Useful math equations in CCGL. More...
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Namespaces | |
namespace | ccgl |
Common Cross-platform Geographic Library (CCGL) | |
namespace | ccgl::utils_math |
Basic mathematics related functions. | |
Macros | |
#define | Max(a, b) ((a) >= (b) ? (a) : (b)) |
Return maximum value. | |
#define | Min(a, b) ((a) >= (b) ? (b) : (a)) |
Return minimum value. | |
#define | Abs(x) ((x) >= 0 ? (x) : -(x)) |
Return absolute value. | |
Functions | |
template<typename T1 , typename T2 > | |
bool | ccgl::utils_math::FloatEqual (T1 v1, T2 v2) |
Whether v1 is equal to v2. More... | |
float | ccgl::utils_math::Expo (float xx, float upper=20.f, float lower=-20.f) |
Check the argument against upper and lower boundary values prior to doing Exponential function. | |
float | ccgl::utils_math::Power (float a, float n) |
deal with positive and negative float numbers | |
template<typename T > | |
T | ccgl::utils_math::MaxInArray (const T *a, int n) |
Get maximum value in a numeric array with size n. More... | |
template<typename T > | |
T | ccgl::utils_math::MinInArray (const T *a, int n) |
Get minimum value in a numeric array with size n. More... | |
template<typename T > | |
T | ccgl::utils_math::Sum (int row, const T *data) |
Sum of a numeric array Get sum value of a double array with size row. More... | |
template<typename T > | |
T | ccgl::utils_math::Sum (int row, int *&idx, const T *data) |
Sum of a numeric array Get sum value of a double array with size row and real index idx. More... | |
template<typename T > | |
void | ccgl::utils_math::BasicStatistics (const T *values, int num, double **derivedvalues, T exclude=static_cast< T >(NODATA_VALUE)) |
calculate basic statistics at one time_funcs More... | |
template<typename T > | |
void | ccgl::utils_math::BasicStatistics (const T *const *values, int num, int lyrs, double ***derivedvalues, T exclude=static_cast< T >(NODATA_VALUE)) |
calculate basic statistics at one time_funcs for 2D raster data More... | |
float | ccgl::utils_math::ApprSqrt (float z) |
approximate sqrt More... | |
float | ccgl::utils_math::ApprLn (float z) |
Approximates the natural logarithm, (where the base is 'e'=2.71828) | |
float | ccgl::utils_math::pow_lookup (const float exp, const float log_base) |
lookup for pow(a, b) function More... | |
float | ccgl::utils_math::ApprPow (float a, float b) |
Approximates pow(a, b) based on the work of Harrison Ainsworth. More... | |
Useful math equations in CCGL.