# HG changeset patch # User cs76 # Date 1449486313 18000 # Node ID 5cd5308cc3981eae2aa17d4cc60a322f6b6438f8 Uploaded - version 0.1 diff -r 000000000000 -r 5cd5308cc398 ipo.xml --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/ipo.xml Mon Dec 07 06:05:13 2015 -0500 @@ -0,0 +1,51 @@ + + : A Tool for automated Optimization of XCMS Parameters + ipo.R $input $html_file $html_file.files_path + + + + + + + +**IPO - Version 0.1** + +Version 0.1 uses the following XCMS parameters as default + +> peakpickingParameters$min_peakwidth : c(10,20) + +> peakpickingParameters$max_peakwidth : c(26,42) + +> peakpickingParameters$ppm : 20 + +> peakpickingParameters$nSlaves : 4 # as.numeric(args[3]) + +> type : "centWave" + +----- + +**IPO optimization process** + +.. image:: ${static_path}/images/ipo.jpg + :height: 400 + :width: 429 + +----- + +To optimize parameters different values (levels) have to tested for these parameters. To efficiently test many different levels design of experiment (DoE) is used. Box-Behnken and central composite designs set three evenly spaced levels for each parameter. The method 'getDefaultXcmsSetStartingParams' provides default values for the lower and upper levels defining a range. Since the levels are evenly spaced the middle level or center point is calculated automatically. To edit the starting levels of a parameter set the lower and upper level as desired. If a parameter should not be optimized, set a single default value for 'xcms' processing, do not set this parameter to NULL. + +The method 'getDefaultXcmsSetStartingParams' creates a list with default values for the optimization of the peak picking methods 'centWave' or 'matchedFilter'. To choose between these two method set the parameter accordingly. + +----- + +The method 'optimizeXcmsSet' has the following parameters: + +> **files**: the raw data which is the basis for optimization. This does not necessarly need to be the whole dataset, only quality controls should suffice. + +> **params**: a list consisting of items named according to 'xcms' peak picking methods parameters. A default list is created by 'getDefaultXcmsSetStartingParams'. + +> **nSlaves**: the number ofexperiments of an DoE processed in parallel + +> **subdir**: a directory where the response surface models are stored. Can also be NULL if no rsm's should be saved. + + \ No newline at end of file