matterkillo.blogg.se - Cdf control

Set this keyword to a named variable that will be set equal to the number of 512-byte cache buffers being used in the current MULTI_FILE format CDF and the zVariable indicated by the VARIABLE keyword.

2 = zMode is on in zMode/2, indicating that those dimensions with false variances (NOVARY) will be eliminated.įor Information about zModes, see “CDF Modes” in the CDF User’s Guide.

1 = zMode is on in zMode/1, indicating that the dimensionality and variances of the variables will stay the same.In a non-zero zMode, CDF rVariables are temporarily replaced with zVariables. Set this keyword to a named variable that will be set equal the zMode of the current CDF. IDL Prints: % CDF_CONTROL: Function completed but NO_PADVALUE_SPECIFIED: A pad value has not been specified. If a PADVALUE is not specified, CDF_CONTROL returns an error.įor example: fid = CDF_CREATE( 'test.cdf') varid = CDF_VARCREATE(fid, 'test') CDF_CONTROL, fid, GET_VAR_INFO=info, VARIABLE= 'test' The PADVALUE field will contain the value being used to fill locations that are not explicitly filled by the user. This value is -1 unless the current CDF is of SINGLE_FILE format, and the variable is a zVariable. The NINDEXRECORDS field will contain the number of index records for the current variable in the current CDF. The NINDEXENTRIES field will contain the number of index entries for the current variable in the current CDF. A value of -1 indicates that no records have been written. The MAXRECS field will contain the maximum record number (zero-based) of all variables of this type (rVariable or zVariable) in the current CDF.

For variables with a record variance of NOVARY, this will be at most zero. The MAXREC field will contain the maximum record number for the current variable. When these conditions are not met, the value is set to -1. Records can only be allocated for NOVARY zVariables in SINGLE_FILE format CDFs. The MAXALLOCREC field will contain the maximum record number (zero-based) allocated for the current variable. The EXTENDRECS field will contain the number of records by which the current variable will be extended whenever a new record needs to be added. SyntaxĬDF_CONTROL, Id [, SET_RVAR_CACHESIZE= value The CDF_CONTROL procedure allows you to obtain or set information for a Common Data Format file, its variables, and its attributes.