how do I evaluate the value of an expression?

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Matteo Masto
Matteo Masto 2019-11-2
回答： Joshua Hodson 2021-2-10
x = [-2:0.01:1];
f = (x.^2) -x +1 - (exp(-x));
x1 = -1.9;
f(x1)
this gives me the error:
Array indices must be positive integers or logical values
How can I manage to extract the right value of f at x1?
thanks!

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采纳的回答

Star Strider
Star Strider 2019-11-2
Try this:
f = @(x) (x.^2) -x +1 - (exp(-x));
x1 = -1.9;
fx1 = f(x1)
creating an anonymous function and producing:
fx1 =
-0.175894442279269
See the documentation section on Anonymous Functions for details.

更多回答（1 个）

Joshua Hodson
Joshua Hodson 2021-2-10
6x4>32-3

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