def g(n):
A = random_matrix( RDF, n );
c = A.diagonal();
for i in range( n ):
for j in range( n ):
A[i,j] = abs( A[i,j] );
r = sum( A.transpose() ).list();
for i in range( n ):
r[i] -= A[i, i];
p = circle( (c[0], 0), r[i], rgbcolor=(0,1,0) );
for i in range( 1, n ):
p += circle( (c[i], 0), r[i], rgbcolor=(i/n,1-i/n,mod(i,2)) );
p.show( aspect_ratio=1 );
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g(6)
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