Hi, In my precedent question, I had some issues to just display the graph but I had really helpful feedback that allowed me to display the graph I wanted to have. However, I want to see how evolves my graph when I modify a parameter that affects both the level and the slope of the function displayed in the graph. Since now I have something weird as several characters do not affect the function at all including the two parameters affecting the slope (beta and p) but also two other parameters that are thetaB and cB and I cannot understand why. I attach the file I used so that you can fully see the function I have and the command to graph it. Thanks in advance for any tip that might help, Best,
Xavier Koch
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