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1<html>
2<body>
3
4<h4>2D Data Averaging</h4>
5<ul>
6<li><a href="#Description">Description</a></li>
7<li><a href="#How to use">How to Average? </a></li>
8<p> Available averagings: </p>
9<li><a href="#Circular Average">Perform Circular Average</a></li>
10<li><a href="#Masked Average">Masked Circular Average</a></li>
11<li><a href="#Sector"> Sector [Q view]</a></li>
12<li><a href="#Annulus"> Annulus [Phi view]</a></li>
13<li><a href="#Box sum"> Box sum</a></li>
14<li><a href="#Box averaging in Qx"> Box averaging in Qx</a></li>
15<li><a href="#Box averaging in Qy"> Box averaging in Qy</a></li>
16
17</ul>
18<h5><a name="Description">Description</a></h5>
19<p>
20 This feature allows you to perform different types of averages on your data,
21 and allows you to see what regions of the detector will contribute to
22 the average.
23 The region to be averaged will be drown and can be modified by dragging the lines around.
24</p>
25
26
27<h5><a name="How to use">How to Average?</a></h5>
28<p>
29Right click on 2D data for the context menu to appear. Select one type of averages
30among <b>"sector [Q view]", "Annulus [Phi view]", "Box sum", "Box averaging in Qx ",
31"box averaging on Qy","Perform circular Average".</b>
32</p> 
33<p>
34A slicer will appear except for <b> "Perform circular Average"</b>
35that you can drag by clicking on a slicer 's marker.
36 When the marker is highlighted in red , it means that the slicer can change size.You can
37 also move some of the slicer by simply drag its side when highlighted in red.
38 the slicer size will be reset to its previous size if the user try to select a region greater
39 than the size of the data.
40 
41</p>
42 <p>The user can also select a region to average when a slicer has been selected already by <b>right
43 clicking </b> on the context menu and selecting <b>Edit Slicer Parameters</b>. The dialog window
44 will appears and the user can enter values to selected a region or selected numbers of points to
45 plot <b>nbins</b>.
46</p>
47 
48<p>
49 For <b>Box sum</b> , when the user selects this option, a new panel is created containing
50 the result of average of the sum of every pixels contains on  that data.The user can also enter
51 values to select a region.
52</p>
53
54<h5><a name="Circular Average">Perform Circular Average</a></h5>
55<p>
56It will perform and average in constant q-rings around the (x,y)
57 pixel location of the beam center.
58</p>
59
60
61<h5><a name="Masked Average">Masked Circular Average</a></h5>
62<p>
63This operation is same as 'Perform Circular Average' except that the masked region is excluded if masked.
64</p>
65
66<h5><a name="Sector">Sector [Q view]</a></h5>
67<p>
68It averages in constant q-arcs. The width of the sector
69 is specified in degrees (+/- delta phi) each direction from the central angle (phi).
70</p>
71
72<h5><a name="Annulus"> Annulus [Phi view]</a></h5>
73<p>
74It performs an average between two q-values centered in (0,0),
75 and averaged over a width of a specified number of pixels.
76 The data is returned as a function of angle (phi) in degrees.
77 Moving one circle of this slicer
78 to radius of zero corresponding to a circular averaging on radius qmax ,
79 the outer circle.
80  The angle zero starts from the positive x-axis direction.
81</p>
82
83<h5><a name="Box sum"> Box sum</a></h5>
84<p>
85Perform the sum of counts in a 2D region of interest.When editing the slicer ,the user can
86enter the length and the width the rectangle slicer and the coordinates of the center of this
87rectangle.
88</p>
89<h5><a name="Box averaging in Qx"> Box averaging in Qx</a></h5>
90<p>
91Computes average I(Qx) for a region of interest. When editing the slicer ,the user can
92control the length and the width the rectangle slicer.
93The averaged output is calculated from the constant bins with rectangular shape.
94The resultant q values are nominal values, i.e., the central values of each bins on the x-axis.
95
96</p>
97<h5><a name="Box averaging in Qy"> Box averaging in Qy</a></h5>
98<p>
99 Computes average I(Qy) for a region of interest.When editing the slicer ,the user can
100control the length and the width the rectangle slicer.
101The averaged output is calculated from the constant bins with rectangular shape.
102The resultant q values are nominal values, i.e., the central values of each bins on the y-axis.
103</p>
104
105</body>
106</html>
107
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