Subtract array position from channel

[Leillo]

Hi Guys

I am calculating offsets from a set of channels and saving these offsets in an array. Then, I am trying to subtract an offset (which is in an given position in the array) from a channel but it doesn't work as the result is a channel with NO values....

This is what I am typing in VBS and doesn't work:

Call Calculate("Ch(""ResultVBS"") = Ch(""Strg_Angle"")-offset(3)")   'offset is the array of offset and 3 is a random position

or

Call Calculate("Ch(""ResultVBS"") = Ch(""Strg_Angle"")-Cint(offset(3))")  

Things that work but are of NO use to this specific script:

Call Calculate("Ch(""ResultVBS"") = Ch(""Strg_Angle"")-statarithmean")

Call Calculate("Ch(""ResultVBS"") = Ch(""Strg_Angle"")-13") 'being 13 a random value

Things that DON'T work and I don't understand why:

Dim a

a=13

Call Calculate("Ch(""ResultVBS"") = Ch(""Strg_Angle"")-a")

Can someone help?

Thanks

[Walter_Rick · Accepted solution]

Hello Leillo,

A is a VBS variable and the DIAdem command Calculate doesn’t know these kind of variables. The solution is to use the interpreted content of a.

Dim a

a=13

Call Calculate("Ch(""ResultVBS"") = Ch(""Strg_Angle"")-" & a & "")

Alternatively you can use the DIAdem command “ChnOffset” (ANALYSIS -> Base functions -> Offset correction)

Greetings

Walter

[Leillo]

Thank you very much!