histogram2d

Synopsis

Create a 2D histogram from a pair of axes and a pair of sample arrays

histogram2d( x, y, x_grid, y_grid )

Description

The histogram2d command creates a histogram array from an pair of samples and a pair of axes.

• x - array of x values
• y - array of y values
• x_grid - array of x bin edges
• y_grid - array of y bin edges

Example

sherpa> dataspace2d( [216, 261] )
sherpa> x, y = get_axes()
sherpa> n = histogram2d( val0, val1, x, y )
sherpa> set_dep( n )

A binned 2D histogram is stored in the blank image created by the dataspace2d and set_dep commands.

Bugs

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

See Also

data

copy_data, dataspace1d, dataspace2d, delete_data, fake, get_axes, get_bkg_plot, get_counts, get_data, get_data_plot, get_dep, get_dims, get_error, get_quality, get_specresp, get_staterror, get_syserror, group, load_ascii, load_data, load_grouping, load_quality, set_data, set_quality, ungroup, unpack_ascii, unpack_data

filtering

get_filter, load_filter, set_filter

info

get_default_id, list_data_ids, list_response_ids

modeling

clean

plotting

plot_data, set_xlinear, set_xlog, set_ylinear, set_ylog

saving

save_error, save_filter, save_grouping, save_quality, save_staterror, save_syserror

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, get_ratio, get_resid, histogram1d, image_data, rebin