R[1;-1] how i write the program in matlab for random selection between 1 and -1

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Malik Shah Zeb Ali
评论： Pawel Jastrzebski 2018-1-2
need help

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采纳的回答

Jan
Jan 2018-1-2
V = 1 - 2 * randi([0,1])
or
V = 1 - 2 * (rand >= 0.5)

更多回答（2 个）

Torsten
Torsten 2018-1-2
x = rand;
if x <= 0.5
number = 1;
else
number = -1;
end
Best wishes
Torsten.
Pawel Jastrzebski
clear all;
clc;
% use 'random function' of your choice
% - rand()
% - randi()
% - randn()
% GENERATES A RANDOM NUMBER IN A RANGE OF -1 TO 1:
r1 = -1+ 2*rand(1);
% GETS THE SIGN OF THE 'r1'
sVal = sign(r1);
% ALL ABOVE CAN BE DONE IN ONE LINE:
sVal1 = sign(-1+ 2*rand(1));

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