MATLAB: Increassing an array by a random value

arrayMATLABMATLAB and Simulink Student Suiterandomrandom number

Hello guys,
lets say I have 3 arrays and 3 random numbers that I use to increase elements in the 3 arrays. Something like this:
a = rand()*(2)-1;
b = rand()*(2)-1;
c = rand()*(2)-1;
X = [1...10];
Y = [11...20];
Z = [21...30];
Now the easiest way to increase the elements in arrays by those number would be:
X1 = X+a
Y1 = Y+b
Z1 = Z+c
My question is if there is a way to add those random numbers randomly, so it will alway choose a random number from a,b,c to every array

Best Answer

a = rand()*(2)-1;
b = rand()*(2)-1;
c = rand()*(2)-1;
abc = [a,b,c]
abc = 1×3
   -0.2610    0.8958    0.0643

X = [1:10];
Y = [11:20];
Z = [21:30];
XYZ = [X;Y;Z];
ridx = randi(3, size(XYZ))
ridx = 3×10
     3     3     3     3     2     1     2     3     1     1
     1     3     2     3     1     3     1     3     2     2
     3     3     2     3     2     1     1     2     1     3

XYZ = XYZ + abc(ridx);
X1 = XYZ(1,:)
X1 = 1×10
    1.0643    2.0643    3.0643    4.0643    5.8958    5.7390    7.8958    8.0643    8.7390    9.7390

Y1 = XYZ(2,:)
Y1 = 1×10
   10.7390   12.0643   13.8958   14.0643   14.7390   16.0643   16.7390   18.0643   19.8958   20.8958

Z1 = XYZ(3,:)
Z1 = 1×10
   21.0643   22.0643   23.8958   24.0643   25.8958   25.7390   26.7390   28.8958   28.7390   30.0643
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