userguide:retentiontimerecomputing
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userguide:retentiontimerecomputing [2010/07/19 16:29] 132.168.74.230 créée |
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| ====== Retention Time Recomputing ====== | ====== Retention Time Recomputing ====== | ||
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| + | ===== Steps followed by the Retention Time Recomputing algorithm ===== | ||
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| + | {{ :userguide:rtrecomputingconcept1.png|}} | ||
| + | - For each 'parent' species from the selected User context (i.e. User context for which RT Recomputing is needed) | ||
| + | - Collect RTs for all final child species | ||
| + | - Can apply linear regression coefficients | ||
| + | - Can remove outliers using Grubbs method | ||
| + | * Critical values for a 0.05 significance level are used | ||
| + | * The test is used for # of values greater or equal to 3 | ||
| + | * Each time a value is removed, the test is repeated. | ||
| + | * More details on Grubb's test [[http://en.wikipedia.org/wiki/Grubbs%27_test_for_outliers|here]] | ||
| + | - Compute the 'parent' RT value from one of the following statistical method (the previous RT value is then overwritten by the new one): | ||
| + | * Average | ||
| + | * Median | ||
| + | * Weighted average (by score) | ||
| + | * Best score per identification + average | ||
| + | * Best score per identification + median | ||
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userguide/retentiontimerecomputing.1279549780.txt.gz · Last modified: 2010/07/19 16:29 by 132.168.74.230
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