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

The RTableIsReal function tests if a rtable contains only real-valued numeric data. Data is scanned only for rtables with data_type = RTABLE_DAG.  When the data_type is RTABLE_COMPLEX or RTABLE_CXDAG, FALSE is immediately returned.  For all other data_types, TRUE is immediately returned.

The RTableCopyRealPart function creates a new rtable containing only the real part of complex numeric data in the rtable rt.  The new rtable has the settings in the supplied OpenMaple/VB/RTableSettings structure.

The RTableCopyImPart function creates a new rtable containing only the imaginary part of complex numeric data in the rtable rt.  The result is an ordinary rtable of numeric data.  If the specified data_type of rt is RTABLE_CXDAG or RTABLE_COMPLEX, the new rtable has 0s in the imaginary part, and the copied data in the real part. The new rtable has the settings in the supplied OpenMaple/VB/RTableSettings structure.

The RTableZipReIm function combines two real numeric rtables rt_re and rt_im into a complex rtable of the form rt_re + I*rt_im. Both rtables must be the same size.  The new rtable has the settings in the supplied OpenMaple/VB/RTableSettings structure, provided such settings allow for storage of complex data.