random number between -1 and 1

Hi I need a 1 line code for a random number generator between 1 and -1 for one element.

Answer 1

[Wayne King]

Do you want these uniform between -1 and 1?

   r = -1 + 2.*rand(100,1);

For 1 such number

     r = -1+2*rand(1,1);

[Jan]

@Mate 2u: If you read the help text of RAND you find corresponding examples. Please take the time to read the help and doc.