The Trend function question

wilcohsu · Post by **wilcohsu** » Mon Jan 15, 2007 3:09 am

Is the best fit line equal to regression line at Normal TrendStyles?

Best Regard.

Narcís · Post by **Narcís** » Mon Jan 15, 2007 9:55 am

Hi wilcohsu,

Sorry but I don't understand what do you exactly mean with regression line, could you please give us more information about that?

Thanks in advance.

Narcís · Post by **Narcís** » Mon Jan 15, 2007 11:11 am

Hi wilcohsu,

A colleague pointed me out that the algorithm used to solve system of equations is Gauss elimination which is not the general linear squares solving algorithm. Still, the best fit is defined as minimal value of the residual sum of squares.

Hope this helps!

wilcohsu · Post by **wilcohsu** » Tue Jan 16, 2007 3:09 am

Hi Narcís,

Can you give me fit line of equation or refernece document?

Best Regards!!

Narcís · Post by **Narcís** » Tue Jan 16, 2007 9:09 am

Hi wilcohsu,

We use standard Gaussian elimitation method to calculate coefficients of scaled values. If you are a source code client you can look at Polynoms.cs were all routines are implemented.