Looping through Structure Elements

I have this code, where I am trying to loop through structure elements.

month2=struct('January',1,'February',2,'March',3,'April',4,'May',5,'June',6,'July',7,'August',8,'September',9,'October',10,'November',11,'December',12);
year2 = struct('Twelve',1,'Thirteen',2);
fieldmonths = fieldnames(month2);
fieldyear = fieldnames(year2);
for i = 1:numel(fieldyear)
  for j = 1:numel(fieldmonths)
 temp1 = Electrical.(fieldyear{i}).(fieldmonths{j})(1,1);
end
end

Anyone know why this is telling me that Electrical.Twelve.February doesnt exist?

Answer 1

[Leah]

Because you are referencing Electrical.Twelve.February before it's created.

I'm not sure what your code is trying to do, but try replacing the temp1 line inside the loop with this:

Electrical.(fieldyear{i}).(fieldmonths{j})=[];

This will build an empty structure.

[Franco]

I guess I should have added that Im crating the structure before..Ooops!

for i = 1:a3

    if date_4(i,1) == 1 && date_4(i,3) == 12;

        Electrical.Twelve.January(i,:) = electrical_data(i,:);

    elseif date_4(i,1) == 2 && date_4(i,3) == 12;

        Electrical.Twelve.February(i,:) = electrical_data(i,:);

    else

continue

end

end

[Jan]

@Franco: But the error message tells you unequivocally, that Electrical.Twelve.February does not exist. Perhaps the is no "date_4(i,3) == 12". While you can check this using the debugger, we can only guess these details.