docs: accidentally cut out one case (#197)

Author: jokasimr

docs/user-guide/beer/beer_modulation_mcstas.ipynb

@@ -527,6 +527,101 @@
     "\n",
     "da.bins.concat().hist(two_theta=1000, event_time_offset=1000).plot(norm='log')"
    ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "41",
+   "metadata": {},
+   "source": [
+    "## Duplex sample (M4)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "42",
+   "metadata": {},
+   "source": [
+    "### Intensity distribution in detector"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "43",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "wf = BeerModMcStasWorkflowKnownPeaks()\n",
+    "wf[Filename[SampleRun]] = mcstas_duplex(16)\n",
+    "wf.compute(DetectorData[SampleRun])['bank1'].hist(two_theta=1000, event_time_offset=1000).plot(norm='log')"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "44",
+   "metadata": {},
+   "source": [
+    "### Known peaks workflow"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "45",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "wf[DHKLList] = duplex_peaks_array()\n",
+    "da = wf.compute(DetectorTofData[SampleRun])\n",
+    "da = da.transform_coords(('dspacing',), graph=scn.conversion.graph.tof.elastic('tof'),)\n",
+    "ground_truth_peak_positions(da.hist(dspacing=dspacing, dim=da.dims).plot(), duplex_peaks_array())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "46",
+   "metadata": {},
+   "source": [
+    "### Automatic peak finder workflow"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "47",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "wf = BeerModMcStasWorkflow()\n",
+    "wf[Filename[SampleRun]] = mcstas_duplex(16)\n",
+    "da = wf.compute(DetectorTofData[SampleRun])\n",
+    "da = da.transform_coords(('dspacing',), graph=scn.conversion.graph.tof.elastic('tof'),)\n",
+    "ground_truth_peak_positions(da.hist(dspacing=dspacing, dim=da.dims).plot(), duplex_peaks_array())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "48",
+   "metadata": {},
+   "source": [
+    "#### Data that was excluded because tof could not be computed\n",
+    "\n",
+    "The most common reason this happens is overlap between nearby peaks."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "49",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "da = da['bank2'].copy()\n",
+    "da.masks.clear()\n",
+    "da.bins.masks['too_far_from_center'] = ~da.bins.masks.pop('too_far_from_center')\n",
+    "\n",
+    "da.bins.concat().hist(two_theta=1000, event_time_offset=1000).plot(norm='log')"
+   ]
   }
  ],
  "metadata": {