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D.11.4.4 exp2pt
Procedure from library findifs.lib (see findifs_lib).
- Usage:
- exp2pt(P[,L]); P poly, L an optional list of strings
- Return:
- string
- Purpose:
- convert a polynomial M into the TeX format, in nodal form
- Assume:
- coefficients must not be fractional
- Note:
- an optional list L contains a string, which will replace the default
value 'u' for the discretized function
Example:
| | LIB "findifs.lib";
" EXAMPLE:";
==> EXAMPLE:
ring r = (0,dh,dt),(Tx,Tt),dp;
poly M = (4*dh*Tx^2+1)*(Tt-1)^2;
print(exp2pt(M));
==> 4\tri h u^{n+2}_{j+2}+(-8\tri h) u^{n+1}_{j+2}+4\tri h u^{n}_{j+2}+u^{n+2\
}_{j}+(-2) u^{n+1}_{j}+u^{n}_{j}
print(exp2pt(M,"F"));
==> 4\tri h F^{n+2}_{j+2}+(-8\tri h) F^{n+1}_{j+2}+4\tri h F^{n}_{j+2}+F^{n+2\
}_{j}+(-2) F^{n+1}_{j}+F^{n}_{j}
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