Trying to write a function using @

I am trying to write this function in my code but I am getting an invalid MATLAB syntax error. The equation is g(x) = sin(x)/x

Here is what I have:

g = @x sin(x)/x
g(1)
g(pi)

The g(1) and g(pi) are to be used calling the function to solve.

Answer 1

[Stephen23]

g = @(x) sin(x)/x;
%    ^ ^ you forgot these
g(1)

ans = 0.8415

g(pi)

ans = 3.8982e-17

See: https://www.mathworks.com/help/matlab/matlab_prog/anonymous-functions.html

[John D'Errico]

A good addendum is that IF you want this function to be vectorized, thus able to work for an entire vector or array of inputs elements, then use the ./ operator. Thus:

g = @(x) sin(x)./x;

(Without that dot in there, you will get strange results when you try to use this function on a vector.) But now we can use g on entire vectors.

g([1 2 3 4 5])

ans = 1×5

0.8415 0.4546 0.0470 -0.1892 -0.1918

The singularity at x==0 is unresolved of course, since 0/0 is undefined..

g(0)

ans = NaN

We can even plot it nicely without any arguments from MATLAB, thus

fplot(g,[-10*pi,10*pi])