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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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24
exprtk_simple_example_16.cpp
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@ -3,7 +3,7 @@
* C++ Mathematical Expression Toolkit Library *
* *
* Simple Example 16 *
* Author: Arash Partow (1999-2020) *
* Author: Arash Partow (1999-2021) *
* URL: http://www.partow.net/programming/exprtk/index.html *
* *
* Copyright notice: *
@ -27,8 +27,8 @@ template <typename T>
void linear_least_squares()
{
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 linear_least_squares_program =
" if (x[] == y[]) "
@ -55,11 +55,11 @@ void linear_least_squares()
T rmse = T(0);
symbol_table_t symbol_table;
symbol_table.add_variable("alpha",alpha);
symbol_table.add_variable("beta" ,beta );
symbol_table.add_variable("rmse" ,rmse );
symbol_table.add_vector ("x" ,x );
symbol_table.add_vector ("y" ,y );
symbol_table.add_variable("alpha", alpha);
symbol_table.add_variable("beta" , beta );
symbol_table.add_variable("rmse" , rmse );
symbol_table.add_vector ("x" , x );
symbol_table.add_vector ("y" , y );
expression_t expression;
expression.register_symbol_table(symbol_table);
@ -69,10 +69,10 @@ void linear_least_squares()
expression.value();
printf("alpha: %15.12f\n",alpha);
printf("beta: %15.12f\n",beta );
printf("rmse: %15.12f\n",rmse );
printf("y = %15.12fx + %15.12f\n",beta,alpha);
printf("alpha: %15.12f\n", alpha);
printf("beta: %15.12f\n", beta );
printf("rmse: %15.12f\n", rmse );
printf("y = %15.12fx + %15.12f\n", beta, alpha);
}
int main()