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C++ Mathematical Expression Library (ExprTk) https://www.partow.net/programming/exprtk/index.html

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Arash Partow
2021-01-01 00:00:00 +00:00
committed by ArashPartow
parent 93a9f44f99
commit 17ba4d15e2
26 changed files with 4516 additions and 3259 deletions
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12
exprtk_simple_example_13.cpp
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@ -3,7 +3,7 @@
* C++ Mathematical Expression Toolkit Library *
* *
* Simple Example 13 *
* Author: Arash Partow (1999-2020) *
* Author: Arash Partow (1999-2021) *
* URL: http://www.partow.net/programming/exprtk/index.html *
* *
* Copyright notice: *
@ -28,8 +28,8 @@ template <typename T>
void savitzky_golay_filter()
{
typedef exprtk::symbol_table<T> symbol_table_t;
typedef exprtk::expression<T> expression_t;
typedef exprtk::parser<T> parser_t;
typedef exprtk::expression<T> expression_t;
typedef exprtk::parser<T> parser_t;
const std::string sgfilter_program =
" var weight[9] := "
@ -69,15 +69,15 @@ void savitzky_golay_filter()
// Generate a signal with noise.
for (T t = T(-5); t <= T(+5); t += T(10.0 / n))
{
T noise = T(0.5 * (rand() / (RAND_MAX + 1.0) - 0.5));
const T noise = T(0.5 * (rand() / (RAND_MAX + 1.0) - 0.5));
v_in.push_back(sin(2.0 * pi * t) + noise);
}
v_out.resize(v_in.size());
symbol_table_t symbol_table;
symbol_table.add_vector("v_in" , v_in);
symbol_table.add_vector("v_out",v_out);
symbol_table.add_vector("v_in" , v_in );
symbol_table.add_vector("v_out", v_out);
expression_t expression;
expression.register_symbol_table(symbol_table);