![]() ![]() ![]() That is much detail as I want to go into except for the following two links that I used: But how do you come up with a function to fit data? The basic idea is to create a quadratic function and vary the parameters such that the deviation of the actual data from the function is minimized. Perhaps later I will also discuss Logger Pro and Plot. I already discussed how to add a quadratic fit in Excel using the built in tools. Plot 0.997 - a program derived from Sci-Plot.Using the spread sheet (Excel) to manually calculate the best fit parameters. ![]() To test this, I collected some data and used several methods to fit the data: I seem to recall someone claiming that Excel did not do a proper fit. In the back of my head I remember "Don't trust Excel". In a (/dotphysics/2008/09/basics-making-graphs-with-kinematics-stuff-part-ii/), I talked about how to plot kinematics data with a spread sheet and how to fit a quadratic function to the data. ![]()
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