For loop stops after one step

Why does the below for loop stops after one step? L is a up to 1000. So I am expecting to get a matrix with 1000 rows. Thanks in advance for any suggestions.

for i=1:L

X= ((data_P_H2O(1,3).*data_P_NaF(i+1,3))-(data_P_NaF(1,3).*data_P_H2O(i+1,3)))*0.5 ;

Y = ((data_P_H2O(1,4).*data_P_NaF(i+1,4))-(data_P_NaF(1,4).*data_P_H2O(i+1,4)))*0.5 ;

Z = ((data_P_H2O(1,5).*data_P_NaF(i+1,5))-(data_P_NaF(1,5).*data_P_H2O(i+1,5)))*0.5 ;

PhiIW= X + Y + Z;

end

Answer 1

[Steven Lord]

What makes you believe the loop stops after one step? Were you expecting PhilW to contain the sum of X, Y, and Z for each element of i? As written at each iteration you're overwriting the previous value of PhilW with the new value.

Compare:

for k = 1:10
    x = k.^2; % Overwrite
    y(k) = k.^2; % Append
end
x

x = 100

y

y = 1×10

1 4 9 16 25 36 49 64 81 100

[Avik Mahata]

Well y(k) worked. I didn't realized I am not indexing each of the rows for it save the results in a matrix. Thanks for taking time to respond.