How can I write this exponential function in matlab

f(t)=0.2e^(-j(8πt-90°))+0.585e^(-j(7πt-78.69°))

Answer 1

[Ameer Hamza]

One way to write this is to create an anonymous function

f = @(t) 0.2*exp(-1i*(8*pi*t-pi/2))+0.585*exp(-1i*(7*pi*t-deg2rad(78.69)));

and then run it like this

>> f(0)
ans =
   0.1147 + 0.7736i
>> f(1)
ans =
  -0.1147 - 0.3736i
>> f(2)
ans =
   0.1147 + 0.7736i
>> f(pi)
ans =
   0.0177 + 0.3937i

Read here about anonymous function: https://www.mathworks.com/help/matlab/matlab_prog/anonymous-functions.html

Alternatively, create a function file named myFun.m (or whatever you want. The name of file and function must be same) and define a function like this

function y = myFun(t)
    y = 0.2*exp(-1i*(8*pi*t-pi/2))+0.585*exp(-1i*(7*pi*t-deg2rad(78.69)));
end

and then you can call it like this myFun(0), myFun(pi), etc.

Answer 2

[Hamed]

how i "exp(u(1))" and (u(1^3)) function setting! thanks

[Walter Roberson]

u(1^3) does not make any sense?

exp(u(1))

exp(u(1)^3)

exp(u(1))^3