Help with iterating to get one final value with for loop
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Karan Gill on 6 Nov 2017
Do not use f1(i). Instead use subs: https://www.mathworks.com/help/symbolic/subs.html to substitute a value.
For a full answer, see https://www.mathworks.com/help/symbolic/solve-equations-numerically.html.
And you redeclared f1 as symbolic with syms f1. So you lost your initial value of f1. Then you try f1(i) and it errors.