If inside of for loop is not working

This is my reference code, it is working well. g is a 96 x 1 cell.

k = 1;
dx = (65-45)/4; dy = 120/24;
y1 = 0; y2 = y1 + dy; x1 = 45; x2 = x1 + dx;
while y1 <= 120 && x2 <= 65
    g{k} = [x1 x2 y1 y2];
    y1 = y1 + dy; y2 = y2 + dy;
    k = k + 1;
    if y1 == 120
        y1 = 0; y2 = y1 + dy; x1 = x1 + dx; x2 = x2 + dx;
    end
end
g = g';

But this code does not give the correct answer, g should be a 40x1 cell but it gave me 11x1 cell

k = 1;
dx = (3-0)/4; dy = 1/10;
y1 = 0; y2 = y1 + dy; x1 = 0; x2 = x1 + dx;
while y1 <=1 && x2 <=3
    g{k} = [x1 x2 y1 y2];
    y1 = y1 + dy; y2 = y2 + dy;
    k = k + 1;
    if y1 == 1
        y1 = 0; y2 = y1 + dy; x1 = x1 + dx; x2 = x2 + dx;
    end
end
g = g';

Any idea where I did wrong?

Answer 1

[Chunru]

k = 1;
dx = (3-0)/4; dy = 1/10;
y1 = 0; y2 = y1 + dy; x1 = 0; x2 = x1 + dx;
while y1 <=1 && x2 <=3
    %[k, y1, x2]
    g{k} = [x1 x2 y1 y2];
    y1 = y1 + dy; y2 = y2 + dy;
    k = k + 1;
    % Due to the floating point rounding error, y1 == 1 is never be true
    % for this code.  Make change as follows:
    if abs(y1 - 1) < 1e-10
        y1 = 0; y2 = y1 + dy; x1 = x1 + dx; x2 = x2 + dx;
    end
end
g = g'

g = 40×1 cell array
    {[          0 0.7500 0 0.1000]}
    {[     0 0.7500 0.1000 0.2000]}
    {[     0 0.7500 0.2000 0.3000]}
    {[     0 0.7500 0.3000 0.4000]}
    {[     0 0.7500 0.4000 0.5000]}
    {[     0 0.7500 0.5000 0.6000]}
    {[     0 0.7500 0.6000 0.7000]}
    {[     0 0.7500 0.7000 0.8000]}
    {[     0 0.7500 0.8000 0.9000]}
    {[     0 0.7500 0.9000 1.0000]}
    {[     0.7500 1.5000 0 0.1000]}
    {[0.7500 1.5000 0.1000 0.2000]}
    {[0.7500 1.5000 0.2000 0.3000]}
    {[0.7500 1.5000 0.3000 0.4000]}
    {[0.7500 1.5000 0.4000 0.5000]}
    {[0.7500 1.5000 0.5000 0.6000]}

[Muhammad Senna]

Ohh I see, thank you very much