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Topic: Matrix variable with parametric elements
Replies: 10   Last Post: Dec 26, 2012 5:38 PM

 Messages: [ Previous | Next ]
 Nasser Abbasi Posts: 6,677 Registered: 2/7/05
Re: Matrix variable with parametric elements
Posted: Dec 26, 2012 7:32 AM

On 12/26/2012 6:26 AM, Nasser M. Abbasi wrote:
> On 12/26/2012 5:51 AM, Michael Doukas wrote:
>> Hello everybody,
>>
>> I am fairly new to Matlab so please, if you can, reply as plain as possible.
>>
>> I want to create a 40X9 matrix and store it as a variable, but the matrix elements must be "parametric", meaning that i want the elements of the:
>> first column to take random integer values in the range 0:2 (i.e. integers 0 or 1 or 2),
>> second column to take random integer values in the range 3:6 (i.e. 3 or 4 or 5 or 6),
>> ...
>> ninth column to take random integer values within the range 56:67 (i.e. 56 or 57...67)
>>
>> Please let me know in case you want me to further explain my problem.
>>
>> Thanks,
>> Mike
>>

>
> How did you get that columns 9 will have 56:67? I think it should be 52:62
>

Ok, please try this. Nothing fancy, just a loop (oh no!)

-------------------
nRow = 40;
nCol = 9;
from = 0; to = 2;
A = zeros(nRow,nCol);

for j = 1:nCol
A(:,j) = randi([from,to],nRow,1);
from = to+1;
to = from+j+2;
end
----------------

A =
0 5 11 17 20 32 33 48 52
2 6 8 17 20 32 35 47 54
0 5 11 15 21 26 40 43 52
1 5 11 15 21 27 33 51 54
1 6 9 12 20 32 40 47 53
2 3 11 17 20 29 33 46 54
1 4 11 14 21 29 39 51 53
1 3 9 13 22 29 37 48 53
2 3 10 17 24 31 34 46 58
1 5 9 16 23 29 38 50 61
1 5 7 17 20 26 34 47 62
2 6 9 13 23 28 39 47 54
0 5 10 16 18 28 38 48 57
2 3 9 15 18 32 33 45 56
0 6 8 12 18 29 33 44 57
2 6 11 14 19 30 34 47 54
1 4 11 13 20 30 33 50 52
2 5 11 16 20 27 36 46 56
1 6 8 13 18 29 40 43 53
1 5 9 17 21 29 38 46 52
2 6 11 16 18 26 37 45 62
0 4 11 14 19 29 40 46 56
0 4 10 14 22 30 33 50 62
2 5 8 16 24 28 41 46 60
1 4 10 17 24 31 33 45 52
0 5 7 15 21 30 37 45 59
1 5 9 15 24 27 34 43 59
0 5 10 13 21 28 38 44 59
0 4 11 14 21 28 33 42 58
0 3 11 16 20 31 39 46 54
0 4 9 17 21 30 40 44 60
0 4 10 16 21 28 41 44 54
1 6 9 12 18 30 41 46 56
0 6 11 16 24 32 37 43 61
2 5 11 14 18 31 35 46 61
0 3 11 14 21 30 33 49 56
2 3 8 12 23 25 37 44 55
1 5 9 16 20 28 38 49 58
0 4 8 13 22 29 39 42 62
1 6 10 13 23 28 33 45 62

--Nasser

Date Subject Author
12/26/12 Michael Doukas
12/26/12 Nasser Abbasi
12/26/12 Nasser Abbasi
12/26/12 Michael Doukas
12/26/12 Nasser Abbasi
12/26/12 Michael Doukas
12/26/12 Roger Stafford
12/26/12 Michael Doukas
12/26/12 Nasser Abbasi
12/26/12 Roger Stafford
12/26/12 Nasser Abbasi