[12C] Linear Regression - Printable Version +- HP Forums (https://www.hpmuseum.org/forum) +-- Forum: HP Software Libraries (/forum-10.html) +--- Forum: General Software Library (/forum-13.html) +--- Thread: [12C] Linear Regression (/thread-12224.html) [12C] Linear Regression - Gamo - 01-19-2019 06:01 AM HP-10C 11C and 15C came with [L.R.] (Linear Regression) function. HP-12C don't have this function this program will do the L.R. function based on the formula shown on the HP-11C manual on page 63 To use this L.R. function program, use the [Σ+] key to accumulate the statistic of a series of two or more data pair. Then execute [R/S] Procedure: [R/S] display Y-intercept on stack register X [X<>Y] display Slope on stack register Y ------------------------------------------------------------ Program: L.R. for HP-12C Quote:RCL 1 RCL 6 x RCL 2 RCL 4 x - RCL 1 RCL 3 x RCL 2 ENTER x - ÷ STO 0 -------------------------- RCL 4 RCL 3 x RCL 2 RCL 6 x - RCL 1 RCL 3 x RCL 2 ENTER x - ÷ RCL 0 X<>Y Remark: For HP-12C Platinum Simply remove [ENTER] [x] to [X^2] And remove [STO] 0 [RCL] 0 and [X<>Y] Gamo RE: [12C] Linear Regression - Gene - 01-19-2019 01:46 PM Gamo, The HP 12c has linear regression built in. The slope has to be computed by calculating the difference in the predicted Y-values for two X-values. This is covered in the HP-12c manual and in the learning module. HP-12c learning module RE: [12C] Linear Regression - Dieter - 01-19-2019 01:57 PM (01-19-2019 01:46 PM)Gene Wrote:  The HP 12c has linear regression built in. The slope has to be computed by calculating the difference in the predicted Y-values for two X-values. This has already been discussed here, cf. http://www.hpmuseum.org/forum/thread-6185-post-55342.html#pid55342 0  g [y^, r] => intercept 1  g [y^, r] => slope + intercept So this... Code: ```1 y^, r 0 y^, r x<>y R↓ - LstX``` ...returns the y-intercept in X, the slope in Y and the correlation coefficient in Z and T. Also post #8 in that thread has essentially the same program as Gamo's, just without the double calculation of the determinant. Note: Gamo, I have sent a PM earlier today as you originally posted this to the Articles forum where no replies are possible. Dieter RE: [12C] Linear Regression - Gamo - 01-20-2019 12:19 AM Thanks to Dieter and Gene The 12C learning module explain in detail and same as Dieter mention. No wonder that 12C came with both X^,r and Y^,r Gamo