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en:processing:персистентная_длина [2012/07/04 10:44] Анастасия Большакова |
en:processing:персистентная_длина [2012/07/04 11:49] Анастасия Большакова |
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- | ====== Persistent lenght calculation ====== | + | ====== Persistence length calculation ====== |
+ | ===== Add curve ===== | ||
- | For pesistent lenght calculation first, you need to choose a curve, using the tool [[Выделение кривых|Curve selection]]. | + | For pesistence length calculation, first you need to choose a curve, using the tool [[Выделение кривых|Curve selection]]. |
- | After curve selection, press the button "Add curve to list" {{:en:processing:perslen_big.png?200|}}. | + | After selecting the curve, press the button "Add curve to list" {{:en:processing:perslen_big.png|}}. |
- | Then choose (or create) data file with curves. | ||
- | {{:en:processing:list_curves.png?200|}} | ||
- | Press the button "Ok". | ||
- | After that, choose another ciurve, and add it into the data file with list of curves. | + | 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. |
- | For persistent lenght calculation go [[меню Математика|Mathematics]]->Persistent lenght->Evaluate | + | The coordinates of the curve points will be stored in this file. |
- | {{:en:processing:perlen-evaluate.png?200|}} | + | |
+ | {{:en:processing:list_curves.png|}} | ||
+ | Press the "Ok" button. | ||
+ | |||
+ | |||
+ | After that, choose other curve, and add it into the data file with the curves list. | ||
+ | |||
+ | For reliable result you need to collect in data file at least 100 curves. | ||
+ | |||
+ | ===== Evaluate ===== | ||
+ | |||
+ | For persistence length calculation go to the menu [[меню Математика|Mathematics]]->Persistence length->Evaluate: | ||
+ | |||
+ | {{:en:processing:perlen-evaluate.png?400|}} | ||
+ | |||
+ | After this operation three new windows will appear in the main window: | ||
+ | |||
+ | |||
+ | - 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 | ||
+ | |||
+ | {{:en:processing:perlen-value.png?300|}}(1) | ||
+ | {{:en:processing:perlen-graph.png?300|}}(2) | ||
+ | {{:en:processing:perlen-data.png?200|}}(3) | ||
+ | |||
+ | Where "Maximum curve length" is a limit on the horizintal axis, | ||
+ | "Averaging step" is a value of the step averaging. | ||
+ | |||
+ | For more details see our video channel: http://youtu.be/dWqAfaWDqZc |