RTableCreate - Maple Help
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create an rtable in external code


Calling Sequence




Calling Sequence

RTableCreateDefault(kv, rts, zero, bounds)

RTableCreateDAG(kv, rts, pdata, bounds)

RTableCreateInteger8(kv, rts, pdata, bounds)

RTableCreateInteger16(kv, rts, pdata, bounds)

RTableCreateInteger32(kv, rts, pdata, bounds)

RTableCreateFloat32(kv, rts, pdata, bounds)

RTableCreateFloat64(kv, rts, pdata, bounds)

RTableCreateComplexDAG(kv, rts, pdata, bounds)

RTableCreateComplex64(kv, rts, pdata, bounds)




kernel handle returned by StartMaple



pointer to an RTableSettings structure



pointer to array data



array of lower and upper bounds



These functions are part of the OpenMaple interface to Microsoft Visual Basic.


The RTableCreate function creates a new rtable with the settings specified in rts.


When using RTableCreateDefault the pdata must be set to 0.  In this case a data block is allocated and initialized to rts.fill. When using the other RTableCreate functions, you must specify a previously created block of data. It is important that rts.foreign is set to TRUE. Size, storage, data_type, order, and indexing functions must all be considered when managing your data block.


The array, bounds is a list of the lower and upper bounds for each dimension of the rtable.  For example, a MxN Matrix has bounds[0] = 1; bounds[1] = M; bounds[2] = 1; bounds[3] = N.


The 2-D format of VB Arrays do not match the Maple rtable data-block memory layout, so pdata must be a pointer to a 1-D Array. 2-D can be achieved using a 1-D Array by simple arithmetic on the index.


Note: Matrix and Vector lower bounds must start at 1, not 0.


Public Sub TestRTableCreate(ByVal kv As Long)

    Dim rts As RTableSettings

    Dim rt As Long

    Dim bounds(4) As Long

    Dim data(16) As Long

    Dim n, i, j As Long

    ' fill in the settings

    RTableGetDefaults kv, rts

    rts.num_dimensions = 2

    rts.subtype = RTABLE_MATRIX

    rts.data_type = RTABLE_INTEGER32

    rts.foreign = True

    rts.order = RTABLE_FORTRAN

    n = 4

    bounds(0) = 1

    bounds(1) = n

    bounds(2) = 1

    bounds(3) = n

    ' create the rtable

    rt = RTableCreateInteger32(kv, rts, data(0), bounds(0))

    ' fill the diagonal with ones

    For i = 0 To n - 1

        data(n * i + i) = 1

    Next i

    MapleALGEB_Printf1 kv, "rtable = %a", rt

End Sub

See Also