GraphPad Curve Fitting Guide

Graphing the linear-quadratic model

Graphing the linear-quadratic model

Previous topic Next topic No expanding text in this topic  

Graphing the linear-quadratic model

Previous topic Next topic JavaScript is required for expanding text JavaScript is required for the print function Mail us feedback on this topic!  

The graph on the left below uses a linear Y axis. The graph on the right uses a logarithmic Y axis. This was done in GraphPad Prism by making the change in the Format Axis dialog. The nonlinear regression "saw" the original data where the Y values were fractions (not logarithm of fractions; that would require a modified model).

Prism does not include variations of the model where the Y values are the logarithms of fractions or percentages of cells dead or alive, but it wouldn't be hard to clone the built-in equations and modify them.