placing specific number randomly in array in matlab

Question

how to do this?

i want to place a specific number, like number 2 randomly into a 3x3 of zeros array, it did came out, but the coding still not right and somehow number 1 also appear.

rows = 3;
cols = 3;

M = zeros(rows,cols);

p = randi(2);

rV = randperm(rows);
cV = randperm(cols);


M(rV(2),cV(2))=p

where did i do wrong? any suggestion

M(randi(numel(M)))=2 ?

bla
– bla

2016-04-13 04:40:03 +00:00
Commented Apr 13, 2016 at 4:40 — bla
– bla, Commented Apr 13, 2016 at 4:40
thanx! that works too..

user6196619
– user6196619

2016-04-13 04:54:07 +00:00
Commented Apr 13, 2016 at 4:54 — user6196619
– user6196619, Commented Apr 13, 2016 at 4:54

Edric · Accepted Answer · 2016-04-13 07:55:12Z

1

You could also use randi together with linear indexing

m = zeros(3);
m(randi(numel(m))) = 2;

answered Apr 13, 2016 at 7:55

Edric

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Comments

Ɖiamond ǤeezeƦ · Accepted Answer · 2016-04-13 13:53:42Z

0

No need - I've already solved it!

a=[2];
m=zeros(3);
m(randperm(numel(m),numel(a)))=a

edited Apr 13, 2016 at 13:53

Ɖiamond ǤeezeƦ

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answered Apr 13, 2016 at 4:53

user6196619

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