generate random number between positive and negative and sum of this number is zero

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kukuh widarsono
kukuh widarsono 2022-4-12
评论： Voss 2022-4-12
I want generate random number between positive and negative, and then the sum of this number equal to zero. what have I should do?

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采纳的回答

Bruno Luong
Bruno Luong 2022-4-12

更多回答（1 个）

Voss
Voss 2022-4-12
Ran in:
x = randn(); % random number from standard Normal distribution
y = -x; % another number such that the sum of x and y is 0
x
x = -0.4716
y
y = 0.4716
x+y
ans = 0
  2 个评论
Voss
Voss 2022-4-12
Ran in:
x = randn(5); % 5x5 random matrix from standard Normal distribution
y = -x; % another matrix such that the sum of x and y is 0
x
x = 5×5
-1.3777 -0.9362 -1.0312 -2.0870 0.9580 0.1070 1.1208 -0.8803 -0.0622 0.7201 1.1074 0.3074 0.7390 -0.3496 0.2003 -1.2134 0.5940 -0.3744 0.3251 0.3406 0.5072 0.3389 -1.6013 1.9403 0.2310
y
y = 5×5
1.3777 0.9362 1.0312 2.0870 -0.9580 -0.1070 -1.1208 0.8803 0.0622 -0.7201 -1.1074 -0.3074 -0.7390 0.3496 -0.2003 1.2134 -0.5940 0.3744 -0.3251 -0.3406 -0.5072 -0.3389 1.6013 -1.9403 -0.2310
x+y
ans = 5×5
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

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