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