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Added symbolic differentiation

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This commit is contained in:
maartenkeijzer 2005-10-09 07:03:35 +00:00
commit ffdce66c98
12 changed files with 186 additions and 61 deletions
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33
eo/contrib/mathsym/fun/FunDef.h
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@ -88,25 +88,36 @@ extern Sym SymVar(unsigned idx);
/** simplifies a sym (sym_operations.cpp) */
extern Sym simplify(Sym sym);
/** differentiates a sym to a token (sym_operations.cpp) */
extern Sym differentiate(Sym sym, token_t var_token);
/** differentiates a sym to a token (sym_operations.cpp)
* The token can be a variable or a constant
*/
extern Sym differentiate(Sym sym, token_t dx);
struct differentiation_error{}; // thrown in case of ifltz
/* Add function to the language table (and take a guess at the arity) */
class LanguageTable;
extern void add_function_to_table(LanguageTable& table, token_t token);
// token names
extern const token_t sum_token;
extern const token_t prod_token;
extern const token_t inv_token;
extern const token_t min_token;
extern const token_t pow_token;
extern const token_t ifltz_token;
enum {
sum_token,
prod_token,
inv_token,
min_token,
pow_token,
ifltz_token,
sin_token, cos_token, tan_token,
asin_token, acos_token, atan_token,
sinh_token, cosh_token, tanh_token,
acosh_token, asinh_token, atanh_token,
exp_token, log_token,
sqr_token, sqrt_token
};
#define HEADERFUNC(name) extern const token_t name##_token;\
inline Sym name(Sym arg) { return Sym(name##_token, arg); }
#define HEADERFUNC(name) inline Sym name(Sym arg) { return Sym(name##_token, arg); }
/* This defines the tokens: sin_token, cos_token, etc. */
HEADERFUNC(inv);
HEADERFUNC(sin);
HEADERFUNC(cos);
HEADERFUNC(tan);