documentation:fit
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documentation:fit [2011/09/27 18:08] – created 142.103.140.43 | documentation:fit [2015/09/09 08:56] (current) – macke | ||
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+ | == Defined fit variables for compound mode == | ||
+ | |||
+ | ^ Variable | ||
+ | | thickness | ||
+ | | delta | -0.1 | 0.1 | | ||
+ | | beta | 0. |0.1 | | ||
+ | | sigma | 0. |20 | | ||
+ | | deltam | ||
+ | | betam | -10*betam | ||
+ | |||
+ | == Defined fit variables for additional magnetization profile in compound mode == | ||
+ | | gauss_delta | ||
+ | | gauss_beta | ||
+ | | gauss_variance | ||
+ | | gauss_z | ||
+ | |||
+ | |||
+ | == Defined fit variables for element mode == | ||
+ | ^ elemental Variable | ||
+ | | thickness | ||
+ | | f1 | ? | ? | | ||
+ | | f2 | ? | ? | | ||
+ | | sigma | 0. |20 | | ||
+ | | f1m | 0. | 0. | | ||
+ | | f2m | 0. | 0. | | ||
+ | |||
+ | == General fit variables == | ||
+ | ^ Variable | ||
+ | | angular resolution| 0. | 0.1 | | ||
+ | | measurement multiplicator | 0.1*multiplicator | ||
+ | | qz translation | -1 | 1 | | ||
+ | | script variable (par)| 0 | 2 | | ||
+ | |||
+ | |||
+ | Note: The simplex algorithm will not fit variables with an initial value of 0. | ||
+ | |||
+ | == Fits of multiple curves at the same time == | ||
+ | By activating multiple datasets for fitting it is possible to minimize the Chi^2 error of all curves at the same time with the same set of parameters. | ||
+ | |||
+ | The parameters that can be changed for each measurement curve are the energy, angular resolution, multiplicator, | ||
+ | If multiple curves should be fitted at the same time the optical constants should not be fitted as they change for each energy. Instead it is recommed that in the tab " | ||
+ | If the optical constants should be fitted as well use the script and script variables. | ||
+ | |||