Causes the specified
2-D data to be displayed, with a surface plot, via ChIPS.
sherpa> SPLOT [<num_plots>] <arg_1> [# [ID]] [<arg_2> [# [ID]] ...]
<num_plots> specifies the number of plotting windows to open within the
ChIPS pane (default 1); that number sets the number of subsequent
arguments. For each subsequent argument, # specifies the number of the
dataset (default dataset number is 1), and the ID modifier is used for
displaying background datasets, and then if and only if the Sherpa
state object variable multiback is set to 1, i.e., if more than one
background dataset is to be associated with a single source dataset.
The ID modifier may be any unreserved string (e.g., A, foo, etc.),
i.e., a string that is not a parsable command.
The argument <arg_n> may be any of the following:
SPLOT Command Arguments
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{{DATA | DCOUNTS} |
{BACK | BDCOUNTS}}
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The source|background data values
|
|
{ERRORS |
BERRORS}
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The estimated total errors for the source|background data values
|
|
{SYSERRORS |
BSYSERRORS}
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The assigned systematic errors for the source|background data values
|
|
{STATERRORS |
BSTATERRORS}
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The estimated statistical errors for the source|background data values
|
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{{MODEL | MCOUNTS} |
{BMODEL | BMCOUNTS}}
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The (convolved) source|background model amplitudes
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{DELCHI |
BDELCHI}
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The sigma residuals of the source|background fit: (data - model)/error
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{RESIDUALS |
BRESIDUALS}
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The absolute residuals of the source|background fit: (data - model)
|
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{RATIO |
BRATIO}
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The ratio (data/model) for source|background
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{CHI SQU |
BCHISQU}
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The contributions to the chi-square statistic
from each source|background data point
|
|
{STATISTIC |
BSTATISTIC}
|
The contributions to the current statistic
from each source|background data point
|
|
{WEIGHT |
BWEIGHT}
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The statistic weight value assigned to each source|background data point
|
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{FILTER |
BFILTER}
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The mask value (0|1) for each source|background data point
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<sherpa_model_stack>
|
The (unconvolved) model amplitudes for the
specified model stack (SOURCE,
{BACKGROUND|BG}, or
[B]NOISE)
|
|
<model_stack>
|
The (unconvolved) model amplitudes for the
specified user-defined model stack
|
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<sherpa_modelname>
|
The (unconvolved) amplitudes of the specified model component
(e.g., GAUSS2D)
|
|
<modelname>
|
The (unconvolved) amplitudes of the specified model component
(e.g., g)
|
|
{EXPMAP |
BEXPMAP}
|
The unfiltered source|background 2-D EXPMAP file contents
|
|
{PSF |
BPSF}
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The unfiltered source|background 2-D PSF file contents
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If there is no open plotting window when an SPLOT command
is given, one will be created automatically.
If one issues the SPLOT following filtering,
note the following: arbitrarily
filtered data cannot be passed from Sherpa
to ChIPS for display; the data grid must be rectangular.
Therefore, surface plots are created in three steps: (1)
the smallest possible rectangle is drawn around the noticed data;
(2) within this rectangle, the
<data to image> is tranformed to
<data to image> * filter; and (3)
these transformed data are sent off to ChIPS for display.
The appearance of plots generated with this command can be changed
by modifying the fields of certain state objects. See the ahelp for
Sherpa or for
sherpa.plot for more information.
NOTE:
all ChIPS commands may be used from within
Sherpa to modify plot characteristics. In order to view
these changes, the REDRAW
command must be issued.
The Display chapter of the Sherpa Manual has more
information regarding data display capabilities, including modifying
various plot characteristics.
Display 2-D data with a surface plot:
sherpa> DATA 3 example2Da.dat ASCII 1 2 3
sherpa> SPLOT DATA 3
The SPLOT command plots dataset number 3 as a surface plot.
Dataset number 3 must be a 2-D dataset.
Display 2-D datasets with surface plots in multiple windows:
sherpa> DATA 1 example2Db.dat ASCII 1 2 3
sherpa> SPLOT 2 DATA 1 DATA 3
This command displays a surface plot of dataset number 1
(example2Db.dat) in the first window,
and a surface plot of dataset number 3 (example2Da.dat)
in the second window.
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