Linearisation of a signal

[Somnatic]

Hi ... this is probably one of my last questions for a few weeks 🙂

I have a signal which is not exactely linear.

By measuring the deviations, I could extract key values where I know how large this deviation is. Let me say .. in special areas it is at about 10%.

No I have my signal and my key values. Say: I have B(a) and I need B(b) and I have about 30 key values.

Now I need to create a signal or something (I don't know yet - I hope you can tell me 🙂 ) for exactely the values my signal has.

So my signal has a value of 27 .. but I only have key values for 20 and maybe 50. I need to interpolate this somehow and multiply my value (27) with that interpolated value to get the result ... 29

How would I do that ? If you don't understand what I mean .. please ask 🙂

Thank you

[PauloM]

Hi!

If I understood correctly what you need, the Polynomial Interpolation.vi function does the job.

It is in the analyse -- mathematics -- curve fiting group.

You have Y values and X values inputs, where you have to connect the x and y arrays.

Then connect to the x value input the value you wish to calculate.

If this is not what you need please clarify...

Hope this helps,

Paulo

[Somnatic]

seems like you did

now that works perfectly .. and even in an acceptable speed ...

thank you a lot 🙂