Analysis routines

Files
file	ana_compute_residual.c
file	ana_def_cutfn.c
file	ana_get_svd_coeffs.c
file	ana_set_cutfn.c
file	bpm_analysis.h
	libbpm analysis routines
Defines
#define	BPM_GOOD_EVENT
#define	BPM_BAD_EVENT
#define	ANA_SVD_TILT
#define	ANA_SVD_NOTILT
Functions
EXTERN int	ana_set_cutfn (int(*cutfn)(bpmproc_t *proc))
EXTERN int	ana_get_svd_coeffs (bpmproc_t **proc, int num_bpms, int num_svd, int total_num_evts, double *coeffs, int mode)
EXTERN int	ana_compute_residual (bpmproc_t **proc, int num_bpms, int num_evts, double *coeffs, int mode, double *mean, double *rms)
EXTERN int	ana_def_cutfn (bpmproc_t *proc)
Variables
EXTERN int(*)	ana_cutfn (bpmproc_t *proc)

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Define Documentation

#define BPM_GOOD_EVENT

A good event

Definition at line 28 of file bpm_analysis.h.

Referenced by ana_compute_residual(), ana_def_cutfn(), ana_get_svd_coeffs(), and ana_set_cutfn().

#define BPM_BAD_EVENT

A bad event

Definition at line 29 of file bpm_analysis.h.

#define ANA_SVD_TILT

Include tilts in the SVD

Definition at line 31 of file bpm_analysis.h.

Referenced by ana_compute_residual(), and ana_get_svd_coeffs().

#define ANA_SVD_NOTILT

Don't include tilts in the SVD

Definition at line 32 of file bpm_analysis.h.

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Function Documentation

EXTERN int ana_set_cutfn

(

int(*)(bpmproc_t *proc)

cutfn

)

Set the cut function

Parameters:

cutfn

a pointer to the cut function with a bpmproc_t as argument

Returns:

BPM_SUCCESS upon success, BPM_FAILURE upon failure

Definition at line 8 of file ana_set_cutfn.c.

References ana_cutfn, bpm_error(), and BPM_GOOD_EVENT.

EXTERN int ana_get_svd_coeffs	(	bpmproc_t **	proc,
		int	num_bpms,
		int	num_svd,
		int	total_num_evts,
		double *	coeffs,
		int	mode
	)

Perform the SVD on the given data and return the coefficients. The index 0 bpmconf is the bpm to be regressed against and the remainder are put into the regression. The coeffs array must be valid up to the number of arguments approapriate to mode.

Parameters:

	proc	pointer to the the processed bpm databuffer
	num_bpms	the number of bpms in the array
	num_svd	number of svd constants
	total_num_evts	total number of events in the buffer
	coeffs	the array of correlation coefficients that is returned
	mode	mode option: take tilts into account in the SVD ?

Returns:

BPM_SUCCESS upon success, BPM_FAILURE upon failure

Definition at line 9 of file ana_get_svd_coeffs.c.

References ana_cutfn, ANA_SVD_TILT, BPM_GOOD_EVENT, gsl_linalg_SV_decomp(), gsl_linalg_SV_solve(), gsl_matrix_calloc(), gsl_matrix_set(), gsl_vector_calloc(), gsl_vector_get(), and gsl_vector_set().

EXTERN int ana_compute_residual	(	bpmproc_t **	proc,
		int	num_bpms,
		int	num_evts,
		double *	coeffs,
		int	mode,
		double *	mean,
		double *	rms
	)

Calculate the mean and rms of the residual fomr the given events. Note that the mode and svd coefficients must 'match' as with ana_get_svd_coeffs()

Parameters:

	proc	pointer to the the processed bpm databuffer
	num_bpms	the number of bpms in the array
	num_evts	total number of events in the buffer
	coeffs	the array of correlation coefficients
	mode	mode option: take tilts into account in the SVD ?
	mean	the returned mean
	rms	the returned rms

Definition at line 8 of file ana_compute_residual.c.

References ana_cutfn, ANA_SVD_TILT, BPM_GOOD_EVENT, and bpmproc::ddc_pos.

EXTERN int ana_def_cutfn

(

bpmproc_t *

proc

)

The default cut function if people cut be bothered to do their own :)

Parameters:

proc

the event to decide

Returns:

BPM_GOOD_EVENT if the event is good, BPM_BAD_EVENT if it isn't

Definition at line 10 of file ana_def_cutfn.c.

References BPM_GOOD_EVENT.

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Variable Documentation

EXTERN int(*) ana_cutfn(bpmproc_t *proc)

A user cut function to allow cuts to be applied while selecting events for SVD, etc.

Definition at line 100 of file bpm_analysis.h.

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