MATLAB: For Loop in Data

datafor loop

How can I convert those y's in just one FOR loop?

x= [0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0 ];

y1=x(2:end) – x(1:end-1)

y2=x(3:end) – x(1:end-2)

y3=x(4:end) – x(1:end-3)

y4=x(5:end) – x(1:end-4)

x = [0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0 ];
y = cell(1, 4);
for k = 1:4
  y{k} = x(1-k:end) - x(1:end-k);
end

Prefer a cell array instead of hiding indices in the names of variables.

You cannot use an indexed variable for a "for" loop variable.

By the way:

X = dec2bin(0:2^9-1) - '0';
mask = sum(X, 2) == 5;
X5 = X(mask, :);

Now X5 is a (something) by 9 array in which every row has sum 5. You can work on your processing from there.

You have

t=0:.1:10;

so t is a vector containing 0.0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0

You have

while (y(t)>=0)

but t is the vector discussed above, so your line is equivalent to asking

while y([0.0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0]) >= 0

However, this attempts to subscript y with 0 and non-integers.