Struct faiss::MatrixStats

struct MatrixStats

Reports some statistics on a dataset and comments on them.

It is a class rather than a function so that all stats can also be accessed from code

Public Functions

MatrixStats(size_t n, size_t d, const float *x)

void do_comment(const char *fmt, ...)

Public Members

std::string comments

size_t n

size_t d

size_t n_collision

size_t n_valid

size_t n0

double min_norm2

double max_norm2

std::vector<PerDimStats> per_dim_stats

std::unordered_map<uint64_t, Occurrence> occurrences

char *buf

size_t nbuf

struct Occurrence

Public Members

size_t first

size_t count

struct PerDimStats

Public Functions

PerDimStats()

void add(float x)

void compute_mean_std()

Public Members

size_t n

size_t n_nan

size_t n_inf

size_t n0

float min

float max

double sum

double sum2

size_t n_valid

double mean

double stddev