dagR (version 1.1.1)

dag.letter: Write a DAG node symbol.

Description

Writes the node symbols, 'X' and 'Y' for exposure and outcome, 'C' and 'U' (with consecutive subscripts) for known and unknown covariables. Unknownness is identified by either node name 'unknown' or covariable type '2' in the DAG object.

Usage

dag.letter(dag, letter, x, y)

Arguments

dag

The DAG for which a node is to be written.

letter

The node that is of interest.

x

X position.

y

Y position.

See Also

dag.draw, dag.legend, write.paths

Examples

dag2a<-dag.adjust(demo.dag2(), 3);
dag.draw(dag2a, paths=FALSE);
dag.letter(dag2a,  1,  0.2, 1);
dag.letter(dag2a,  2, 0.25, 1);
dag.letter(dag2a,  3,  0.3, 1);
dag.letter(dag2a,  4, 0.35, 1);
dag.letter(dag2a, 13,  0.4, 1);