File r37/lisp/csl/html/r37_0586.html artifact 1297d6558e part of check-in dc9552dc80

<A NAME=diagonal>

<TITLE>diagonal</TITLE></A>
<b><a href=r37_idx.html>INDEX</a></b><p><p>



<B>DIAGONAL</B> _ _ _  _ _ _  _ _ _  _ _ _ <B>operator</B><P>
<P>
 
<P>
<P>
 <P> <H3> 
syntax: </H3>
<em>diagonal</em>({&lt;mat\_list&gt;}) 
<P>
<P>
<P>
(If you are feeling lazy then the braces can be omitted.) 
<P>
<P>
&lt;mat\_list&gt; :- each can be either a scalar expression or a 
square 
<A HREF=r37_0345.html>matrix</A>. 
<P>
<P>
<em>diagonal</em>creates a matrix that contains the input on the 
diagonal. 
<P>
<P>
 <P> <H3> 
examples: </H3>
<P><PRE><TT>

H := mat((66,77),(88,99)); 

       [66  77]
  h := [      ]
       [88  99]



diagonal({A,x,H}); 

  [1  2  3  0  0   0 ]
  [                  ]
  [4  5  6  0  0   0 ]
  [                  ]
  [7  8  9  0  0   0 ]
  [                  ]
  [0  0  0  x  0   0 ]
  [                  ]
  [0  0  0  0  66  77]
  [                  ]
  [0  0  0  0  88  99]

</TT></PRE><P>Related functions: 

<A HREF=r37_0596.html>jordan_block</A>. 
<P>
<P>