access_data()

Datafile dependents lookup or interpolation function

Syntax
access_data(AccessType, DataSetVar, Ivar1, IValue1, Ivar2, Ivalue2, ...)

Arguments

Examples

In this example, it is assumed that the dataset spar.ds contains S-parameters at two frequencies, 1 and 2 GHz.
dsS11 = dsexpr("S(1,1)", "spar.ds")
returns the S(1,1) dataset variable
adV0 = access_data("linear", dsS11, "freq", 1.5 GHz)
returns linearly interpolated S11 at 1.5 GHz
adV3 = access_data(3, dsS11, "freq", 1)
returns S11 at 2 GHz
adV4 = access_data(4, dsS11, "freq", 1 GHz)
returns S11 at 1 GHz
adV5 = access_data(5, dsS11, "freq", 1.9 GHz)
returns S11at 2 GHz
adV6 = access_data(6, dsS11, "freq", 1.1 GHz)
returns S11at 1 GHz

See Also

dsexpr()

Notes/Equations

The access_data() function is used to access the dependent data of a specific type from a dataset. The accessed data can then be used in the design as a parameter value or in other simulation expressions. The data can be accessed either by interpolation or lookup. The access type choices are:

Access Type	Description
0 or linear	access data by linear interpolation
1 or spline	access data by spline interpolation
2 or cubic	access data by cubic interpolation
3 or index_lookup	access data by index value truncation, average of end indices if midway
4 or value_lookup	access data by value - nearest value, average of end points if midway
5 or ceil_value_lookup	access data by nearest value not less than given value, except maximum of value for value greater than maximum value
6 or floor_value_lookup	access data by nearest value not greater than given value, except minimum of value for value less than minimum value