How to insert vector into a Matrix?

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Andrea Brocchi
Andrea Brocchi 2019-7-15
评论： Alex Mcaulley 2019-7-16
Hi, I do a while cycle, into this while i have a method to create a vector with random number (using randi). At the end of this while cycle i have a vector with all the casual number. This while cycle is in turn within another while cycle which is repeated 4 times, but every 4 times in my matrix i have the same values. I show for you my code:
For example: if in 1 cycle i have generate this vector: [1 2 3 4], this same numbers appair also in the other raw of matrix final.
nSim=1
while nSim<5
while t<nmax
Number=randi([0 9],1,1);
Vector(t)=Number;
t=t+1
end
addVector=[Vector];
MatrixFinal( end+1, :) = addVector;
nSim=nSim+1;
end
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Alex Mcaulley
Alex Mcaulley 2019-7-15
Do you know that you can do it in just one line?:
MatrixFinal = randi([0,9],4,nmax-1)
Andrea Brocchi
Andrea Brocchi 2019-7-15
Yes, but i have to do a lot of calculations with the numbers generated (i don't report here the code with the calculations).

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回答（1 个）

Alex Mcaulley
Alex Mcaulley 2019-7-15
Well, If you want to follow your current code, to obtain what you want yo just need to initialize t before the while:
nSim=1
while nSim<5
t = 1; %This line
while t<nmax
Number=randi([0 9],1,1);
Vector(t)=Number;
t=t+1
end
addVector=[Vector];
MatrixFinal( end+1, :) = addVector;
nSim=nSim+1;
end
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Andrea Brocchi
Andrea Brocchi 2019-7-15
I insert before the first while; if I insert in the position that you say give me this error:
Unable to perform assignment because the size of the left side is 1-by-4319 and
the size of the right side is 1-by-8638.
Alex Mcaulley
Alex Mcaulley 2019-7-16
Upload the full code you are using, it is difficult for us to guess without more information. Putting the initialization of t before the first while dosen't give you the desired results because the loop on t is not executed after the first iteration of the first while loop, then the repeated sequence.

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