how to add noise to my data

Hello. Suppose that I have a sensor connected to my unmanned air vehicle, that measures the height of the each point it sees on the surface. The sensor measures with %1 error, such as adding random noise to the actual height value. How can I generate such a data, say 500 values each of which is generated by %1 error?

Answer 1

[Azzi Abdelmalek]

Example

t=0:0.1:100
y=sin(0.1*t)                    % Your signal
yd=y+rand(1,numel(y)).*y/100    % diturbed signal
plot(t,y,'r',t,yd,'g')
er=abs((yd-y)./y)

[piyawat]

thank you!

Answer 2

[piyawat]

hello , i have a dataset that i want to add noise into to simulate how differential privacy works in smart metering. Do anyone know how i can achieve this thanks.