Could anyone help me how to solve the following issue.
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I am using the command line
randi([1,5], 1, 10)
to generate numbers with respect to single row versus 10 columns.
when i run the command sometimes it generates all 5 numbers with respect to single row versus 10 columns in the following manner
3 1 2 1 1 4 4 5 2 5
sometimes it doesnt and i am getting the result as follows:
4 1 5 5 5 1 1 2 2 4(number 3 is missing)
But for me i want to have all 5 number every time when the command executes.Could anyone please help me on this.
2 Commenti
Rik
il 28 Mag 2019
Come on Jaah, you must have tried something already. This is not your first question. Show your attempt.
Risposta accettata
Rik
il 28 Mag 2019
I can't think of a better solution, but you could try brute-forcing it with a while loop:
maxval=5;cols=10;
if maxval>cols
error('impossible combination')
end
result=randi(maxval,1,cols);
val_list=1:maxval;
while ~all(ismember(val_list,result))
result=randi(maxval,1,cols);
end
Più risposte (2)
Renato SL
il 28 Mag 2019
From
help randi
you will get the following:
R = randi([IMIN,IMAX],...) returns an array containing integer
values drawn from the discrete uniform distribution on IMIN:IMAX.
Since the numbers are drawn with uniform distributions, I don't think randi is what you should use. One clue is given in later lines:
The arrays returned by randi may contain repeated integer values. This
is sometimes referred to as sampling with replacement. To get unique
integer values, sometimes referred to as sampling without replacement,
use RANDPERM.
Perhaps try using randperm instead to have all 5 numbers everytime the command executes, as you expect.
PS.
Maybe this is not the most efficient answer, but try using this line:
[randperm(5,1) randperm(5,2) randperm(5,3) randperm(5,4)]
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