#' Fisher test
#'
#' Get all Fisher tests taking in to account a significative variable parameter like FDR values. This function gets all chromatin state regressions and optionally store results in a file
#'
#' @param significative numerical. Variable to take in to account as significative variable, could be FDR, p-value,...
#' @param position dataframe with all relative positions to island values to perform regression
#' @param outputdir optional string. Output path to store file with results, by default results are written in current dir
#' @param outputfile optional string. File name to store results if no name is provided results are not written.
#' @param plots boolean. If plot is TRUE, plot results
#'
#' @return
#'
#' @export
getAllFisherTest <- function(significative, position, outputdir = ".", outputfile = NULL, plots = TRUE )
{
positions <- getUniqueValues(position)
lregs <- lapply(positions, function(x) getFisherTest(significative, ifelse(position == x, "yes", "no"), x) )
ans <- data.frame(matrix(unlist(lregs), nrow=length(positions), byrow=T))
colnames(ans) <- names(lregs[[1]])
if(!is.null(outputfile)) {
if(!is.null(outputdir) & !is.na(outputdir) & outputdir!='.')
dir.create(outputdir, showWarnings = FALSE, recursive = TRUE)
# Output filename
filename <- tools::file_path_sans_ext(basename(outputfile))
write.csv(ans, paste0(file.path( outputdir),"/Fisher_",filename,".csv"))
}
# if( plots )
# plot_RelativetoIsland(ans, outputdir = outputdir ,outputfile = outputfile)
if( plots )
plot_OR(ans, outputdir = outputdir ,outputfile = outputfile)
return(ans)
}
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