MATLAB: How to modify vector

MATLAB

I wanted to modify this vector y= 3*x -1 by randomly adding or subtracting 0.5 to every element in the in it. Using rand and while loop.

Best Answer

What vector? Is x a vector? Why do you possibly need a while loop?

y = y + round(rand(size(y))) - 0.5;

So round(rand(size(y))) is randomly 0 or 1, with 50% chance for either. Subtract 1/2, and you will effectively randomly add or subtract .5.

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MATLAB: How to insert rand noise for this

You can use rand() to produce a vector (or matrix/array) of random values between 0:1. I subtracted 0.5 from those random numbers to center them around 0. Then I scaled them by a factor of 2 to demonstrate how to scale the random noise. Then simply add the noise to your data.

xrand = (rand(size(x))-0.5) * 2; 
yrand = (rand(size(Y))-0.5) * 2; 
plot (x + xrand, Y + yrand, 'linewidth', 2)

By the way, you defined N twice in your code.

MATLAB: How to make random vector

Hi,

use

x = (2*rand(1,100)-1)/10;

Best regards

Stephan

Best Answer

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