Problem in executing a for loop
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I'm trying to filter data for Quadrant hole analysis. My intention is to calculate total sum (S_Q1_H) for each H-value which I'm trying to implement via a for loop initiated at the beginning as for H=1:4 Even though the code is being executed, the output shows that all the 4 values of total sum S_Q1_H are same
No matter how many times I check, I'm unable to find where the logic error is... Here is the code.
for H=1:4
temp=0;
for n = 1:1000000
sprintf('%f',H);
if and(u_real(n)>0,v_real(n)>0)
if n == temp + 1
u_Q1(n) = u_real(n);
v_Q1(n) = v_real(n);
if ((u_Q1(n)*v_Q1(n))> (H*s_U*s_V))
u_Q1_H(n)= u_Q1(n);
v_Q1_H(n)= v_Q1(n);
end
temp = n;
elseif n~= temp+1
d = n-temp;
u_Q1(n) = u_real(n);
v_Q1(n) = v_real(n);
if ((u_Q1(n)*v_Q1(n))> (H*s_U*s_V))
u_Q1_H(n)= u_Q1(n);
v_Q1_H(n)= v_Q1(n);
end
temp = n-d+1;
end
end
end
u_Q1_H_s = u_Q1_H(u_Q1_H~=0);
v_Q1_H_s = v_Q1_H(v_Q1_H~=0);
[f,s1]=size(u_Q1_H_s);
temp=0;
for o=1:s1
S_Q1_H(H) = temp + u_Q1_H_s(o)*v_Q1_H_s(o);
temp = S_Q1_H(H);
S_avg_Q1(H) = temp/o;
end
end
Réponses (2)
Walter Roberson
le 16 Sep 2015
Inside your "for n" loop you have
if n == temp + 1
but you have not initialized temp in the given code before you use it here.
If you do happen to have an initialized temp before starting the loop, then note that the next H along, the temp value will be temp = S_Q1_H(H); from the "for o" loop. It seems unlike that is what you want.
Guillaume
le 16 Sep 2015
Modifié(e) : Guillaume
le 16 Sep 2015
The best way for you to understand why your program is not giving you the correct result is to use the debugger. Place a breakpoint on the first line of code, step through each line and observe the result of each operation as it is executed. You'll quickly see if your loop is executed and if not, why not.
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