Matlab - Comparar Matriz con un valor determinado

clear all

clc

P1=rand(1,10)

r=0.25

P2=rand(1,10)

V=P2<r

P3=P1(V)

>> preguntas

P1 =

    0.5099    0.4600    0.3111    0.6644    0.2925    0.3637    0.9198    0.5776    0.0877    0.8867

r =

    0.2500

P2 =

    0.9955    0.1814    0.8212    0.5461    0.6773    0.6135    0.5156    0.2418    0.8335    0.0308

V =

     0     1     0     0     0     0     0     1     0     1

P3 =

    0.4600    0.5776    0.8867

clear all

P1=rand(1,10)

r=0.25

P2=rand(1,10)

V=P2<r

P3=P1(V)

if rem(length(P3),2)~=0

    v=randi([1 10],1);

    P3=[P3, P1(v)];

end

P3

> preguntas

P1 =

    0.5566    0.4065    0.7625    0.4024    0.7266    0.6155    0.4350    0.0587    0.7931    0.7901

r =

    0.2500

P2 =

    0.0930    0.0882    0.5015    0.7942    0.2124    0.2464    0.5547    0.8416    0.1751    0.2795

V =

     1     1     0     0     1     1     0     0     1     0

P3 =

    0.5566    0.4065    0.7266    0.6155    0.7931

P3 =

    0.5566    0.4065    0.7266    0.6155    0.7931    0.5566