dbGetExperimentInfo {maDB}R Documentation

List information about an experiment from the database.

Description

dbGetExperimentInfo lists all experiments that are stored in the maDB database, or returns informations from a particular experiment. Refer to the package vignette for furhter informations or examples (vignette can be opened using the openMadbVignette function).

Usage

dbGetExperimentInfo(Con,exp.title)

Arguments

Con The connection to the maDB database (created using the dbConnect function from the RdbiPgSQL function).
exp.title The experiment title (name) from the experiment which properties should be listet. If nothing is submitted a list with all experiments that are stored in the database is displayed.

Details

This function collects information about the specified experiment (database) by joining several database tables. A table is returned, that contains all primary keys or foreign keys with wich all data can be accessed for the particular experiment from the various tables. This tables are:

experiments
Primary information about the experiment
arrays
the arrays od GeneChips which where used in the experiment
signal_channels
in two color micro arrays two signal channels exist and therefore two entries in the signal_channels table reference to one entry in the arrays table. For Affymetrix GeneChips the reference is one to one.
exp_values
this table contains all the expression values from the corresponding signal channels of the experiment. The reference to the signal_channels table is established by the signal_channels_fk column in the exp_values table.
samples
Each entry in this table references to one or more entries in the signal_channels table. This table contains informations about the samples that were hybridized onto the arrays.

Author(s)

Johannes Rainer

See Also

dbGetAnnotation publishToDB dbGetComparisons MadbSet-class


[Package maDB version 1.12.0 Index]