org.rosuda.REngine
Class REXPDouble

java.lang.Object
  org.rosuda.REngine.REXP
      org.rosuda.REngine.REXPVector
          org.rosuda.REngine.REXPDouble

public class REXPDouble
extends REXPVector

REXPDouble represents a vector of double precision floating point values.

Field Summary

static double

NA NA real value as defined in R.

Fields inherited from class org.rosuda.REngine.REXP

attr, maxDebugItems

Constructor Summary

REXPDouble(double load)
create real vector of the length 1 with the given value as its first (and only) element

REXPDouble(double[] load)

REXPDouble(double[] load, REXPList attr)

Method Summary

double[]	asDoubles() returns the values represented by this vector
int[]	asIntegers() converts the values of this vector into integers by cast
java.lang.Object	asNativeJavaObject() attempt to represent the REXP by a native Java object and return it.
java.lang.String[]	asStrings() converts the values of this vector into strings
boolean[]	isNA() returns a boolean vector of the same length as this vector with true for NA values and false for any other values (including NaNs)
static boolean	isNA(double value) checks whether a given double value is a NA representation in R.
boolean	isNumeric() return true
int	length() returns the length of the vector (i.e. the number of elements)
java.lang.String	toDebugString() returns representation that it useful for debugging (e.g. it includes attributes and may include vector values -- see REXP.maxDebugItems)

Methods inherited from class org.rosuda.REngine.REXPVector

isVector, toString

Methods inherited from class org.rosuda.REngine.REXP

_attr, asBytes, asDouble, asDoubleMatrix, asFactor, asInteger, asList, asString, createDataFrame, createDoubleMatrix, dim, getAttribute, hasAttribute, inherits, isComplex, isEnvironment, isExpression, isFactor, isInteger, isLanguage, isList, isLogical, isNull, isPairList, isRaw, isRecursive, isReference, isString, isSymbol

Methods inherited from class java.lang.Object

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

Field Detail

NA

public static final double NA

NA real value as defined in R. Note: it can NOT be used in comparisons, you must use isNA(double) instead.

Constructor Detail

REXPDouble

public REXPDouble(double load)

create real vector of the length 1 with the given value as its first (and only) element

REXPDouble

public REXPDouble(double[] load)

REXPDouble

public REXPDouble(double[] load,
                  REXPList attr)

Method Detail

isNA

public static boolean isNA(double value)

checks whether a given double value is a NA representation in R. Note that NA is NaN but not all NaNs are NA.

length

public int length()

Description copied from class: REXPVector

returns the length of the vector (i.e. the number of elements)

Specified by:

length in class REXPVector

Returns:

length of the vector

asNativeJavaObject

public java.lang.Object asNativeJavaObject()

Description copied from class: REXP

attempt to represent the REXP by a native Java object and return it. Note that this may lead to loss of information (e.g., factors may be returned as a string array) and attributes are ignored. Not all R types can be converted to native Java objects. Also note that R has no concept of scalars, so vectors of length 1 will always be returned as an arrays (i.e., int[1] and not Integer).

Overrides:

asNativeJavaObject in class REXP

isNumeric

public boolean isNumeric()

return true

Overrides:

isNumeric in class REXP

Returns:

true if the receiver is a numeric vector, false otherwise

asDoubles

public double[] asDoubles()

returns the values represented by this vector

Overrides:

asDoubles in class REXP

asIntegers

public int[] asIntegers()

converts the values of this vector into integers by cast

Overrides:

asIntegers in class REXP

asStrings

public java.lang.String[] asStrings()

converts the values of this vector into strings

Overrides:

asStrings in class REXP

isNA

public boolean[] isNA()

returns a boolean vector of the same length as this vector with true for NA values and false for any other values (including NaNs)

Overrides:

isNA in class REXPVector

Returns:

a boolean vector of the same length as this vector with true for NA values and false for any other values

toDebugString

public java.lang.String toDebugString()

Description copied from class: REXP

returns representation that it useful for debugging (e.g. it includes attributes and may include vector values -- see REXP.maxDebugItems)

Overrides:

toDebugString in class REXPVector

Returns:

extended description of the obejct -- it may include vector values