ratios from an array

Hello, can anyone help me with this one? I have this array called 'd'. I want to generate a new array called ratio. Answers for array ratio should be calculated as the given example. d1,d2,... are numbers in descending order. I have around 100 numbers in array d. So I am trying to run a code to do the calculations automatically. Thank you.

d=[d1;d2;d3;d4] % example d=[4;3;2;1]

size=length(d)
ratio=zeros(size,size-1)

%calculations
ratio=[0       0       0     ;
       d1/d2   0       0     ; 
       d1/d3   d2/d3   0     ;
       d1/d4   d2/d4   d3/d4  ]

Answer 1

[Ameer Hamza]

try this

d = [4 3 2 1];
ratio = tril(d./d.', -1);
ratio(:,end) = [];

Result:

ratio =
         0         0         0
    1.3333         0         0
    2.0000    1.5000         0
    4.0000    3.0000    2.0000

[Dinu Th.]

Thank you for the quick response. It works.

[Ameer Hamza]

I am glad to be of help.