 Name  Description 

 AbsInPlace 
Computes the absolute values of the elements of a vector inplace.
(Inherited from VectorT.) 
 AbsoluteMaxIndex 
Returns the index of the component in this
ComposedComplexVectorT that has the largest absolute
value.
(Overrides VectorTAbsoluteMaxIndex.) 
 AbsoluteMinIndex 
Returns the index of the component in this
ComposedComplexVectorT that has the smallest absolute
value.
(Overrides VectorTAbsoluteMinIndex.) 
 AcoshInPlace 
Computes the inverse hyperbolic cosine of the elements of a vector inplace.
(Inherited from VectorT.) 
 AcosInPlace 
Computes the inverse cosine of the elements of a vector inplace.
(Inherited from VectorT.) 
 Add(VectorT)  Obsolete.
Adds another vector to this vector.
(Inherited from VectorT.) 
 AddInPlace(T) 
Adds a constant to a vector.
(Inherited from VectorT.) 
 AddInPlace(VectorT) 
Adds another vector to this vector inplace.
(Inherited from VectorT.) 
 AddProductInPlace(LinearOperatorT, VectorT)  (Inherited from VectorT.) 
 AddProductInPlace(LinearOperatorT, TransposeOperation, VectorT)  (Inherited from VectorT.) 
 AddScaledInPlace 
Adds a scaled vector to this vector.
(Inherited from VectorT.) 
 AddScaledProductInPlace(T, LinearOperatorT, VectorT)  (Inherited from VectorT.) 
 AddScaledProductInPlace(T, LinearOperatorT, TransposeOperation, VectorT) 
Adds the scaled product of a matrix and a vector inplace to a vector.
(Inherited from VectorT.) 
 Aggregate(TypePreservingAggregatorGroup) 
Applies the specified aggregator to the vector.
(Inherited from VectorT.) 
 AggregateU(AggregatorT, U) 
Applies the specified aggregator to the vector.
(Inherited from VectorT.) 
 AggregateU(AggregatorGroupU) 
Applies the specified aggregator to the vector.
(Inherited from VectorT.) 
 AggregateBy(IGrouping, TypePreservingAggregatorGroup) 
Returns a new vector that aggregates the columns according to the specified grouping.
(Inherited from VectorT.) 
 AggregateByU(IGrouping, AggregatorT, U) 
Aggregates the vector according to the specified grouping.
(Inherited from VectorT.) 
 AggregateByU(IGrouping, AggregatorGroupU) 
Returns a new vector that aggregates the columns according to the specified grouping.
(Inherited from VectorT.) 
 AggregateByU(IPivot, AggregatorT, U) 
Returns a new matrix that aggregates the elements according to the specified pivot grouping.
(Inherited from VectorT.) 
 AggregateByU(IPivot, AggregatorGroupU) 
Returns a new matrix that aggregates the elements according to the specified pivot grouping.
(Inherited from VectorT.) 
 All 
Returns whether all the elements of the vector
satisfy a condition.
(Inherited from VectorT.) 
 Any 
Returns whether any of the elements of the vector
satisfy a condition.
(Inherited from VectorT.) 
 AsCategorical(IndexT) 
Returns a categorical vector containing the same data as this vector.
(Inherited from VectorT.) 
 AsCategorical(SortOrder) 
Returns a categorical vector containing the same data as this vector.
(Inherited from VectorT.) 
 AsDenseVector 
Returns this vector as a dense vector.
(Inherited from VectorT.) 
 AsIndex 
Converts a vector to an index.
(Inherited from VectorT.) 
 AsinhInPlace 
Computes the inverse hyperbolic sine of the elements of a vector inplace.
(Inherited from VectorT.) 
 AsinInPlace 
Computes the inverse sine of the elements of a vector inplace.
(Inherited from VectorT.) 
 AtanhInPlace 
Computes the inverse hyperbolic tangent of the elements of a vector inplace.
(Inherited from VectorT.) 
 AtanInPlace 
Computes the inverse tangent of the elements of a vector inplace.
(Inherited from VectorT.) 
 Broadcast 
Broadcasts the elements of the vector along the specified dimension.
(Inherited from VectorT.) 
 BroadcastInto 
Broadcasts the elements of the vector along the specified dimension.
(Inherited from VectorT.) 
 ByK 
Enables accessing elements of an indexed vector using strongly typed indexes.
(Inherited from VectorT.) 
 CastU 
Casts the elements of the vector to the specified type.
(Inherited from VectorT.) 
 CastIntoU 
Casts the elements of the vector to the specified type.
(Inherited from VectorT.) 
 CeilingInPlace 
Computes the smallest integers greater than the elements of a vector inplace.
(Inherited from VectorT.) 
 Clone 
Makes a copy of this vector.
(Inherited from VectorT.) 
 Clone(CloningMethod) 
Makes a copy of this complex vector using the specified
method.
(Overrides VectorTClone(CloningMethod).) 
 CloneData 
Gives this instance its own copy of its elements.
(Overrides VectorTCloneData.) 
 Conjugate 
Conjugates the elements of a vector and returns the result.
(Inherited from VectorT.) 
 ConjugateDotProduct 
Returns the dot product of this vector with another
vector.
(Inherited from VectorT.) 
 ConjugateInPlace 
Changes the elements of the vector to their complex conjugate.
(Overrides VectorTConjugateInPlace.) 
 CopyTo(ArraySliceT) 
Copies the elements of this vector
to an array.
(Inherited from VectorT.) 
 CopyTo(IVector) 
Copies the elements of this vector
to an untyped vector.
(Inherited from VectorT.) 
 CopyTo(T) 
Copies the elements of this vector
to an array.
(Inherited from VectorT.) 
 CopyTo(VectorT) 
Copies the elements of this vector
to another vector.
(Inherited from VectorT.) 
 CopyTo(T, Int32) 
Copies the elements of this vector
to an array.
(Inherited from VectorT.) 
 CopyTo(VectorT, Int32) 
Copies the elements of this vector
to another vector starting at the specified position.
(Inherited from VectorT.) 
 CopyToOrClone 
Copies the elements of this vector to another vector, if it exists;
otherwise clones the vector using the specified method.
(Inherited from VectorT.) 
 CoshInPlace 
Computes the hyperbolic cosine of the elements of a vector inplace.
(Inherited from VectorT.) 
 CosInPlace 
Computes the cosine of the elements of a vector inplace.
(Inherited from VectorT.) 
 CumulativeProduct 
Gets the product of the elements of the vector.
(Inherited from VectorT.) 
 CumulativeProductInPlace 
Gets the product of the elements of the vector.
(Inherited from VectorT.) 
 CumulativeProductInto 
Gets the product of the elements of the vector.
(Inherited from VectorT.) 
 CumulativeSum 
Gets the sum of the elements of the vector.
(Inherited from VectorT.) 
 CumulativeSumInPlace 
Gets the sum of the elements of the vector.
(Inherited from VectorT.) 
 CumulativeSumInto 
Gets the cumulative sum of the elements of the vector.
(Inherited from VectorT.) 
 Dispose 
Releases unmanaged resources.
(Inherited from VectorT.) 
 DivideInPlace 
Divides a vector inplace by a constant.
(Inherited from VectorT.) 
 DotProduct 
Returns the dot product of this vector with another
vector.
(Inherited from VectorT.) 
 ElementwiseDivideInPlace 
Divides this vector inplace elementwise by another vector.
(Inherited from VectorT.) 
 ElementwiseMultiplyInPlace 
Multiplies this vector inplace elementwise by another vector.
(Inherited from VectorT.) 
 ElementwisePowInPlace(Int32) 
Raises the elements of a vector inplace to a constant power.
(Inherited from VectorT.) 
 ElementwisePowInPlace(T) 
Raises the elements of a vector inplace to a constant power.
(Inherited from VectorT.) 
 ElementwisePowInPlace(VectorT) 
Raises this vector inplace elementwise by another vector.
(Inherited from VectorT.) 
 EnsureWritable 
Ensures that every element in the vector can be written to.
(Inherited from VectorT.) 
 EnsureWritable(Int32) 
Ensures that the element at the specified index in the vector can be written to.
(Inherited from VectorT.) 
 EnsureWritable(Range) 
Ensures that the element at the specified index in the vector can be written to.
(Inherited from VectorT.) 
 EnsureWritable(Int32, Int32) 
Ensures that the element at the specified index in the vector can be written to.
(Inherited from VectorT.) 
 Equals(Object) 
Determines whether the specified Object
is equal to the current VectorT.
(Inherited from VectorT.) 
 Equals(VectorT) 
Determines whether the specified VectorT
is equal to the current VectorT.
(Inherited from VectorT.) 
 Equals(Object, IEqualityComparer) 
Returns whether an object is structurally equal to this instance.
(Inherited from VectorT.) 
 ExpInPlace 
Computes the exponential of the elements of a vector inplace.
(Inherited from VectorT.) 
 Find 
Enumerates the indexes that match a condition.
(Inherited from VectorT.) 
 FloorInPlace 
Computes the largest integers smaller than the elements of a vector inplace.
(Inherited from VectorT.) 
 GetK(K) 
Gets the value with the specified key.
(Inherited from VectorT.) 
 GetK1, K2(K1, K2) 
Gets the value at the specified key.
(Inherited from VectorT.) 
 GetEnumerator  (Inherited from VectorT.) 
 GetHashCode 
Returns the hash code for this instance.
(Inherited from VectorT.) 
 GetHashCode(IEqualityComparer) 
Returns a hash code for this instance.
(Inherited from VectorT.) 
 GetImaginaryPart 
Returns a real vector containing the imaginary elements of the vector.

 GetNearestK 
Gets the value nearest to the specified key.
(Inherited from VectorT.) 
 GetNearestValuesK 
Returns a vector containing the items nearest to the specified key values.
(Inherited from VectorT.) 
 GetObjectData  (Overrides VectorTGetObjectData(SerializationInfo, StreamingContext).) 
 GetRealPart 
Returns a real vector containing the real elements of the vector.

 GetSlice(Int32) 
Returns a vector whose elements are a subset of the elements of
this instance
(Inherited from VectorT.) 
 GetSlice(Range) 
Returns a vector whose elements are a subset of the elements of
this instance
(Inherited from VectorT.) 
 GetSlice(Int32, Int32) 
Returns a vector whose elements are a subset of the elements of
this instance
(Inherited from VectorT.) 
 GetSlice(Range, Intent) 
Returns a vector whose elements are a subset of the elements of
this instance
(Inherited from VectorT.) 
 GetSlice(Slice, Intent) 
Returns a vector whose elements are a subset of the elements of
this instance.
(Inherited from VectorT.) 
 GetSlice(Int32, Int32, Intent) 
Returns a vector whose elements are a subset of the elements of
this instance
(Inherited from VectorT.) 
 GetSlice(Int32, Int32, Int32) 
Returns a vector whose elements are a subset of the elements of
this instance
(Inherited from VectorT.) 
 GetSlice(Int32, Int32, Int32, Intent) 
Returns a vector whose elements are a subset of the elements of
this instance.
(Inherited from VectorT.) 
 GetSubvector(Int32)  Obsolete.
Returns a vector whose elements are a subset of the elements of
this instance
(Inherited from VectorT.) 
 GetSubvector(Range)  Obsolete.
Returns a vector whose elements are a subset of the elements of
this instance
(Inherited from VectorT.) 
 GetSubvector(Int32, Int32)  Obsolete.
Returns a vector whose elements are a subset of the elements of
this instance
(Inherited from VectorT.) 
 GetSubvector(Range, Intent)  Obsolete.
Returns a vector whose elements are a subset of the elements of
this instance
(Inherited from VectorT.) 
 GetSubvector(Slice, Intent)  Obsolete.
Returns a vector whose elements are a subset of the elements of
this instance.
(Inherited from VectorT.) 
 GetSubvector(Int32, Int32, Intent)  Obsolete.
Returns a vector whose elements are a subset of the elements of
this instance
(Inherited from VectorT.) 
 GetSubvector(Int32, Int32, Int32)  Obsolete.
Returns a vector whose elements are a subset of the elements of
this instance
(Inherited from VectorT.) 
 GetSubvector(Int32, Int32, Int32, Intent)  Obsolete.
Returns a vector whose elements are a subset of the elements of
this instance.
(Inherited from VectorT.) 
 GetType  Gets the Type of the current instance. (Inherited from Object.) 
 GetValue(Int32) 
Gets the vector element at the specified position.
(Overrides VectorTGetValue(Int32).) 
 GetValue(Int32) 
Gets the vector element at the specified position.
(Inherited from VectorT.) 
 GetValues(Subset, Intent) 
Returns a vector that contains the specified subset
of elements of the vector.
(Inherited from VectorT.) 
 GetValues(Int32, Boolean, Intent) 
Returns a new vector that contains the elements of the vector with the specified indexes.
(Inherited from VectorT.) 
 GetValuesK(IEnumerableK) 
Returns a vector containing the items at the specified key values.
(Inherited from VectorT.) 
 IsElementWritable 
Gets a value indicating whether the value of the component at
the specified index can be changed.
(Overrides VectorTIsElementWritable(Int32).) 
 IsMissing 
Returns whether the value at the specified index is missing.
(Inherited from VectorT.) 
 KeysAndValuesK 
Enumerates all keys and associated values.
(Inherited from VectorT.) 
 Log10InPlace 
Computes the logarithm of the elements of a vector inplace.
(Inherited from VectorT.) 
 LogInPlace 
Computes the logarithm of the elements of a vector inplace.
(Inherited from VectorT.) 
 LogInPlace(T) 
Computes the logarithm of the elements of a vector inplace.
(Inherited from VectorT.) 
 MakeImmutable 
Protects the vector from changes in values or structure.
(Inherited from VectorT.) 
 MapU(FuncT, U) 
Applies a function to the elements of a vector and returns the result.
(Inherited from VectorT.) 
 MapInPlace(FuncT, T) 
Applies a function inplace to the elements of a vector.
(Inherited from VectorT.) 
 MapInPlace(FuncInt32, T, T) 
Applies a function inplace to the elements of a vector.
(Inherited from VectorT.) 
 MapInPlaceU(FuncT, U, T, VectorU) 
Applies a function to the elements of a vector.
(Inherited from VectorT.) 
 MapIntoU(FuncT, U, VectorU) 
Applies a function to the elements of a vector.
(Inherited from VectorT.) 
 MapIntoU(FuncInt32, T, U, VectorU) 
Applies a function to the elements of a vector.
(Inherited from VectorT.) 
 MapWhereU(FuncT, Boolean, FuncT, U) 
Applies a function to the elements of a vector that meet a condition and returns the result.
(Inherited from VectorT.) 
 MapWhereU(FuncInt32, T, Boolean, FuncT, U) 
Applies a function to the elements of a vector that meet a condition and returns the result.
(Inherited from VectorT.) 
 Max 
Returns the value of the largest element in this
vector.
(Inherited from VectorT.) 
 Max(Int32) 
Returns the value of the largest element in this
vector.
(Inherited from VectorT.) 
 MaxIndex 
Returns the index of the largest element in this
vector.
(Inherited from VectorT.) 
 MaxInPlace 
Returns a vector whose elements are the maximum of the components of a vector
and a real number.
(Inherited from VectorT.) 
 Min 
Returns the value of the smallest element in this
vector.
(Inherited from VectorT.) 
 Min(Int32) 
Returns the value of the smallest element in this
vector.
(Inherited from VectorT.) 
 MinIndex 
Returns the index of the smallest element in this
vector.
(Inherited from VectorT.) 
 MinInPlace 
Returns a vector whose elements are the minimum of the components of a vector
and a real number.
(Inherited from VectorT.) 
 MultiplyInPlace(ComplexT) 
Multiplies a vector by a given factor.
(Overrides VectorTMultiplyInPlace(T).) 
 MultiplyInPlace(MatrixT, MatrixOperationSide)  (Inherited from VectorT.) 
 NegateInPlace 
Negates a vector inplace.
(Inherited from VectorT.) 
 Norm 
Returns the twonorm of the vector.
(Inherited from VectorT.) 
 Norm(Int32) 
Returns the norm of the specified order of this
vector.
(Inherited from VectorT.) 
 Norm(T) 
Returns the norm of the specified order of this
vector.
(Inherited from VectorT.) 
 Normalize 
Scales the vector to make its
twonorm equal to one.
(Inherited from VectorT.) 
 NormSquared 
Returns the square of the twonorm of this vector.
(Inherited from VectorT.) 
 OneNorm 
Returns the onenorm of this vector.
(Inherited from VectorT.) 
 PermuteInPlace(Permutation) 
Permutes a vector.
(Inherited from VectorT.) 
 PermuteInPlace(Permutation, Boolean) 
Permutes a vector.
(Inherited from VectorT.) 
 Product 
Gets the product of the elements of the vector.
(Inherited from VectorT.) 
 Protect 
Returns a readonly copy of the vector.
(Inherited from VectorT.) 
 ProtectInPlace 
Protects the vector from changes in values or structure.
(Inherited from VectorT.) 
 ReciprocalInPlace 
Computes the inverses (reciprocals) of the elements of a vector inplace.
(Inherited from VectorT.) 
 RemoveMissingValues 
Removes all the missing values from a vector and returns the result.
(Inherited from VectorT.) 
 ReplaceMissingValues(T) 
Replaces all missing values in the vector with the specified value.
(Inherited from VectorT.) 
 ReplaceMissingValues(VectorT) 
Replaces all missing values in the vector with the
corresponding element in another vector.
(Inherited from VectorT.) 
 ReplaceMissingValues(Direction, Int32) 
Replaces all missing values in a vector with the specified value.
(Inherited from VectorT.) 
 ReplaceMissingValuesInPlace(T) 
Replaces all missing values in the vector with the specified value inplace.
(Inherited from VectorT.) 
 ReplaceMissingValuesInPlace(VectorT) 
Replaces all missing values in the vector with the
corresponding element in another vector
inplace.
(Inherited from VectorT.) 
 ReplaceMissingValuesInPlace(Direction, Int32) 
Replaces all missing values in a vector with the specified value inplace.
(Inherited from VectorT.) 
 ReplaceMissingValuesInto(T, VectorT) 
Replaces all missing values in a vector with the specified value.
(Inherited from VectorT.) 
 ReplaceMissingValuesInto(VectorT, VectorT) 
Replaces all missing values in the vector with the
corresponding element in another vector.
(Inherited from VectorT.) 
 ReplaceMissingValuesInto(Direction, VectorT, Int32) 
Replaces all missing values in a vector with
the previous or next nonmissing value.
(Inherited from VectorT.) 
 ReplaceValue 
Replaces every occurrence of a value with a new value.
(Inherited from VectorT.) 
 ReplaceValueInPlace 
Replaces every occurrence of a value with a new value.
(Inherited from VectorT.) 
 ReplaceValueInto 
Replaces every occurrence of a value with a new value.
(Inherited from VectorT.) 
 Resample(Recurrence, Direction, TypePreservingAggregatorGroup) 
Returns a new vector that resamples the values in the vector using the specified
recurrence pattern and aggregator.
(Inherited from VectorT.) 
 ResampleR(IndexR, Direction, TypePreservingAggregatorGroup) 
Returns a new vector that resamples the values in the vector using the specified
index and aggregator.
(Inherited from VectorT.) 
 ResampleU(Recurrence, Direction, AggregatorGroupU) 
Returns a new vector that resamples the values in the vector using the specified
recurrence pattern and aggregator.
(Inherited from VectorT.) 
 ResampleR, U(IndexR, Direction, AggregatorGroupU) 
Returns a new vector that resamples the values in the vector using the specified
index and aggregator.
(Inherited from VectorT.) 
 Reshape 
Returns a matrix that contains the vector elements columnwise.
(Inherited from VectorT.) 
 SetMissing 
Declares that the value at the specified index is missing.
(Inherited from VectorT.) 
 SetToZero 
Sets all the elements of the vector to 0.
(Inherited from VectorT.) 
 SetValue(ComplexT) 
Sets all the components of the ComposedComplexVectorT to
the specified value.
(Overrides VectorTSetValue(T).) 
 SetValue(ComplexT, Int32) 
Sets the vector element at the specified position to the specified value.
(Overrides VectorTSetValue(T, Int32).) 
 SetValue(T, Int32) 
Sets the vector element at the specified position to the specified value.
(Inherited from VectorT.) 
 SetValues(T, Range) 
Sets a range of elements of the vector to the specified value.
(Inherited from VectorT.) 
 SetValues(T, VectorBoolean) 
Sets the elements of a vector that match the specified condition
to the specified value.
(Inherited from VectorT.) 
 SetValues(T, FuncT, Boolean) 
Sets all the elements that meet a condition to
the specified value.
(Inherited from VectorT.) 
 ShallowCopy 
Makes a shallow copy of this vector.
(Inherited from VectorT.) 
 SinhInPlace 
Computes the hyperbolic sine of the elements of a vector inplace.
(Inherited from VectorT.) 
 SinInPlace 
Computes the sine of the elements of a vector inplace.
(Inherited from VectorT.) 
 SortInPlace 
Sorts the vector in ascending order.
(Inherited from VectorT.) 
 SortInPlace(SortOrder) 
Sorts the vector in the specified order.
(Inherited from VectorT.) 
 SortInPlace(SortOrder, Permutation) 
Sorts the vector in the specified order.
(Inherited from VectorT.) 
 SqrtInPlace 
Computes the square root of the elements of a vector inplace.
(Inherited from VectorT.) 
 Subtract  Obsolete. (Inherited from VectorT.) 
 SubtractInPlace(T) 
Subtracts a constant value from the elements of this vector inplace.
(Inherited from VectorT.) 
 SubtractInPlace(VectorT) 
Subtracts another vector from this vector inplace.
(Inherited from VectorT.) 
 SubtractProductInPlace  (Inherited from VectorT.) 
 Sum 
Gets the sum of the elements of the vector.
(Inherited from VectorT.) 
 Summarize 
Returns a summary of the contents of the matrix using the default summary options.
(Inherited from VectorT.) 
 Summarize(SummaryOptions) 
Returns a summary of the contents of the matrix using the specified options.
(Inherited from VectorT.) 
 SwapElements 
Exchanges two elements of the vector.
(Inherited from VectorT.) 
 TanhInPlace 
Computes the hyperbolic tangent of the elements of a vector inplace.
(Inherited from VectorT.) 
 TanInPlace 
Computes the tangent of the elements of a vector inplace.
(Inherited from VectorT.) 
 ToArray 
Gets the elements of the vector.
(Inherited from VectorT.) 
 ToColumnMatrix 
Creates a matrix with the vector as its only column..
(Inherited from VectorT.) 
 ToDataFrameC(C) 
Returns a data frame with the current vector as its only column.
(Inherited from VectorT.) 
 ToDataFrameR, C(IndexR, C) 
Returns a data frame with the current vector as its only column.
(Inherited from VectorT.) 
 ToDenseVector 
Makes a copy of this instance and returns it as a
dense vector.
(Inherited from VectorT.) 
 Top 
Returns a vector containing the specified number of elements
from the top of the sorted vector.
(Inherited from VectorT.) 
 ToRowMatrix 
Creates a matrix with the vector as its only column..
(Inherited from VectorT.) 
 ToSparseVector  (Inherited from VectorT.) 
 ToString  Returns a string that represents the current object. (Inherited from VectorT.) 
 ToString(String) 
Converts the numeric value of this vector instance
to its equivalent string representation, using the
specified format.
(Inherited from VectorT.) 
 ToString(String, IFormatProvider) 
Returns a String representation of this vector.
(Inherited from VectorT.) 
 TryCastU 
Attempts to convert the elements of the vector to the specified type.
(Inherited from VectorT.) 
 TryEnsureWritable 
Ensures that every element in the vector can be written to.
(Overrides VectorTTryEnsureWritable.) 
 TryEnsureWritable(Int32) 
Ensures that the element at the specified index in the vector can be written to.
(Overrides VectorTTryEnsureWritable(Int32).) 
 TryEnsureWritable(Int32, Int32) 
Ensures that the element at the specified index in the vector can be written to.
(Overrides VectorTTryEnsureWritable(Int32, Int32).) 
 TryGetK 
Attempts to get the value with the specified key.
(Inherited from VectorT.) 
 UnstackR, C 
Returns a data frame that contains the values in the vector
arranged according to the levels in a hierarchical index.
(Inherited from VectorT.) 
 WeightedNorm 
Returns the weighted twonorm of the vector.
(Inherited from VectorT.) 
 WeightedNormSquared 
Returns the square of the weighted twonorm of the vector.
(Inherited from VectorT.) 
 WindowU(Int32, AggregatorGroupU) 
Returns a new vector that aggregates the values in a sliding window
of the specified size.
(Inherited from VectorT.) 
 WindowU(Int32, Int32, Boolean, AggregatorGroupU) 
Returns a new vector that aggregates the values in a sliding window
of the specified size.
(Inherited from VectorT.) 
 WithNameC 
Sets the name of a vector to the specified value.
(Inherited from VectorT.) 