Ordering-Functions {RGMQL} | R Documentation

## 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)

[Package RGMQL version 1.6.0 Index]