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Last modified: December 2007

URL: http://cxc.harvard.edu/sherpabeta/get_data.py.html

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atten - py sl
 
B
bbodyfreq - py sl
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beta1d - py sl
beta2d - py sl
box1d - py sl
box2d - py sl
bpl1d - py sl
 
C
const1d - py sl
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D
delta1d - py sl
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dered - py sl
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E
edge - py sl
erfc - py sl
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exp10 - py sl
exp - py sl
 
F
fit - py sl
freeze - py sl
 
G
gauss1d - py sl
gauss2d - py sl
get_data - py sl
get_full_model - py sl
 
H
hubblereynolds - py sl
 
I
ignore2d_id - py sl
ignore2d - py sl
ignore_id - py sl
ignore - py sl
image_data - py sl
image_deleteframes - py sl
image_fit - py sl
image_getregion - py sl
image_model - py sl
image_ratio - py sl
image_resid - py sl
image_setregion - py sl
image_xpaget - py sl
image_xpaset - py sl
int_proj - py sl
int_unc - py sl
 
J
jdpileup - py sl
 
L
linebroad - py sl
load_arf - py sl
load_ascii - py sl
load_data - py sl
load_image - py sl
load_pha - py sl
load_rmf - py sl
load_table_model - py sl
load_table - py sl
log10 - py sl
log - py sl
lorentz1d - py sl
lorentz2d - py sl
 
M
models - py sl
 
N
normbeta1d - py sl
normgauss1d - py sl
notice2d_id - py sl
notice2d - py sl
notice_id - py sl
notice - py sl
 
P
plot_chisqr - py sl
plot_data - py sl
plot_fit - py sl
plot_model - py sl
plot_ratio - py sl
plot_resid - py sl
poisson - py sl
polynom1d - py sl
polynom2d - py sl
powlaw1d - py sl
projection - py sl
psf1d - py sl
psf2d - py sl
 
R
reg_proj - py sl
reg_unc - py sl
 
S
schechter - py sl
set_bkg - py sl
set_coord - py sl
set_method_opt - py sl
set_method - py sl
set_model - py sl
set_par - py sl
set_psf_model - py sl
set_source - py sl
set_stat - py sl
sherpa
show_all - py sl
sin - py sl
sqrt - py sl
stephi1d - py sl
steplo1d - py sl
subtract - py sl
 
T
tablemodel - py sl
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U
unsubtract - py sl
 
X
xsabsori - py sl
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AHELP for Sherpa 4.0 Beta get_data Context: py.sherpa

Synopsis

Return a Sherpa data set by ID.

Syntax

get_data([id])

Description

The Sherpa data ID ties together data, model, fit results and plotting information in a single structure. The ID can be a string or integer. If no ID is given, then the first Sherpa data set is returned.

Example

sherpa> get_data()
sherpa> get_data(1)
sherpa> get_data("src")

The get_data() function returns a variable that grants access to all the information contained in a data set. For example, data that had been read from a simple ASCII file has the following information: 

	  >>> print get_data()
          name      = foo.dat
          x         = Float64[124]
          y         = Float64[124]
          staterror = None
          syserror  = None

While data read from a PHA file has more complex information, including arrays for grouping and quality flags as well as the data: 

	  >>> print get_data()
	  name           = s0_mar24_bin.pha
	  channel        = Int16[512]
	  counts         = Int32[512]
	  staterror      = None
	  syserror       = None
	  bin_lo         = None
	  bin_hi         = None
	  grouping       = Int16[512]
	  quality        = Int16[512]
	  exposure       = 33483.25
	  backscal       = 0.044189453125
	  areascal       = 1.0
	  grouped        = True
	  subtracted     = False
	  units          = energy
	  response_ids   = [1]
	  background_ids = []

Bugs

See the bugs pages on the Sherpa Beta website for an up-to-date listing of known bugs.

See Also

py.sherpa
get_full_model, image_data, load_ascii, load_data, plot_data
Last modified: December 2007


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