How can I represent the following equation in code?

How can I represent the following equation in code?

I tried this

abs((e.^(j*w)).*H)

but the parenthesis disappear.

I need to write in code to be able to change the value of the variables. thanks for your help

[Walter Roberson]

In this context, H might be the Hankel function, https://www.mathworks.com/help/matlab/ref/besselh.html

Answer 1

[R SRIRANJANI RAMAKRISHNAN]

h(e^jw) is a. function. After substituting the values, it is assigned to a variable. That variable can be compared with this value.

Answer 2

[Walter Roberson]

w = linspace(-5,5);

hejw = abs(besselh(1, exp(1j*w)));
mask = 0.7943 <= hejw & hejw <= 0.8913;

plot(w, hejw, 'k-');
hold on
scatter(w(mask), hejw(mask), 'b*');
hold off