I have one array, say y and another array x. now, y=f(x). The system is a non-linear system. how do i find a equation of nth order for the y and x arrays.

User002 · ‎11-07-2006

Hi,

I have done this using MS excel. In excel i plot a graph for the below values and i drew a trend line for that plot. from that i am able to find the order and equation of best fit. Is there any way to do this in Labview. Give me some examples.

Note:

y----> Speed

x---->Pressure

Please find the attachment for the graph of Pressure Vs Speed.

TCPlomp · ‎11-07-2006

Hi vissw,

Excel has a better function: linestat, I thought it was (I'm not sure because excel is localized for these functions), maybe linest.

In LabVIEW look foor 'general polynomial fit' it will do what you want, but I'm not sure it is present inevery LV version.

Ton

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User002 · ‎11-07-2006

Hi TonP,

Thanks a lot, It seems to be working.

LabVIEW

I have one array, say y and another array x. now, y=f(x). The system is a non-linear system. how do i find a equation of nth order for the y and x arrays.

I have one array, say y and another array x. now, y=f(x). The system is a non-linear system. how do i find a equation of nth order for the y and x arrays.

Re: I have one array, say y and another array x. now, y=f(x). The system is a non-linear system. how do i find a equation of nth order for the y and x arrays.

Re: I have one array, say y and another array x. now, y=f(x). The system is a non-linear system. how do i find a equation of nth order for the y and x arrays.