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(15C) Multiple Linear Regression for HP-15C
01-28-2014, 11:16 PM
Post: #6
RE: Multiple Linear Regression for HP-15C
(01-27-2014 07:23 PM)Thomas Klemm Wrote:  
(01-27-2014 11:57 AM)Namir Wrote:  What is the size limit on using matrices in the 15C do to multiple regression?
15. But you have to calculate D first, then delete B (DIM 0,0) and only then calculate C and E. My emulator on the iPhone sucks: it will just crash when I try to create a matrix that uses all 64 registers. So I can't tell you what happens when you try with 16 on the real thing.

If you want to avoid entering the data twice you could use \(\sum{+}\) to calculate \(n\), \(\sum{X}\), \(\sum{X^2}\), \(\sum{Z}\), \(\sum{Z^2}\) and \(\sum{XZ}\). In addition to that you have to calculate \(\sum{Y}\), \(\sum{XY}\) and \(\sum{ZY}\) separately.

Cheers
Thomas

Thomas,

My main point is to perform multiple linear regression using the L.R. command. One can always use the equations from the HP-67 Stat Pac I to do a straight forward calculations. Such calculations will require a longer program BUT has the advantage of entering the data once.
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RE: Multiple Linear Regression for HP-15C - Namir - 01-28-2014 11:16 PM



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