I keep getting not enough input arguments error when trying to make a sine function

function [x,t] = sin_NU(fs,f0,T)
t = 0:1/fs:T; %time vector
x = sin(2*pi*f0*t); %signal vector
end

I am trying to make a sine function and sample the sine signal with a certain sampling frequency. Please help, I would really appreciate it!

[Dyuman Joshi]

How are you calling your function? Show the error as well.

Use .* if f0 is not a scalar

[kiroro00]

Error in sin_NU (line 2)
t = 0:1/fs:T; %time vector

this is the error

[x,t] = sin_NU(1000,10,0.5);
figure(1);
plot(t,x);
xlabel ('Time');
ylabel ('Signal');
title ('sin NU function test');

and this is how I call the function

I am still kind of confused because when I try to run the sin_NU code with values in it, there is a continuous sine signal but not with the sampling frequency (because I think I should get a discrete signal when I run the code, right?) I am not sure if I am doing it right.

[Jamal Badiee]

I ran your code by just copy pasting and got no error.

[kiroro00]

I see, thank you! I guess I was too confused. Gotta check on my understanding and also try running the code again ~

[Dyuman Joshi]

Works fine, @kiroro00

[x,t] = sin_NU(1000,10,0.5);

figure(1);
plot(t,x);
xlabel ('Time');
ylabel ('Signal');
title ('sin NU function test');

function [x,t] = sin_NU(fs,f0,T)
t = 0:1/fs:T; %time vector
x = sin(2*pi*f0*t); %signal vector
end

Answer 1

[Voss]

It's possible that you inadvertently clicked the run button or hit the F5 key in the MATLAB editor window where sin_NU.m was open, which ran the function sin_NU with no input arguments. When that happens, you get the error "Not enough input arguments" on the first line where an input argument is used.

When you run sin_NU with input arguments, as in:

[x,t] = sin_NU(1000,10,0.5);

no error happens because the input arguments are given.

And if you want to see a discrete signal, you may consider using stem instead of plot:

[x,t] = sin_NU(1000,10,0.5);
figure(1);
stem(t,x);
xlim([0 0.06]); % zoom in to show the stems
xlabel ('Time');
ylabel ('Signal');
title ('sin NU function test');

[kiroro00]

Thank you! Really sorry for the late reply. I've seen and noted your answer but forgot to respond. Thanks again and have a great day.

[Voss]

You're welcome!