Creating a row vector of values from for loop

Im trying to create a 1x196 row vector to correspond to displacement values calculated within a for loop. I keep getting the same 10 values rather than all 196.

Code:

file = imread("C:\Users\jrtow\OneDrive\Documents\MATLAB\EN2106_Coursework_Datasets_updated\Dataset2\150617_100kA_C001H001S0001000040.tif");
B1 = 33 ; %Maximum brightness pixel located at (33,112)
A = zeros(1,196); %Row vector 1x196 to replace with displacement values
for i= 1:195
    if i<10
        filename = ['C:\Users\jrtow\OneDrive\Documents\MATLAB\EN2106_Coursework_Datasets_updated\Dataset2\150617_100kA_C001H001S0001000' num2str(i) '40.tif' ];%Changes file name incrimentally until the 9th picture
        file = imread(filename);
        maxBrightness = max(file(:));
        [rowImage, columnImage] = find(file == maxBrightness);%Finds the possition of the brightest pixel
        D = max(rowImage(:));
        Displacement(i) = D - B1
         %Finds the displacement in pixels between first and following images
    elseif i<=10 && i<100
        filename = ['C:\Users\jrtow\OneDrive\Documents\MATLAB\EN2106_Coursework_Datasets_updated\Dataset2\150617_100kA_C001H001S000100' num2str(i) '40.tif'];%Changes file name incrimentally for the remaining pictures
        file = imread(filename);
        maxBrightness = max(file(:));
        [rowImage, columnImage] = find(file == maxBrightness);
        D = max(rowImage(:));
        Displacement = D - B1
    end
end

Answer 1

[Adam Danz]

There are a few problems.

1) You should allocate Displacement prior to the i-loop just like you did for variable "A".

Displacement = zeros(1,196); 

2) The "elseif" section of your conditional doesn't make much sence since if i<=10, it's also <= 100 and the first part of the conditional also looks for values less than 10. So that should be cleaned up.

3) The reason the "Displacement" variable isn't correct is because you forgot to index i in the elseif section of the conditional. 'Displacement' is correctly filled for the first 10 iterations and then it's overwritten for all subsequent iterations.

Displacement = D - B1  
% Should be 
Displacement(i) = D - B1