Loop for 1:100

for i=1:101
    A_cont(i,i:i+100)=AH(1:101);
    A_low_cont(i,i:i+100)=A_low(1:101);
    A_high_cont(i,i:i+100)=A_high(1:101);
    B_cont(i,i:i+100)=B1(1:101);
    C_cont(i,i:i+100)=C1(1:101);
end

Unrecognized function or variable 'AH'.

I have this code but I'm not sure what does (i,i:i+100) would mean in this loop. Does it calculate i for every step through i+100? How would the matrix look like?

Answer 1

[Torsten]

A_cont is a matrix of size 101 x 201.

In row i of A_cont, the array AH(1:101) is stored in columns i to i+100 (thus in the part in and above the diagonal) for all i ranging from 1 to 101.

The lower diagonal part of A_cont consists of zeros.

Same for the other matrices involved.

[Marko Niko]

Hi Torsten,

Could you elaborate on the "lower diagonal" part of A_cont? Would be great if you can visualize it.

Thank you so much.

[Torsten]

AH = rand(1,101);
A_cont = zeros(101,201);
for i = 1:101
    A_cont(i,i:i+100)=AH(1:101);
end
spy(A_cont)