Ordering-Functions {RGMQL} | R Documentation |
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).
DESC(...) ASC(...)
... |
series of metatdata as string |
ASC: It defines an ascending order for input value
DESC: It defines a descending order for input value
Ordering object
## 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)