diff options
Diffstat (limited to 'lib/cotangent.c')
| -rw-r--r-- | lib/cotangent.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/lib/cotangent.c b/lib/cotangent.c new file mode 100644 index 0000000..b23b6da --- /dev/null +++ b/lib/cotangent.c @@ -0,0 +1,43 @@ +// Cotangent +// +// cotangent - cot +// +// f( x ) = cot( x ) = 1 / tan( x ) +// +// X_n - 1 +// Y_n - 1 +// C_n - 0 + + +#include <math.h> +#include "ts.h" + + + +ts_parameter_t const ts_cotangent_p = { .n_inputs = 1, .n_outputs = 1, .n_constants = 0, .params_size = 0 }; + + +uint_t ts_cotangent_offset( ts_constant_t const *c ) +{ + ( void )c; + return ( 0 ); +} + +int ts_cotangent( + fp_t * const *y, uint_t y_n, + fp_t const * const *x, uint_t x_n, + uint_t n, ts_constant_t const *c +) +{ + TS_PROLOGUE( ts_cotangent_p ); + (void)c; + for( uint_t i = 0; i < n; ++i ) + { + fp_t t = tan( x[0][i] ); + y[0][i] = ( fabs( t ) > 1e-15 ) ? _ts_reciprocal( t ) : ( t > 0 ? (fp_t)INFINITY : (fp_t)-INFINITY ); + } + return 0; +} + + + |