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+ version 0.1.04

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+ stricter interface
This commit is contained in:
rob tillaart 2015-03-06 15:59:49 +01:00
parent 18febddfea
commit a4312c1b98
2 changed files with 27 additions and 25 deletions
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32
libraries/Histogram/histogram.cpp
View File

@ -2,7 +2,7 @@
//
// FILE: Histogram.h
// AUTHOR: Rob Tillaart
// VERSION: 0.1.03
// VERSION: 0.1.04
// PURPOSE: Histogram library for Arduino
// DATE: 2012-11-10
//
@ -13,23 +13,24 @@
// 0.1.1 - 2012-11-10 added PMF() and CDF()
// 0.1.2 - 2012-12-23 changed float to double; some comments
// 0.1.03 - 2013-09-29 testing a lot & refactoring
// 0.1.04 - 2015-03-06 stricter interface
//
// Released to the public domain
//
#include "histogram.h"
Histogram::Histogram(int len, double *bounds)
Histogram::Histogram(const uint8_t len, double *bounds)
{
_bounds = bounds;
_len = len+1;
_len = len + 1;
_data = (long*) malloc((_len) * sizeof(long));
clear();
}
Histogram::~Histogram()
{
free(_data); // free may still has a bug :(
free(_data); // free may still have a bug :(
}
// resets all counters
@ -43,14 +44,14 @@ void Histogram::clear()
}
// adds a new value to the histogram - increasing
void Histogram::add(double f)
void Histogram::add(const double f)
{
_data[find(f)]++;
_cnt++;
}
// adds a new value to the histogram - decreasing
void Histogram::sub(double f)
void Histogram::sub(const double f)
{
_data[find(f)]--;
_cnt++;;
@ -69,14 +70,14 @@ unsigned long Histogram::count()
}
// returns the count of a bucket
long Histogram::bucket(uint8_t idx)
long Histogram::bucket(const uint8_t idx)
{
if (idx > _len) return 0;
return _data[idx];
}
// returns the relative frequency of a bucket
double Histogram::frequency(uint8_t idx)
double Histogram::frequency(const uint8_t idx)
{
if (_cnt == 0) return NAN;
if (idx > _len) return 0; // diff with PMF
@ -85,7 +86,7 @@ double Histogram::frequency(uint8_t idx)
// EXPERIMENTAL
// returns the probability of the bucket of a value
double Histogram::PMF(double val)
double Histogram::PMF(const double val)
{
if (_cnt == 0) return NAN;
uint8_t idx = find(val);
@ -95,7 +96,7 @@ double Histogram::PMF(double val)
// EXPERIMENTAL
// returns the cummulative probability of
// values <= value
double Histogram::CDF(double val)
double Histogram::CDF(const double val)
{
if (_cnt == 0) return NAN;
uint8_t idx = find(val);
@ -110,13 +111,14 @@ double Histogram::CDF(double val)
// EXPERIMENTAL
// returns the value of the original array for
// which the CDF is at least prob.
double Histogram::VAL(double prob)
double Histogram::VAL(const double prob)
{
if (_cnt == 0) return NAN;
if (prob < 0.0) prob = 0.0;
if (prob > 1.0) prob = 1.0;
double p = prob;
if (p < 0.0) p = 0.0;
if (p > 1.0) p = 1.0;
double value = prob * _cnt;
double value = p * _cnt;
long sum = 0;
for (uint8_t i = 0; i < _len; i++)
{
@ -127,7 +129,7 @@ double Histogram::VAL(double prob)
}
// returns the bucket number for value val
uint8_t Histogram::find(double val)
uint8_t Histogram::find(const double val)
{
for (uint8_t i = 0; i< (_len-1); i++)
{

20
libraries/Histogram/histogram.h
View File

@ -20,27 +20,27 @@
#include "WProgram.h"
#endif
#define HISTOGRAM_LIB_VERSION "0.1.03"
#define HISTOGRAM_LIB_VERSION "0.1.04"
class Histogram
{
public:
Histogram(int len, double *bounds);
Histogram(const uint8_t len, double *bounds);
~Histogram();
void clear();
void add(double val);
void sub(double val);
void add(const double val);
void sub(const double val);
uint8_t size();
unsigned long count();
long bucket(uint8_t idx);
long bucket(const uint8_t idx);
double frequency(uint8_t idx);
double PMF(double val);
double CDF(double val);
double VAL(double prob);
uint8_t find(double f);
double frequency(const uint8_t idx);
double PMF(const double val);
double CDF(const double val);
double VAL(const double prob);
uint8_t find(const double f);
// void strategy();
protected: