how to calculate a linear trend

[lizardjuice]

Can someone point out how I can take a known set of x-values and a known set of y-values and return a linear trend? Excel provides a TREND() function but I need to do this on a server-side object, preferably in VB.

 

[qbasicking]

Go through each point and find the equation for the line that connects them.
Then you could simply average them out.

 

[lizardjuice]

hmm - I'm not sure that's what I'm looking for. The function needs to suggest a future trend based on the known values from the past.

 

[johnwm]

Most books on Statistics will show how to calculate the line equation for linear trend (or regression) in the form 'y = mx + c'. Extrapolation of that data just needs you to supply the appropriate x value to the equation.



________________________________________________________________
If you want to get the best response to a question, please check out FAQ222-2244 first

'If we're supposed to work in Hex, why have we only got A fingers?'

 

[lizardjuice]

Thank you johnwm - I'll start from there.