Multiple output values on an if else loop

I need to run the following code 10 times (as the number of Hact array) and for each Ht value take a WeightF value. Then plot these 10 values of WeightF. The problem is that it returns ten times the same value. Can anyone help??

%insert exeprimental data in xlsx file

data = xlsread('demo.xlsx');

data(1:9,:)

Hsunrise = 6.5;

Hsunset = 17.7;

for i=1:9

Ht = (12/(Hsunset - Hsunrise)).*(Hact-Hsunrise);

if Ht < -4

WeightF = 0.11;

elseif -4 < Ht < -3

WeightF = 0.11;

elseif -3 < Ht < -2

WeightF = 0.07;

elseif -2 < Ht < -1

WeightF = 0.08;

elseif -1 < Ht < 0

WeightF = 0.06;

elseif 0 < Ht < 1

WeightF = 0.05;

elseif 1 < Ht < 2

WeightF = 0.1;

elseif 2 < Ht < 3

WeightF = 0.51;

elseif 3 < Ht < 4

WeightF = 0.75;

elseif 4 < Ht < 5

WeightF = 0.95;

elseif 5 < Ht < 6

WeightF = 1;

elseif 6 < Ht < 7

WeightF = 0.9;

elseif 7 < Ht < 8

WeightF = 0.8;

elseif 8 < Ht < 9

WeightF = 0.59;

elseif 9 < Ht < 10

WeightF = 0.32;

elseif 10 < Ht < 11

WeightF = 0.22;

elseif 11 < Ht < 12

WeightF = 0.1;

elseif 12 < Ht < 13

WeightF = 0.08;

else

WeightF = 0.13;

end

disp(WeightF)

end

Answer 1

[Stephan]

in every run of your loop you overwrite WeightF. Use indexing to avoid this:

WeightF(i) = ...

also using i for loop count is not recommended, because of the imaginary number operator i in Matlab - use ii instead.

[Stephan]

what do you expect? You do the same calculation with the same values 9 times. It is obviously that you get the same result 9 times...

There is no connection from your data to the loop. I suspect that this is problem no. 2

[ANTONIOS LIONIS]

I expect for each value of Ht, to take a value for WeightF accordingly.

[Stephan]

Make sure to change the values of Hc inside the loop for every run accordingly to your data.

Answer 2

[ANTONIOS LIONIS]

Nope, only thing changed in now I have a 1X9 array output for WeightF with the same value!