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en:processing:персистентная_длина [2012/07/04 10:13] Анастасия Большакова created |
en:processing:персистентная_длина [2012/09/05 21:31] Анастасия Большакова [Evaluate] |
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| - | Persistent lenght calculation | + | ====== Persistence length calculation ====== |
| - | For pesistent lenght calculation first, you need to choose a curve, using the item [[Выделение протяженных объектов|Curve selection]] | + | ===== Add curve ===== |
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| + | For pesistence length calculation, first you need to choose a curve, using the tool [[Выделение кривых|Curve selection]]. | ||
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| + | After selecting the curve, press the button "Add curve to list" {{:en:processing:perslen_big.png|}}. | ||
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| + | The dialog with data file name will be shown. You can choose an existing file or enter a new file name - if no such file exist, it will be created. | ||
| + | The coordinates of the curve points will be stored in this file. | ||
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| + | {{:en:processing:list_curves.png|}} | ||
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| + | Press the "Ok" button. | ||
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| + | After that, choose other curve, and add it into the data file with the curves list. | ||
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| + | For reliable result you need to collect in data file at least 100 curves. | ||
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| + | ===== Evaluate ===== | ||
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| + | For persistence length calculation go to the menu [[меню Математика|Mathematics]]->Persistence length->Evaluate: | ||
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| + | {{:en:processing:perlen-evaluate.png?400|}} | ||
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| + | After this operation three new windows will appear in the main window: | ||
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| + | - with calculated persistence length | ||
| + | - with the graph %%<%%Theta<sup>2</sup>%%>%% from contour length of the curve, where Theta is an angle of the curvature along the curve | ||
| + | - with the setup menu of the graph window | ||
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| + | {{:en:processing:perlen-value.png?300|}}(1) | ||
| + | {{:en:processing:perlen-graph.png?300|}}(2) | ||
| + | {{:en:processing:perlen-data.png?200|}}(3) | ||
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| + | Where "Maximum curve length" is a limit on the horizintal axis, | ||
| + | "Averaging step" is a value of the step averaging. | ||
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| + | For more details see our video tutorial: http://youtu.be/dWqAfaWDqZc | ||