Changeset 0390040 in sasview for src/sas/sasgui/perspectives/corfunc
- Timestamp:
- Jul 12, 2016 6:50:09 AM (8 years ago)
- Branches:
- master, ESS_GUI, ESS_GUI_Docs, ESS_GUI_batch_fitting, ESS_GUI_bumps_abstraction, ESS_GUI_iss1116, ESS_GUI_iss879, ESS_GUI_iss959, ESS_GUI_opencl, ESS_GUI_ordering, ESS_GUI_sync_sascalc, costrafo411, magnetic_scatt, release-4.1.1, release-4.1.2, release-4.2.2, ticket-1009, ticket-1094-headless, ticket-1242-2d-resolution, ticket-1243, ticket-1249, ticket885, unittest-saveload
- Children:
- 2fe78566
- Parents:
- 8bdc103
- Location:
- src/sas/sasgui/perspectives/corfunc/media
- Files:
-
- 3 added
- 1 edited
Legend:
- Unmodified
- Added
- Removed
-
TabularUnified src/sas/sasgui/perspectives/corfunc/media/corfunc_help.rst ¶
r41345d7e r0390040 92 92 93 93 If Fourier is selected for the transform type, the perspective will perform a 94 discrete cosine transform tothe extrapolated data in order to calculate the94 discrete cosine transform on the extrapolated data in order to calculate the 95 95 correlation function. The following algoritm is applied: 96 96 … … 103 103 ^^^^^^^ 104 104 If Hilbert is selected for the transform type, the perspective will perform a 105 Hilbert transform tothe extraplated data in order to calculate the Volume105 Hilbert transform on the extraplated data in order to calculate the Volume 106 106 Fraction Profile. 107 107 … … 128 128 * Polydispersity :math:`= \Gamma_{\text{min}}/\Gamma_{\text{max}}` 129 129 * Local Crystallinity :math:`= L_c/L_p` 130 131 .. ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ 132 133 Usage 134 ----- 135 Upon sending data to the correlation function perspective, it will plot the data 136 , as well as a red bar indicating the lower Q range (used for 137 back-extrapolation), and 2 purple bars indicating the upper qrange (used for 138 forwards-extraplation) [figure 3]. These bars may be moved my clicking and 139 dragging, or by entering the appropriate value in the Q range input boxes. 140 141 .. figure:: tutorial1.png 142 :align: center 143 144 **Figure 3** A plot of some data showing the Q range bars 145 146 Once the Q ranges have been set, click the "Calculate" button next to the 147 background input field to calculate the Bonart thermal background level. 148 Alternatively, enter your own value into the field. Click the "Extrapolate" 149 button to extrapolate the data and plot the extrapolation in the same figure 150 as the original data. [figure 4] 151 152 .. figure:: tutorial2.png 153 :align: center 154 155 **Figure 4** A plot showing the extrapolated data and the original data 156 157 Then, select which type of transform you would like to perform, using the radio 158 buttons: 159 160 * **Fourier** Perform a Fourier Transform to calculate the correlation 161 function of the extrapolated data 162 * **Hilbert** Perform a Hilbert Transform to calculate the volume fraction 163 profile of the extrapolated data 164 165 Clicking the transform button will then perform the selected transform and plot 166 it in a new figure. If a Fourier Transform was performed, the "Compute 167 Parameters" button can also be clicked to calculate values for the output 168 parameters [figure 5] 169 170 .. figure:: tutorial3.png 171 :align: center 172 173 **Figure 5** The Fourier Transform (correlation function) of the 174 extrapolated data, and the parameters extracted from it.
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