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derivative plots

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derivative plots

I would like to take a data series from excel (experimental measurements of absorbance (y) vs temperature (x)) and plot the derivative curve. Can I somehow get the function expression from the data?
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derivative plots

You can use "linfit" to find coefficients for functions that might make up a complex function if you have a data array.

If you have candidate functions in mind but need to determine internal parameters as well as coefficients you can try "genfit".

It is also possible to create a solve block and use "Minerr" for this type of purpose.

On the other hand, if you just want the function in order to get the derivatives, you might consider a "spline fit". That's fairly easy to do and you can get numerical derivatives of the resulting interpolating function.
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