Reset the contents of an already existing Db

Functions
Id	gstlrn::Db::resetFromSamples (Id nech, const ELoadBy &order=ELoadBy::fromKey("SAMPLE"), const 1 &tab=1(), const VectorString &names=VectorString(), const VectorString &locatorNames=VectorString(), bool flagAddSampleRank=true)
Id	gstlrn::Db::resetFromCSV (const String &filename, bool verbose, const CSVformat &csvfmt, Id ncol_max=-1, Id nrow_max=-1, bool flagAddSampleRank=true)
Id	gstlrn::Db::resetFromBox (Id nech, const 1 &coormin, const 1 &coormax, Id ndim=2, double extend=0., Id seed=321415, bool flagAddSampleRank=true)
Id	gstlrn::Db::resetFromOnePoint (const 1 &tab=1(), bool flagAddSampleRank=true)
Id	gstlrn::Db::resetSamplingDb (const Db *dbin, double proportion=0, Id number=0, const VectorString &names=VectorString(), Id seed=23241, bool verbose=false, bool flagAddSampleRank=true)
Id	gstlrn::Db::resetReduce (const Db *dbin, const VectorString &names=VectorString(), const 1 &ranks=1(), bool verbose=false)
Id	gstlrn::Db::resetFromGridRandomized (const DbGrid *dbin, double randperc=0., bool flagAddSampleRank=true)

Detailed Description

All methods enabling to Reset the contents of an already existing Db.

They clean the initial contents and replace it by the new one.

Function Documentation

resetFromBox()

Id gstlrn::Db::resetFromBox	(	Id	nech,
		const 1 &	coormin,
		const 1 &	coormax,
		Id	ndim = 2,
		double	extend = 0.,
		Id	seed = 321415,
		bool	flagAddSampleRank = true
	)

Create a Db generating samples randomly

Parameters

nech	Number of samples to be generated
coormin	Vector giving the smallest values of the coordinates
coormax	Vector giving the largest values for the coordinates
ndim	Space dimension (used if 'coormin' and 'coormax' are empty)
extend	Extension of the bounding box (if positive)
seed	Seed for the random number generator
flagAddSampleRank	true if the Sample ranks must be generated

resetFromCSV()

Id gstlrn::Db::resetFromCSV	(	const String &	filename,
		bool	verbose,
		const CSVformat &	csvfmt,
		Id	ncol_max = -1,
		Id	nrow_max = -1,
		bool	flagAddSampleRank = true
	)

Creating a Db by reading a CSV file

Parameters

filename	Name of the CSV file
verbose	Verbose flag
csvfmt	Description of the CSV format
ncol_max	Maximum number of columns
nrow_max	Maximum number of rows
flagAddSampleRank	true if the sample rank must be generated

resetFromGridRandomized()

Id gstlrn::Db::resetFromGridRandomized	(	const DbGrid *	dbin,
		double	randperc = 0.,
		bool	flagAddSampleRank = true
	)

resetFromOnePoint()

Id gstlrn::Db::resetFromOnePoint	(	const 1 &	tab = 1(),
		bool	flagAddSampleRank = true
	)

Create a Db from a single sample whose coordinates are provided in 'tab'

Parameters

tab	Array containing the coordinates of the single sample
flagAddSampleRank	true if the Sample ranks must be generated

resetFromSamples()

Id gstlrn::Db::resetFromSamples	(	Id	nech,
		const ELoadBy &	order = ELoadBy::fromKey("SAMPLE"),
		const 1 &	tab = 1(),
		const VectorString &	names = VectorString(),
		const VectorString &	locatorNames = VectorString(),
		bool	flagAddSampleRank = true
	)

resetReduce()

Id gstlrn::Db::resetReduce	(	const Db *	dbin,
		const VectorString &	names = VectorString(),
		const 1 &	ranks = 1(),
		bool	verbose = false
	)

resetSamplingDb()

Id gstlrn::Db::resetSamplingDb	(	const Db *	dbin,
		double	proportion = 0,
		Id	number = 0,
		const VectorString &	names = VectorString(),
		Id	seed = 23241,
		bool	verbose = false,
		bool	flagAddSampleRank = true
	)

Sampling an input Db to create the output Db by selecting a subset of samples

Parameters

dbin	Pointer to the input Db
proportion	Proportion of samples to be retained
number	Number of samples to be retained
names	Vector of Names to be copied (empty: all names)
seed	Seed used for the random number generator
verbose	Verbose flag
flagAddSampleRank	true if the sample rank must be generated

Remarks

A possible selection in 'dbin' will not be taken into account

You can use either 'proportion' or 'number'