matrix based on vector and diagonal elements=1 using matlab -

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How do I create the following matrix 

  1 0 0 k1 1 0 0 0 k2 k1 1 0 k3 k2 k1 1 k4 k3 k2 k1 1

Usage Please.

Example 

  vector = [1 2 3 4 5]; Change it with values ​​for% 1 [1 k1 k2 k3 k4] = toeplitz (vector, [0]] outside = 1 0 0 0 2 1 0 0 0 0 2 2 0 0 4 3 2 1 0 5 4 3 2 1

Edit

My vector [k1 k2 k3 k4 k5], how do Can I apply tril or toeplitz?

Using more convenient formulation of @ gnovice, you use 

  yourVector = [k1 k2 k3 k4 k5]; Tril (toeplitz ([1 yourVector (1: 4)]))

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