create_funct_1d_pairs — Create a function from a set of (x,y) pairs.
create_funct_1d_pairs creates a one-dimensional function
from a set of pairs of (x,y) values. The XValues of the
functions have to be passed in ascending order. The resulting
function can then be processed and analyzed with the operators for
1d functions.
The created function is composed like this:
where
denotes the function type as a one-dimensional function from a set of pairs and
are pairs of (x,y) values passed in XValues and YValues
with .
Alternatively, functions can be created with the operator
create_funct_1d_array. In contrast to this operator,
x values with arbitrary positions can be specified with
create_funct_1d_pairs. Hence, it is the more general
operator. It should be noted, however, that because of this
generality the processing of a function created with
create_funct_1d_pairs cannot be carried out as efficiently
as for equidistant functions. In particular, not all operators
accept such functions. If necessary, a function can be transformed
into an equidistant function with the operator
sample_funct_1d.
create_funct_1d_pairs examines whether the x values of type
'double' are ascending. Some other operators apply the same check but use
the type 'float' instead of 'double'. If such an operator is called as
successor, it might happen that two consecutive x values seem to be
equal for the 'float' variant, although they were ascending in the
'double' variant. If this happens, an error is thrown.
XValues (input_control) number(-array) → (real / integer)
X value for function points.
YValues (input_control) number(-array) → (real / integer)
Y value for function points.
Function (output_control) function_1d → (real / integer)
Created function.
write_funct_1d,
y_range_funct_1d,
get_pair_funct_1d
create_funct_1d_array,
read_funct_1d
Foundation