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Kobi
0

using diff or gradient function normalized the vector

Asked by Kobi
on 3 Apr 2015
Latest activity Answered by Jos
on 4 Apr 2015
for some reason when i use gradient function over a vector the scale get lowerd for example of sin function: the maximum is divided by 10 and in other cases the maximum is divided by something else

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1 Answer

Answer by Jos
on 4 Apr 2015

you have to divide by the time step. For instance, this gives you what you want
dt=0.1;
t=-2*pi:dt:2*pi;
subplot(3,1,1)
plot(t,sin(t))
subplot(3,1,2)
plot(t,gradient(sin(t),dt))
subplot(3,1,3)
plot(t(1:end-1),diff(sin(t))/dt)

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