One line PredY ? Statistics 2Var - Printable Version +- HP Forums (https://www.hpmuseum.org/forum) +-- Forum: HP Calculators (and very old HP Computers) (/forum-3.html) +--- Forum: HP Prime (/forum-5.html) +--- Thread: One line PredY ? Statistics 2Var (/thread-16715.html) One line PredY ? Statistics 2Var - Schraf - 04-21-2021 05:21 PM Hello. No problem finding the value of y using the method below: C1:={750,850} --> x1 and x2 C2:={55,65} --> y1 and y2 Predict y3 knowing x3=813.7 : PredY(813.7) --> 61.37 (linear regression) It's also ok when I use the data columns in Statistics 2Var App. But in the documentation we can read: PredY(mode, x, parameters) mode = 1 for linear regression (OK ?) x = 813.7 (OK ?) parameters ?? I try {{750,850},{55,65}} or the slope and Y-intercept but it does not work. Do you have an idea ? RE: One line PredY ? Statistics 2Var - roadrunner - 04-21-2021 10:44 PM If you are not in the spreadsheet app type it like this: Spreadsheet.PredY(1,X,{slope,intercept}) -road RE: One line PredY ? Statistics 2Var - Wes Loewer - 04-22-2021 04:36 AM Just to clarify, there are two different PredY functions. Statistics_2Var.PredY() which appears to only take 1 X parameter and uses the fit type selected in Symb screen. Spreadsheet.PredY() which takes the 3 parameters that you were trying to use. RE: One line PredY ? Statistics 2Var - Schraf - 04-22-2021 07:00 AM I understand my mistake, there were several functions PredY... Thanks RE: One line PredY ? Statistics 2Var - jonmoore - 04-22-2021 12:21 PM (04-22-2021 04:36 AM)Wes Loewer Wrote:  Just to clarify, there are two different PredY functions. Statistics_2Var.PredY() which appears to only take 1 X parameter and uses the fit type selected in Symb screen. Spreadsheet.PredY() which takes the 3 parameters that you were trying to use. I think this is one of those areas where the interactive help cards could be improved by including the Statistics and Spreadsheet prepend details. A very simple change but the clarity will be greatly improved.