io.warp10.script.functions

Class LTTB

java.lang.Object

io.warp10.script.NamedWarpScriptFunction

io.warp10.script.GTSStackFunction

io.warp10.script.functions.LTTB

All Implemented Interfaces:

WarpScriptStackFunction

public class LTTB
extends GTSStackFunction

Downsamples a GTS using LTTB (Largest Triangle Three Bucket)

See Also:

http://skemman.is/stream/get/1946/15343/37285/3/SS_MSthesis.pdf

Constructor Summary

Constructors

Constructor and Description
LTTB(java.lang.String name, boolean timebased)

Method Summary

Modifier and Type	Method and Description
protected GeoTimeSerie	gtsOp(java.util.Map<java.lang.String,java.lang.Object> params, GeoTimeSerie gts) Method to apply to individual GTS instances
protected java.util.Map<java.lang.String,java.lang.Object>	retrieveParameters(WarpScriptStack stack) Method which extracts the parameters from the top of the stack

Methods inherited from class io.warp10.script.GTSStackFunction

apply

Methods inherited from class io.warp10.script.NamedWarpScriptFunction

getName, refSnapshot, setName, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

LTTB

public LTTB(java.lang.String name,
            boolean timebased)

Method Detail

gtsOp

protected GeoTimeSerie gtsOp(java.util.Map<java.lang.String,java.lang.Object> params,
                             GeoTimeSerie gts)
                      throws WarpScriptException

Description copied from class: GTSStackFunction

Method to apply to individual GTS instances

Specified by:

gtsOp in class GTSStackFunction

Throws:

WarpScriptException

retrieveParameters

protected java.util.Map<java.lang.String,java.lang.Object> retrieveParameters(WarpScriptStack stack)
                                                                       throws WarpScriptException

Description copied from class: GTSStackFunction

Method which extracts the parameters from the top of the stack

Specified by:

retrieveParameters in class GTSStackFunction

Throws:

WarpScriptException