How to generate a random decimal number between -1 and 1?

I'm trying to use rand below but it is giving me [ ].

rand([-1 1]);

[Ameer Hamza]

The answer here: https://www.mathworks.com/matlabcentral/answers/630328-how-to-generate-a-random-decimal-number-between-1-0-and-1-52 will also work for this question. Just use

range = [-1 1]

Answer 1

[Stephen23]

The inputs to rand define its output size, not the output value range. Its range is fixed to 0..1, but you can adjust generate other values using some simple operations:

2*rand()-1

ans = -0.7192

Answer 2

[Walter Roberson]

 rand*2-1

Note this will not generate exactly -1 or exactly 1