Operator Reference

HALCON Operator Reference / Control

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• Python
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• C

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assignassignAssignAssignassign (Operator)

assignassignAssignAssignassign — Assign a new value to a variable.

Signature

assign( : : Input : Result)

Herror assign(double Input, double* Result)

Herror T_assign(const Htuple Input, Htuple* Result)

void Assign(const HTuple& Input, HTuple* Result)

static void HOperatorSet.Assign(HTuple input, out HTuple result)

def assign(input: MaybeSequence[Union[int, float, str]]) -> Sequence[Union[int, float, str]]

def assign_s(input: MaybeSequence[Union[int, float, str]]) -> Union[int, float, str]

Description

assignassignAssignAssignassign assigns a new value to a variable.

In the full text editor, an assignment is simply entered with the help of the assignment operator :=, e.g.:

  u := sin(x) + cos(y)

This is equivalent to the C syntax assignment:

  u = sin(x) + cos(y);

If the operator window is used for entering an assignment, assign must be entered into the operator combo box as an operator name. This opens the parameter area, where the parameter InputInputInputinputinput represents the expression that has to be evaluated to one value and assigned to the variable, i.e., this is the right side of the assignment. The parameter ResultResultResultresultresult gets the name of the variable, i.e., this is the left side of assignment.

Attention

In addition to the parameter type control, which is indicated in the parameter description, assignassignAssignAssignassign also supports iconic variables and vector variables. For an assignment, the parameter types of the two parameters InputInputInputinputinput and ResultResultResultresultresult must be identical. For the assignment of iconic objects, the operator copy_objcopy_objCopyObjCopyObjcopy_obj is used internally.

Parameters

InputInputInputinputinput (input_control)  real(-array) → HTupleMaybeSequence[Union[int, float, str]]HTupleHtuple (real / integer / string) (double / int / long / string) (double / Hlong / HString) (double / Hlong / char*)

New value.

Default: 1

ResultResultResultresultresult (output_control)  real(-array) → HTupleSequence[Union[int, float, str]]HTupleHtuple (real / integer / string) (double / int / long / string) (double / Hlong / HString) (double / Hlong / char*)

Variable that has to be changed.

Example (HDevelop)

Tuple1 := [1,0,3,4,5,6,7,8,9]
Val := sin(1.2) + cos(1.2)
Tuple2 := []

Result

If the expression is correct assignassignAssignAssignassign returns 2 ( H_MSG_TRUE) . Otherwise, an exception is raised and an error code returned.

Alternatives

insertinsertInsertInsertinsert

Module

Foundation

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ClassesClasses | | Operators