WHich loops or command should i use in order to plot this equation? It has 3 variables: v,x,t

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Parth Patel 2020-4-15

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评论： Mehmed Saad 2020-4-16

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Answer 1

Mehmed Saad 2020-4-15

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编辑：Mehmed Saad 2020-4-15

define x,t of same length i.e. select a sampling rate

fs = 10;%Hz

Now define time

t = 0:1/fs:100-1/fs;
x = linspace(0,2*pi,length(t));
i_t = 1.414*sin(w*t+phi);

Now Run the for loop for t

i = 1:length(x)

Now index 1 by 1 and sum them

Remember there are two nested for loop, 1 is for v and other for t

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Parth Patel 2020-4-16

编辑：Parth Patel 2020-4-16

Hi Saad, thankyou very much for the explaination.

My doubt is , dont we need another loop for x as well?

So total 3 - loops:

for x
for t
.for v (harmonics)?

Also in which order should i organise x, t,v in for loop?

Here is the code ,that i tried:

fs = 10;%Hz, sampling frequency
f=60 ; %Hz, supply frequency of current
w=2*pi*f;
t = 0:1/fs:100-1/fs;
x = linspace(0,2*pi,length(t)); % samples of the postion of rotor in radians
phi=0;
i_t = 1.414*sin(w*t+phi);
v=1:2:5;        % order of harmoinics to be considered
b=1:length(v);  % indexing the elements in v
res= [];        % result matrix as an empty matrix
for i =1:length(x)
    for  b= 1:length(v)
        res(b,i)= i_t(i)*cos(v(b)*x); % result variable
    end
end

Mehmed Saad 2020-4-16

yes you need another loop for x
you can nest for loop as x t and v or t x and v
You should follow nyquist rate as your frequency is 60Hz so you need atleast 120Hz fs
x size can differ from t, it is not necessary