ordering-class: Ordering functions

In DEIB-GECO/RGMQL: GenoMetric Query Language for R/Bioconductor

Ordering functions

Description

These functions are used to create a series of metadata as string that require ordering on value; it is used only in arrange method (see example).

Usage

DESC(...)

ASC(...)

Arguments

...	series of metatdata as string

Details

• ASC: It defines an ascending order for input value

• DESC: It defines a descending order for input value

Value

Ordering object

Examples

## This statement initializes and runs the GMQL server for local execution 
## and creation of results on disk. Then, with system.file() it defines 
## the path to the folder "DATASET" in the subdirectory "example"
## of the package "RGMQL" and opens such file as a GMQL dataset named 
## "data" using CustomParser

init_gmql()
test_path <- system.file("example", "DATASET", package = "RGMQL")
data = read_gmql(test_path)

## This statement orders the samples according to the Region_Count metadata 
## attribute and takes the two samples that have the lowest count. 

asc = arrange(data, list(ASC("Region_Count")), fetch_opt = "mtop", 
    num_fetch = 2)

## This statement orders the regions of each samples according to their 
## pvalue attribute value and in each sample it takes the first seven
## regions with the highest pvalue
 
desc = arrange(data, regions_ordering = list(DESC("pvalue")), 
    reg_fetch_opt = "rtop", reg_num_fetch = 7)

DEIB-GECO/RGMQL documentation built on Feb. 17, 2024, 10:39 p.m.