Custom inverse prediction for quadratic (and higher orders) modelsIn the fit curve platform the option to have a inverse prediction is not available for quadratic models. It would be nice to add it. Of course if possible to include cubic and others it would be top.
Advanced Statistical ModelingBasic Data Analysis and ModelingData Exploration and VisualizationRe: Custom inverse prediction for quadratic (and higher orders) models@SamGardner , would it be possible to have both solutions in the output ? Or the user may choose before if he wants the result for the 1st or 2nd solution ?
Re: Custom inverse prediction for quadratic (and higher orders) models - Status changed to: Needs Info@friedrich thank you for your suggestion. I have a follow up question. With a quadratic or higher order polynomial model, there is a possibility that that the fitted function will not be monotonic, and for a given Y value there could be two possible inverse solutions. How would you propose that situation be handled?
Re: Custom inverse prediction for quadratic (and higher orders) models - Status changed to: AcknowledgedHi @friedrich, thank you for your suggestion! We have captured your request and will take it under consideration.
Re: Custom inverse prediction for quadratic (and higher orders) modelsI agree this would be helpful! I ran a standard curve with x as concentration and y as fluorescence. I now would like to predict concentration when given RFU. A 3rd-order polynomial fits my data well. However, I have to enter the fluorescence value one at a time using this workaround: https://community.jmp.com/t5/Discussions/inverse-prediction-using-quadratic-model/m-p/221830#M44262
I agree with friedrich ^ that all solutions could be output, or user could choose to display all real number solutions.
