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function [tt]=pol2tex(a)
// Latex source code for the scilab polynomial matrix a.
// (For use with texprint)
//!
//origine S Steer INRIA 1989
//
// Copyright INRIA
p=string(coeff(a))
z=varn(a)
lz=length(z)
while part(z,lz)==' ' then lz=lz-1,end
z=part(z,1:lz)
//
np=prod(size(p));ok=' ',tt=' ',
//coeff degree 0
if part(p(1),1)<>'-' then
if p(1)<>'0' then
tt=tt+ok+p(1)
ok='+'
end
else
ok='+'
tt=tt+p(1)
end
if np==1 then
if ok==' ' then tt='0',end
return,
end
//coeff degree 1
if part(p(2),1)<>'-' then
select p(2)
case '0',
case '1' then tt=tt+ok+z,ok='+'
else tt=tt+ok+p(2)+' '+z,ok='+'
end
else
if p(2)=='-1' then
tt=tt+'-'+z
else
tt=tt+p(2)+' '+z
end
ok='+'
end
//other coefficients
for i=3:np
if part(p(i),1)<>'-' then
select p(i)
case '0',
case '1' then tt=tt+ok+z+'^{'+string(i-1)+'}',ok='+'
else tt=tt+ok+p(i)+' '+z+'^{'+string(i-1)+'}',ok='+'
end
else
ok='+'
if p(i)=='-1' then
tt=tt+'-'+z+'^{'+string(i-1)+'}'
else
tt=tt+p(i)+' '+z+'^{'+string(i-1)+'}'
end
end
end
if ok==' ' then tt='0',end
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