How Define Delta Function

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Kutlu Yigitturk 2021-3-24

评论： Kutlu Yigitturk 2021-3-24

I have a problem about calculating with Delta Function. I am trying write matlab code for these function.

I wrote the following code for this function.

n = -5:1:7;
x = delta(n+1) - delta(n) + unit(n+1) - unit(n-2);
stem(n,x,'fill');
axis([-6 8 -1.5 1.5])
xlabel('n')
ylabel('x[n]')
grid

But I am getting the following error.

I don't now how can ı write the delta function in this way ,

function y = unit(x);
y = zeros(size(x));
y(x>0) = 1;
end

Can you help me write the delta function as the 'unit' function you see above? Thank you for your helping.

Star Strider 2021-3-24

If you have the Symbolic Math Toolbox, use the dirac function. It can be used with non-symbolic arguments as well.

Walter Roberson 2021-3-24

That is not a true Dirac δ function.

delta = @(x) x==0;

unit = @(x) x>=0;

n = -5:1:7;

x = delta(n+1) - delta(n) + unit(n+1) - unit(n-2);

stem(n,x,'fill');

axis([-6 8 -1.5 2])

xlabel('n')

ylabel('x[n]')

grid

Kutlu Yigitturk 2021-3-24

Thank you for your help Mr. Roberson. I got the result I wanted.

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