data stored at different rates

[smiffy]

I need to align two data sets that have been stored at different rates to enable me to use the CTNV function to clip unwanted data.

Ch("new") = Ch("[1]/z")+CTNV((Ch("[1]/Velocity")<17))

this code clips the altitude (z) data when velocity is below 17, this works fine because both channels were store at 1Hz

Ch("new") = Ch("[1]/A2R1")+CTNV((Ch("[1]/Velocity")<17))

this code doesn't do what I want because strain gauge data (A2R1) was stored at 240Hz and velocity at 1Hz.

I'm sure there is a simple solution (probably several of them) but I'm pretty new to DIAdem and it's got me stuffed!

[SA_DC]

Hi smiffy,

you can use the analysis function "linear mapping" at the "curve fittings" to bring the 2 channels to the same data rate.

use the time channel from the other channel as "interpolation channel"

regards sven

[Twigeater]

Hello smiffy!

One keyword for sven's suggestion is 'ChnMapLinCalc'. Look for this command in the DIAdem help or search this forum to get some examples.

Matthias

[smiffy]

Thank you.

That was too easy!

[smiffy]

Thank you very much