How to convert symbolic array into a vector

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SALMAN KHAN
SALMAN KHAN 2021-9-6
评论： Star Strider 2021-9-6
Using symbolic matlab, when I calculate values of a function f(x) it given me a symbolic array, but I want this in form of a vector so that I can plot L vs x?
x = 0:0.01:1 L = f(2) + df(2)*(x-2)

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Star Strider
Star Strider 2021-9-6
Ran in:
I am not certain what you want to do, or the specific problem.
It might be easiest to create the ‘L’ assignment as a function using matlabFunction, then evaluate it numerically —
syms f(x) df(x) x
f(x) = x^2;
df = diff(f);
L = f(2) + df(2)*(x-2)
L = 
Lfcn = matlabFunction(L)
Lfcn = function_handle with value:
@(x)x.*4.0-4.0
x = linspace(0, 5, 10);
Lval = Lfcn(x)
Lval = 1×10
-4.0000 -1.7778 0.4444 2.6667 4.8889 7.1111 9.3333 11.5556 13.7778 16.0000
figure
plot(x, Lval)
grid
Make appropriate changes to get the result you want.
.

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