How do I code this for loop?

Question

0 个投票

vd_inc is a matrix where I obtain values from, I then want to store p1-p5 in a matrix.

p1= 0;

p2 = p1+ vd_inc(31);

p3= p2 + vd_inc(30);

p4 = p3+ vd_inc(29);

p5= p4 + vd_inc(28);

This is my attempt, the problem is that p(index) is going up in increments and vd_inc is decreasing, 2 for loops are required?

for index1 = 1:31

index1=1

p(index+1)= p(index)+ vd_inc(index);

end

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Answer 1

DGM 2021-6-11

0 个投票

I don't know how you're getting anything out of it, since the index isn't even being used.

You could do this:

vd_inc = 1:100;
p = zeros(1,5);
for index = 1:numel(p)-1
    p(index+1)= p(index)+ vd_inc(31-index+1);
end
p
p = 1×5
     0    31    61    90   118

but you really don't even need the loop

p = [0 cumsum(vd_inc(31:-1:28))]
p = 1×5
     0    31    61    90   118

JM321 2021-6-11

Forgot to add the 1 to make it index1, thanks for your help