Please help extract values from a struct

Hi all, I created a struct using a for loop and need to extract values from it. So for instance, for field T with value = 728, it would produce the first row as shown in the photo.

Thanks

code

for CPR = 10:10:50

for BPR = 4:1:9

for FPR = 0.5:0.1:2

for TO4 = 500:200:1300

for m = 80:20:400

[ST,TSFC,T,] = turbofan(CPR,BPR,FPR,TO4,m)

Data(count).CPR = CPR;

Data(count).BPR = BPR;

Data(count).FPR = FPR;

Data(count).TO4 = TO4;

Data(count).ST = ST;

Data(count).TSFC = TSFC;

count = count+1;

end

end

end

end

end

[Turlough Hughes]

The first row as shown in the photo

So you want to find the index in field T where the value is close to 728 and then return values from all other fields corresponding to that index?

[Joel Ogualiri]

correct and then store them in a new struct with all the corresponding fields

Answer 1

[Ameer Hamza]

You can read about details of struct array here: https://www.mathworks.com/help/matlab/matlab_prog/create-a-structure-array.html. To access the field T in the first row, you can access it like this

Data(1).T

Edit:

To extract the rows close to 728, you can use something like this

value = 728;
tolerance = 0.005; % tolerance of value around 728
idx = abs([s.T] - value) < tolerance;

new_Data = Data(idx);

[Joel Ogualiri]

Thanks but what I want is to have the struct save for only values of T = 728 in the for loop

[Ameer Hamza]

But the exact value of 728 does not exist. How much difference is allowed?

[Joel Ogualiri]

Maybe say values greater than 728 but less than 728.005. (I will increase the dataset later on thatll have values in this range.)

[Ameer Hamza]

Please check my updated answer.

[Joel Ogualiri]

thanks a lot

[Ameer Hamza]

I am glad to be of help.