Synopsis
Create the independent axis for a 2D data set.
Syntax
dataspace2d(dims, id=None, dstype=DataIMG)
Description
Create an "empty" two-dimensional data set by defining the grid on which the points are defined (the independent axis). The values are set to 0.
Examples
Example 1
Create a 200 pixel by 150 pixel grid (number of columns by number of rows) and display it (each pixel has a value of 0):
>>> dataspace2d([200, 150]) >>> image_data()
Example 2
Create a data space called "fakeimg":
>>> dataspace2d([nx, ny], id="fakeimg")
PARAMETERS
The parameters for this function are:
| Parameter | Type information | Definition |
|---|---|---|
| dims | sequence of 2 number | The dimensions of the grid in (width,height) order. |
| id | int, str, or None, optional | The identifier for the data set to use. If not given then the default identifier is used, as returned by `get_default_id` . |
| dstype | data class to use, optional | What type of data is to be used. Supported values include `DataIMG` (the default), `Data2D` , and `Data2DInt` . |
Bugs
See the bugs pages on the Sherpa website for an up-to-date listing of known bugs.
See Also
- data
- copy_data, dataspace1d, datastack, delete_data, fake, get_axes, get_bkg_chisqr_plot, get_bkg_delchi_plot, get_bkg_fit_plot, get_bkg_model_plot, get_bkg_plot, get_bkg_ratio_plot, get_bkg_resid_plot, get_bkg_source_plot, get_counts, get_data, get_data_contour, get_data_contour_prefs, get_data_image, get_data_plot, get_data_plot_prefs, get_dep, get_dims, get_error, get_quality, get_specresp, get_staterror, get_syserror, group, group_adapt, group_adapt_snr, group_bins, group_counts, group_snr, group_width, load_arf, load_arrays, load_ascii, load_bkg, load_bkg_arf, load_bkg_rmf, load_data, load_grouping, load_image, load_multi_arfs, load_multi_rmfs, load_pha, load_quality, load_rmf, load_staterror, load_syserror, load_table, pack_image, pack_pha, pack_table, set_data, set_dep, set_quality, ungroup, unpack_arf, unpack_arrays, unpack_ascii, unpack_bkg, unpack_data, unpack_image, unpack_pha, unpack_rmf, unpack_table
- filtering
- get_filter, load_filter, set_filter
- info
- get_default_id, list_bkg_ids, list_data_ids, list_response_ids
- modeling
- add_model, add_user_pars, clean, load_table_model, load_template_interpolator, load_template_model, load_user_model, save_model, save_source
- plotting
- plot_data, set_xlinear, set_xlog, set_ylinear, set_ylog
- saving
- save_arrays, save_data, save_delchi, save_error, save_filter, save_grouping, save_image, save_pha, save_quality, save_resid, save_staterror, save_syserror, save_table
- statistics
- load_user_stat
- utilities
- calc_data_sum, calc_data_sum2d, calc_ftest, calc_kcorr, calc_mlr, calc_model_sum2d, calc_source_sum2d, get_rate
- visualization
- contour, contour_data, contour_ratio, histogram1d, histogram2d, image_data, rebin