Matlab code for Calculating new matrix values from existing matrix values using for loop

This first matrix table1 contains normalized values for 5 names.I need to perform some operations on this matrix and I have to obtain second matrix as shown in table2.

Diagonal elements of table2 should obtained by giving rank(ordinal value) to each value.That means highest element is given 5th rank and next 4th 3rd and so on.

Remaining elements of table obtained by giving rank to each value starting from 4 because only 4 elements remaining. Because already we are given rank to diagonal elements.Zero should be kept as it is.Suppose take table1 as A matrix and table2 as B matrix.

OPERATION1:For diagonal elements

       B(1,1)=5(first highest element)
       B(2,2)=1(5th highest element)
       B(3,3)=4(4th highest element)
       B(4,4)=2(2nd highest element)
       B(5,5)=3(3rd highest element)

OPERATION2:For remaining elements

          B(1,2)=3(2nd highest element)
          B(1,3)=4(1st  highest element)
          B(1,4)=1(4th highest element)
          B(1,5)=2(3rd highest element)

And so on..

       Table1:

               BASAVARAJ MANOJ  NATESH  VIJAY  GOWDA
          
BASAVARAJ  1.0000  0.2727  0.3182  0.0455  0.2727
MANOJ          0.2727  0.2727    0    0    0
NATESH          0.3182    0  0.4545  0.1818    0
VIJAY          0.0455    0  0.1818  0.2727  0.0909
GOWDA          0.2727    0    0  0.0909  0.3636

       Table2:

                        BASAVARAJ    MANOJ   NATESH  VIJAY  GOWDA

         BASAVARAJ      5         3  4  1  2
         MANOJ              4         1  0  0  0
         NATESH              4         0  4  3  0
         VIJAY              2         0  4  2  3
         GOWDA              4         0  0  3  3

[prashanth]

Anybody give some idea