Solving a Matlab Radiation Measurement Loop Over a Year

[ShaunaLB]

I have a code in Matlab where I need to measure the radiation on a specific latitude over a year. I have my time steps in hours and I am iterating over a year. I have parameters for the amount of radiation per hour in a 24 hour period, but my problem is that I want to loop this 24 iteration loop 365 times. Any suggestions??
Thanks in advance

 

[Topher925]

Yes, just use a nested loop. For example;

for d = 1:365
   for h = 1:24
      blahh...
   end
end

 

[ShaunaLB]

thanks,
I also have a reocurring problem with my index being out of bounds. here is my code
clear
clf
n=8760;
dt=1/24;
Vp=2.9;
alpha=0.025;

for i=1:n
for j=1:24
if j>=1 && j<5;
I(j)=1;
end
if j>=5 && j<7;
I(j)=978 +1;
end
if j>=7 && j<17;
I(j)=1955.7;
end
if j>=17 && j<19;
I(j)=-978 + 1955.7;
end
if j>=19 && j<=24
I(j)=1;
end
end
F(i)=5*I(i);

end
plot (F)

and I keep getting the error:
? Attempted to access I(25); index out of bounds because
numel(I)=24.

Error in ==> Itest2 at 26
F(i)=5*I(i);

if the issue of index out of bounds could also be explained that would be greatly helpful

 

[Topher925]

The problem is that you are trying to access a dimension of the array I that doesn't exist. You can't call the value form I(25) because it only goes to 24.

Also, you need to structure your code better. Matlab isn't fortran or the original C. For loops should never contain "and" statements. If you want to loop from value 19 to 24 for example, then go like this;

for j = 19:24
   do stuff...
end

%or for steps of 2

for j = 18:2:24
   do stuff
end

I recommend reading some MATLAB basic tutorials to help get you up to speed with programming.

 

[blue_raver22]

I understand the importance of accurately measuring radiation over a long period of time. It seems like you have a good start with your code and parameters for the radiation per hour. To solve your problem of looping the 24-hour iteration 365 times, I would suggest using a for loop that iterates over the 365 days in the year. Within this loop, you can include your 24-hour iteration loop and have it run for each day. This will ensure that your code measures the radiation for each day over the entire year. Additionally, you may want to consider storing your radiation measurements in an array or matrix for easier analysis and visualization. I hope this suggestion helps you in solving your Matlab radiation measurement loop over a year. Best of luck!