From 07e18043145f3d91c8ea7ec3ad41b3c905585277 Mon Sep 17 00:00:00 2001 From: Ethan Werner Date: Wed, 1 Jul 2026 09:42:39 +0400 Subject: initial commit: ts time series analysis library v0.1.0 - 354 financial and mathematical time-series indicators - Uniform C11 API with consistent function signatures - 349 passing tests with -Werror - Static and shared library builds - pkg-config integration - Python bindings - Fuzzing and sanitizer support - Security hardening flags --- lib/root.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) create mode 100755 lib/root.c (limited to 'lib/root.c') diff --git a/lib/root.c b/lib/root.c new file mode 100755 index 0000000..a5e7dca --- /dev/null +++ b/lib/root.c @@ -0,0 +1,48 @@ +// Nth Root +// +// n_root - nrt +// +// f( x ) = x^( 1 / n ) +// +// X_n - 1 +// Y_n - 1 +// C_n - 1 +// +// c[0] = n + + +#include +#include "ts.h" + + +typedef struct { + fp_t r; +} ts_root_params_t; + +ts_parameter_t const ts_root_p = { .n_inputs = 1, .n_outputs = 1, .n_constants = 1, .params_size = sizeof(ts_root_params_t) }; + + +uint_t ts_root_offset( ts_constant_t const *c ) +{ + ( void )c; + return ( 0 ); +} + +int ts_root( + 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_root_p ); + if ( !c ) return -1; + fp_t r = ((ts_root_params_t *)c)->r; + if (r == 0) return -1; + + for( uint_t i = 0; i < n; ++i ) + { + y[0][i] = pow( x[0][i], _ts_reciprocal( r ) ); + } + return 0; +} + -- cgit v1.3.1