1 to F8. If you want to
use data from the spectrometer, you will need to assign other history channels to e.g. wavelength
values or integrals. The following script defines the function value for F3 as the quotient of F1 and
F2.
Function F3(value)
F3=F1/F2
End Function
Please do not refer to the function value for the script itself. You can also not refer to other
functions, if these are themselves assigned to a script. This will result in a scripting run-time error.
If you want to use code from another script, please copy the necessary lines from that script into
the one your working with.
Please understand that a script is executed by an interpreter, on a line by line basis. If you make a
syntax error in your script, it will usually only show at the moment the line with the error is
executed, as a run-time error.
Nothing will stop you, for instance, from entering the following script for function 3:
Function F3(value)
F3=F1/0
End Function
Running this script will result in
the run-time error at the right:
If you refer to channels that are undefined (Function Type ‘None’), they will be handled as
uninitialized variables by VBScript, with value 0. This is the case for all uninitialized variables you
might use in your scripts.
Finally, a small example to monitor the integral of a peak between 522 cm -1 and 550 cm -1 , in which
an offset is subtracted. The offset area is the area below of the straight line between the output at
522 cm -1 and the output at 550 cm -1 .
F1 is defined as a user defined input function: m(522)
F2 is defined as a user defined input function: m(550)
F3 is defined as the zero-based integral between 522 cm -1 and 550 cm -1 .
The script for function F4 can then be written as:
Function F4(value)
If F1 > F2 Then
offset = 28*(F2 + (0.5*(F1-F2)))
Else
offset = 28*(F1 + (0.5*(F2-F1)))
End If
F4 = F3 - offset
End Function
48 AvaRAMAN manual.doc Nov-08
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