fundamental principle of multiplication
2 visualizzazioni (ultimi 30 giorni)
Mostra commenti meno recenti
i have 4 numbers as a row vector, p=[ 1 -1 j -j ];
Now, total number of different 4 digit numbers formed using elements of "p" is 4^4=256
Thus i need a 256*4 matrix.
How to create such a 256*4 matrix ?
2 Commenti
Image Analyst
il 12 Ott 2013
What is a 4 digit number? Can you give an example of the first 6 rows of what you want at the result?
Risposta accettata
Più risposte (2)
Sean de Wolski
il 11 Ott 2013
[xx,yy,zz,qq] = ndgrid('1234');
V = [xx(:) yy(:) xx(:) qq(:)]
Cedric
il 12 Ott 2013
Modificato: Cedric
il 12 Ott 2013
I guess that the following would work. I didn't think too much about it though and there must be a simpler or even trivial solution..
>> ID = mod(floor((0:255).' * 2.^[0:-2:-6]), 4) + 1 ;
>> p(ID)
Check
>> size(unique(ID, 'rows'))
ans =
256 4
2 Commenti
Cedric
il 12 Ott 2013
Modificato: Cedric
il 12 Ott 2013
Just in case nobody proposes a better solution, the way this one works is comparable to the way you build tables of binary codes.. you build the first column as 01010101.., the second as 0011001100.., the third as 000011110000.., and so on. My solution does the same in base 4.
Vedere anche
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!