pca.cpp File Reference

#include <sstream>
#include "pca.h"

Include dependency graph for pca.cpp:

Go to the source code of this file.

Macros
#define	rotate(a, i, j, k, l)

Functions
std::ostream &	operator<< (std::ostream &out, const PCAAnalyzer &PC)
std::istream &	operator>> (std::istream &in, PCAAnalyzer &PC)
std::ostream &	operator<< (std::ostream &out, const PCA_set &PS)
std::istream &	operator>> (std::istream &in, PCA_set &PS)

Macro Definition Documentation

rotate

#define rotate	(		a,
			i,
			j,
			k,
			l
	)

Value:

g = a[i][j]; \
    h = a[k][l]; \
    a[i][j] = g - s *(h + g*tau); \
    a[k][l] = h + s*(g - h*tau);

Function Documentation

operator<<() [1/2]

std::ostream& operator<<	(	std::ostream &	out,
		const PCAAnalyzer &	PC
	)

Show relevant eigenvectors and eigenvalues

Definition at line 369 of file pca.cpp.

{
    out << "Relevant Dimension: " << PC.get_Dimension() << std::endl;
    out << "Mean vector: ";
    int size = PC.mean.size();
    out << "(" << size << ") ---> ";
    for (int j = 0; j < size; j++)
        out << PC.mean[j] << " ";
    out << std::endl;
    for (int i = 0; i < PC.get_Dimension(); i++)
    {
        out << PC.eigenval[i] << " (" << size << ") ---> ";
        for (int j = 0; j < size; j++)
            out << PC.eigenvec[i][j] << " ";
        out << std::endl;
    }
    return out;
}

operator<<() [2/2]

std::ostream& operator<<	(	std::ostream &	out,
		const PCA_set &	PS
	)

Show all PCA

Definition at line 438 of file pca.cpp.

{
    int imax = PS.PCA.size();
    out << "Number of PCAs: " << imax << std::endl;
    for (int i = 0; i < imax; i++)
        out << PS.PCA[i];
    return out;
}

operator>>() [1/2]

std::istream& operator>>	(	std::istream &	in,
		PCAAnalyzer &	PC
	)

Read a set of PCA just as shown

Definition at line 388 of file pca.cpp.

{
    PC.clear();
    int D;
    std::string read_line;
    getline(in, read_line);
    sscanf(read_line.c_str(), "Relevant Dimension: %d", &D);
    PC.set_Dimension(D);
    PC.eigenval.resize(D);
    PC.eigenvec.resize(D);

    int size;
    getline(in, read_line);
    sscanf(read_line.c_str(), "Mean vector: (%d) --->", &size);
    read_line.erase(0, read_line.find('>') + 1); // remove until --->
    PC.mean.resize(size);
    std::istringstream istr1(read_line.c_str());
    for (int j = 0; j < size; j++)
        istr1 >> PC.mean[j];

    for (int i = 0; i < D; i++)
    {
        getline(in, read_line);
        float f;
        sscanf(read_line.c_str(), "%f (%d) ---> ", &f, &size);
        PC.eigenval[i] = f;
        read_line.erase(0, read_line.find('>') + 1); // remove until --->
        PC.eigenvec[i].resize(size);
        std::istringstream istr2(read_line.c_str());
        for (int j = 0; j < size; j++)
            istr2 >> PC.eigenvec[i][j];
    }

    return in;
}

operator>>() [2/2]

std::istream& operator>>	(	std::istream &	in,
		PCA_set &	PS
	)

Read a set of PCA just as shown

Definition at line 447 of file pca.cpp.

{
    int imax;
    std::string read_line;
    getline(in, read_line);
    sscanf(read_line.c_str(), "Number of PCAs: %d\n", &imax);
    PS.PCA.resize(imax);
    for (int i = 0; i < imax; i++)
    {
        in >> PS.PCA[i];
    }
    return in;
}