Python EnggUtils.convert_to_d_spacing方法代码示例

# 需要导入模块: import EnggUtils [as 别名]
# 或者: from EnggUtils import convert_to_d_spacing [as 别名]
    def PyExec(self):
        # Get the run workspace
        input_ws = self.getProperty('InputWorkspace').value

        # Get spectra indices either from bank or direct list of indices, checking for errors
        bank = self.getProperty('Bank').value
        spectra = self.getProperty(self.INDICES_PROP_NAME).value
        indices = EnggUtils.get_ws_indices_from_input_properties(input_ws, bank, spectra)

        detector_positions = self.getProperty("DetectorPositions").value
        n_reports = 8
        prog = Progress(self, start=0, end=1, nreports=n_reports)

        # Leave only the data for the bank/spectra list requested
        prog.report('Selecting spectra from input workspace')
        input_ws = EnggUtils.crop_data(self, input_ws, indices)

        prog.report('Masking some bins if requested')
        self._mask_bins(input_ws, self.getProperty('MaskBinsXMins').value, self.getProperty('MaskBinsXMaxs').value)

        prog.report('Applying vanadium corrections')
        # Leave data for the same bank in the vanadium workspace too
        vanadium_ws = self.getProperty('VanadiumWorkspace').value
        van_integration_ws = self.getProperty('VanIntegrationWorkspace').value
        van_curves_ws = self.getProperty('VanCurvesWorkspace').value
        EnggUtils.apply_vanadium_corrections(parent=self, ws=input_ws, indices=indices, vanadium_ws=vanadium_ws,
                                             van_integration_ws=van_integration_ws, van_curves_ws=van_curves_ws,
                                             progress_range=(0.65, 0.8))

        prog.report("Applying calibration if requested")
        # Apply calibration
        if detector_positions:
            self._apply_calibration(input_ws, detector_positions)

        # Convert to dSpacing
        prog.report("Converting to d")
        input_ws = EnggUtils.convert_to_d_spacing(self, input_ws)

        prog.report('Summing spectra')
        # Sum the values across spectra
        input_ws = EnggUtils.sum_spectra(self, input_ws)

        prog.report('Preparing output workspace')
        # Convert back to time of flight
        input_ws = EnggUtils.convert_to_TOF(self, input_ws)

        prog.report('Normalizing input workspace if needed')
        if self.getProperty('NormaliseByCurrent').value:
            self._normalize_by_current(input_ws)

        # OpenGenie displays distributions instead of pure counts (this is done implicitly when
        # converting units), so I guess that's what users will expect
        self._convert_to_distribution(input_ws)

        if bank:
            self._add_bank_number(input_ws, bank)

        self.setProperty("OutputWorkspace", input_ws)

# 需要导入模块: import EnggUtils [as 别名]
# 或者: from EnggUtils import convert_to_d_spacing [as 别名]
    def _divide_by_curves(self, ws, curves):
        """
        Expects a workspace in ToF units. All operations are done in-place (the workspace is
        input/output). For every bank-curve pair, divides the corresponding spectra in the
        workspace by the (simulated) fitted curve. The division is done in d-spacing (the
        input workspace is converted to d-spacing inside this method, but results are converted
        back to ToF before returning from this method). The curves workspace is expected in
        d-spacing units (since it comes from fitting a sum of spectra for a bank or group of
        detectors).

        This method is capable of dealing with workspaces with range and bin size different from
        the range and bin size of the curves. It will rebin the curves workspace to match the
        input 'ws' workspace (using the algorithm RebinToWorkspace).

        @param ws :: workspace with (sample) spectra to divide by curves fitted to Vanadium spectra

        @param curves :: dictionary of fitting workspaces (in d-spacing), one per bank. The keys are
        the bank identifier and the values are their fitting workspaces. The fitting workspaces are
        expected as returned by the algorithm 'Fit': 3 spectra: original data, simulated data with fit,
        difference between original and simulated data.
        """
        # Note that this division could use the algorithm 'Divide'
        # This is simple and more efficient than using divide workspace, which requires
        # cropping separate workspaces, dividing them separately, then appending them
        # with AppendSpectra, etc.
        ws = EnggUtils.convert_to_d_spacing(self, ws)
        for b in curves:
            # process all the spectra (indices) in one bank
            fitted_curve = curves[b]
            idxs = EnggUtils.get_ws_indices_for_bank(ws, b)

            if not idxs:
                pass

            # This RebinToWorkspace is required here: normal runs will have narrower range of X values,
            # and possibly different bin size, as compared to (long) Vanadium runs. Same applies to short
            # Ceria runs (for Calibrate -non-full) and even long Ceria runs (for Calibrate-Full).
            rebinned_fit_curve = mantid.RebinToWorkspace(WorkspaceToRebin=fitted_curve, WorkspaceToMatch=ws,
                                                         StoreInADS=False)

            for i in idxs:
                # take values of the second spectrum of the workspace (fit simulation - fitted curve)
                ws.setY(i, np.divide(ws.dataY(i), rebinned_fit_curve.readY(1)))

        # finally, convert back to ToF
        EnggUtils.convert_to_TOF(self, ws)

# 需要导入模块: import EnggUtils [as 别名]
# 或者: from EnggUtils import convert_to_d_spacing [as 别名]
    def _fit_curves_per_bank(self, vanadium_ws, banks, spline_breaks, prog):
        """
        Fits one curve to every bank (where for every bank the data fitted is the result of
        summing up all the spectra of the bank). The fitting is done in d-spacing.

        @param vanadium_ws :: Vanadium run workspace to fit, expected in TOF units as they are archived
        @param banks :: list of banks to consider which is normally all the banks of the instrument
        @param spline_breaks :: number of break points when fitting spline functions
        @param prog :: progress reporter

        @returns a workspace with fitting results for all banks (3 spectra per bank). The spectra
        are in dSpacing units.
        """
        curves = {}
        for bank_number, bank in enumerate(banks):
            prog.report("Fitting bank {} of {}".format(bank_number + 1, len(banks)))
            indices = EnggUtils.get_ws_indices_for_bank(vanadium_ws, bank)
            if not indices:
                # no indices at all for this bank, not interested in it, don't add it to the dictionary
                # (as when doing Calibrate (not-full)) which does CropData() the original workspace
                continue

            prog.report("Cropping")
            ws_to_fit = EnggUtils.crop_data(self, vanadium_ws, indices)
            prog.report("Converting to d-spacing")
            ws_to_fit = EnggUtils.convert_to_d_spacing(self, ws_to_fit)
            prog.report("Summing spectra")
            ws_to_fit = EnggUtils.sum_spectra(self, ws_to_fit)

            prog.report("Fitting bank {} to curve".format(bank_number))
            fit_ws = self._fit_bank_curve(ws_to_fit, bank, spline_breaks, prog)
            curves.update({bank: fit_ws})

        curves_ws = self._prepare_curves_ws(curves)

        return curves_ws