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KARTHIK RAJA
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I am looking for a way to use Excel LINEST, functions in C/C++. Do Microsoft or any third parties offer good tools to enable?? or where can i get the back end coding LINEST function.. to implement in my c program for my controller??
Thank you.
Dec 12 '11 #1
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2 4657 
weaknessforcats 9,208 Recognized Expert Moderator Expert
http://msdn.microsoft.com/ko-kr/libr...ffice.11).aspx
I am not an expert here but this link looks promising.
Dec 12 '11 #2
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Rabbit 12,516 Recognized Expert Moderator MVP
So basically what you want is simple linear regression? There exists formulas to calculate regressions.
Expand|Select|Wrap|Line Numbers
- y=ax+b
- a=r*s(y)/s(x)
- b=average(y)-a*average(x)
- s(z)=square_root(1/(N-1)*sigma((z-average(z))^2))
- n=samplesize
- r=sigma((x-average(x))*(y-average(y)))/square_root(sigma(x-average(x))^2)/square_root(sigma(y-average(y))^2)
That's the first level of formulas you will need. I don't think I need to go over how to calculate an average. r is pearson's coefficent and s is the standard deviation. Sigma is the mathematical symbol for summation where you calculate and add all values together.
Dec 12 '11 #3
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