ENsetnodevalue {epanet2toolkit}

Set the parameter value for a node.

Description

ENsetnodevalue sets parameter value for one node.

Usage

ENsetnodevalue(index, paramcode = NULL, value = NULL)

Arguments

index

An integer vector, the node index.

paramcode

An integer vector, the parameter code (see Details below).

value

A numeric vector, the new value of the parameter.

Details

Nodes are indexed starting from 1 in the order in which they were entered into the [NODES] section of the EPANET input file.

Node parameter codes consist of the following constants:

EN_ELEVATION	0	Elevation
EN_BASEDEMAND	1	Base demand
EN_PATTERN	2	Demand pattern index
EN_EMITTER	3	Emitter coeff.
EN_INITQUAL	4	Initial quality
EN_SOURCEQUAL	5	Source quality
EN_SOURCEPAT	6	Source pattern index
EN_SOURCETYPE	7	Source type (see note below)
EN_TANKLEVEL	8	Initial water level in tank

Source types are identified with the following constants:

EN_CONCEN	0
EN_MASS	1
EN_SETPOINT	2
EN_FLOWPACED	3

See [SOURCES] for a description of these source types.

Values are supplied in units which depend on the units used for flow rate in the EPANET input file (see Units of Measurement).

Value

returns NULL invisibly on success or raises an error or warning.

Examples

# path to Net1.inp example file included with this package
inp <- file.path( find.package("epanet2toolkit"), "extdata","Net1.inp")  
ENopen( inp, "Net1.rpt")
ENgetnodevalue(3, "EN_ELEVATION")
ENsetnodevalue(3, "EN_ELEVATION", 777)
ENgetnodevalue(3, "EN_ELEVATION")
ENclose()