SIM (version 1.42.0)

tabulate.top.indep.features: Lists the mean z-scores for the independent features

Description

Lists the mean z-scores for independent features in the analyzed regions, calculated across the significant dependent features. Gives insight in the expression levels most strongly associated with copy number changes.

Usage

tabulate.top.indep.features(input.regions = "all chrs",
							input.region.indep = NULL, method = c("full", "smooth", "window", "overlap"),   adjust.method = "BY",  significance = 1,                            decreasing=TRUE,  z.threshold = c(0, 0),  run.name = "analysis_results")

Arguments

input.regions

vector indicating the dependent regions to be analyzed. Can be defined in four ways: 1) predefined input region: insert a predefined input region, choices are: “all chrs”, “all chrs auto”, “all arms”, “all arms auto” In the predefined regions “all arms” and “all arms auto” the arms 13p, 14p, 15p, 21p and 22p are left out, because in most studies there are no or few probes in these regions. To include them, just make your own vector of arms. 2) whole chromosome(s): insert a single chromosome or a list of chromosomes as a vector: c(1, 2, 3). 3) chromosome arms: insert a single chromosome arm or a list of chromosome arms like c("1q", "2p", "2q"). 4) subregions of a chromosome: insert a chromosome number followed by the start and end position like "chr1:1-1000000" These regions can also be combined, e.g. c("chr1:1-1000000","2q", 3). See integrated.analysis for more information.

input.region.indep

fill in

method

this must be the either one of “full”, “window”, “overlap” or “smooth” but the data should generated by the same method in integrated.analysis.

adjust.method

Method used to adjust the P-values for multiple testing, see p.adjust. Default is "BY" recommended when copy number is used as dependent data. See SIM for more information about adjusting P-values.

significance

threshold used to select the significant dependent features. Only the z-scores with these features are used to calculate the mean z-scores across the independent features.

decreasing

fill in

z.threshold

fill in

run.name

This must be the same a given to integrated.analysis

Value

Returns a list of data.frame's for each input region. Significant P-value rich regions are returned as a data.frame. This data.frame can be used as an input for getoverlappingregions. Additionally, the results are stored in a subdirectory of run.name as txt.

Details

tabulate.top.indep.features can only be run after integrated.analysis with zscores = TRUE.

Output is a .txt file containing a table with the mean z-scores of all independent features per analyzed region. It includes the ann.indep columns that were read in the assemble.data function.

Additionally it returns a .txt file containing the significant zscores rich regions.

Depending on the argument "adjust.method", the P-values are first corrected for multiple testing. Next, th e z-scores are filtered to include only those entries that correspond to significant (P-value < "significa nce") dependent features to calculate the mean z-scores.

The dependent table can not be generated for diagonal integrated runs.

See Also

SIM, tabulate.pvals, tabulate.top.dep.features

Examples

#first run example(assemble.data)
#and example(integrated.analysis)
table.indep <- tabulate.top.indep.features(input.regions="8q",
		                                  adjust.method="BY",
										  method="full",
										  significance= 0.05,										  
										  z.threshold=c(-1, 1),
										  run.name="chr8q")
head(table.indep[["8q"]])