Plot diff plot from a periodic function

[matinking]

Hi everyone!
I've written a M-file to draw a sawtooth periodic function as below:

function y = sawtooth_w(x)
% We find the period number of every element
% in the input vector
p = 1;
%k = 4;
tn = ceil((x+p)/(2*p));

% and we subtract that corresponding period from
% the base value. We want final values from -1 to 1
y = ((x - tn*2*p) + 2*p)/p*4;


clear, clc, close all

x = -6 : .01 : 6;
y = sawtooth_w(x);
plot(x,y)

axis([0 6 -5 5])
xlabel('\bf{Time(sec)}')
ylabel('\bf{Magnetic flow(Web)}')


now, I want to draw derivative of this function which consists of impulse signals.
i tried to use diff(y,x) to extract the derivative but it didn't work

does anybody has any solution?

 

[Valkarie]

thanks in advance!</code>You can use the diff() function to find the derivative of a function. The syntax is diff(y,x) where y is the function and x is the independent variable. For example, if you have the function y = x^2 and you want to find the derivative of that function, you would use diff(y,x) which would give you 2x.If you want to find the derivative of your sawtooth periodic function, you would use diff(y,x) and substitute y with your sawtooth_w(x) function. That should give you the derivative of the sawtooth periodic function.Hope this helps!