making new code by calling 3 different RANDOM variables

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milad babaei
milad babaei 2011-6-27
[EDIT: 20110627 13:09 CDT - reformat - WDR]
This function will generate a normal distribution conditional by bounds:
http://www.mathworks.com/matlabcentral/fileexchange/23832-truncated-gaussian
i have used above code 3 times and made 3 random variables c, fi, G. now i want to calculate qult.
this is my code :for getting distribution of qult i need to produce 3 different random variables (c, fi, G) by above code and call them in a new code to get answer. how should i use c, fi, G that i produced and call them in a loop to compute qult.
this is my code for qult:
B=1000;L=2000;Sc=1.1;Sq=1.1;Sgama=.8;
nsamples=10000;
for i=1:nsamples
C=C(1,i);
G=G(1,i);
fi=fi(1,i);
Nq=tan((pi/4)+(pi*fi/360))*tan((pi/4)+(pi*fi/360))*2.718^(pi*tan(fi*pi/180));
Nc=(Nq-1)*cot(fi*pi/180);
Ngama=2*(Nq+1)*tan(fi*pi/180);
qult(i)=(C*Nc*Sc)+(384*Nq*Sq)+(980*Ngama*Sgama);
end
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milad babaei
milad babaei 2011-6-28
after running and generating values for C,fi and G.then run qult code, this error first shows up :
??? Attempted to access C(1,2); index out of bounds because numel(C)=1.
Error in ==> tbc at 4
C=C(1,i);
would u plz explain me mre to what should i do for correcting indexes ??
Krishna Kumar
Krishna Kumar 2011-6-28
Refer to my earlier comment here. if a matrix X is 5x5, and you do sth like this
X=X(3,1);
Now X is a scalar. The next time if you run
X(4,1), error is generated, since X is 1x1.
You need to use separate variables for the matrix of random numbers and the particular random num taken in loop.

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Walter Roberson
Walter Roberson 2011-6-28
On the first iteration through the loop, your statements
C=C(1,i);
G=G(1,i);
fi=fi(1,i);
are equivalent to
C=C(1,1);
G=G(1,1);
fi=fi(1,1);
That is, you take a single value out of the array C and you replace the entire array C with that single value; likewise for G and fi. So after the first iteration, C and G and fi each only have one element left.
What you should do is rename your C, G, and fi variables so that you are not storing over your C, G, and fi arrays.

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