MATLAB: How to create a random 10×10 matrix with values between -10 and 10

matrices

Z=rand(10,10) give me a random 10×10 matrix but between 0 and 1. How would I change this to be between -10 and 10?

Best Answer

a = -10;
b = 10;
Z = (b-a).*rand(10) + a;
command window:
>> Z
Z =
  Columns 1 through 7
   -7.8888   -7.3805   -5.7111   -8.3337    2.7580    4.6775    4.6755
    1.8766    6.6746    0.3986    0.2221   -9.6776   -3.3602   -1.2566
   -4.3454    6.0094    9.7837   -2.6633    7.9191    6.7950   -2.4032
   -6.8956    8.3576   -0.2017    4.7896    0.3075   -2.5655    9.5931
   -9.9868   -7.2539    3.8975    0.4948    0.8904    6.5643   -2.0201
   -4.3281    0.0946   -1.7716    6.0904    2.1288   -6.4696   -1.1963
    1.0162   -1.9008   -9.3045    6.3382    5.2087   -7.4096   -6.8638
    7.4180   -6.5286   -4.1434   -6.2106    7.1069    7.5977   -3.4793
   -9.1549    1.5037    6.0288   -7.5261   -2.3426   -9.1184   -3.7188
    8.0944    2.1244   -3.0700    6.4199   -8.3070    3.7344    7.8900
  Columns 8 through 10
   -5.0595    4.0009   -4.8808
   -3.7864   -5.7098    8.5834
   -1.8226    3.5981   -0.6649
    4.1602    1.1459   -4.9198
   -7.1272    7.0136   -1.3756
    7.4264    1.1713    4.0506
   -8.3369    8.0355   -1.9534
   -0.7652   -1.6096   -6.3632
   -9.3922   -2.8374    7.1250
    5.0640   -0.2202    1.6840
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