Matlab Function Fitting: Tips & Tricks

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Synesthesia
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Hello all,

How do people generally fit data in Matlab? I am trying to fit an exponential decay and it doesn't look straightforward. I am looking this up at the moment, but maybe people can give me good answers or starting points here.

Thank you!
 

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Think this is fminspleas
 
I usually use polyfit with the appropriate logarithms.
 

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