fimplicit function dont work for some reason

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fimplicit function dont work for some reason

Answer 1

[Walter Roberson]

fimplicit requires R2016b or later. If you do have R2016b or later, please show us your code.

[Pape Traore]

Here it is

[Walter Roberson]

In the second of those, because a function handle is not being created, that code can only work if you had previously used

syms x

so that the assignment creates a symbolic expression that MATLAB can plot.

If you had not used "syms x" and had not assigned anything to x, then your assignment to "fun" will fail because of the undefined x. If you had assigned something numeric to x then the assignment to fun would work but fimplicit() would fail because fimplicit() is not defined when the first parameter is numeric.