Global projection options for structr

Plotting defaults for stereographic/equal-area projections. For example, structr.earea and structr.upper.hem control the default hemisphere projection used across plotting and labeling functions (stereoplot(), plot.Vec3(), text.spherical(), ...).

Set them with options() to change the default for an entire session; any function argument passed explicitly overrides the global default for that call.

structr.earea: Logical. Equal-area (TRUE, default) vs. equal-angle (FALSE) projection.
structr.upper.hem: Logical. Upper (TRUE) vs. lower hemisphere (FALSE, default).
structr.guides: Logical. logical. Whether guides should be added to the plot (TRUE by default).
structr.d: integer. Angle distance between guides. Default: 10
structr.col: Color of guide lines. "gray90" by default.
structr.lwd: Width of guide lines. 0.5 by default.
structr.lty: Type of guide lines. 1 by default.
structr.border.col: Color of primitive circle (frame), center-cross and ticks of the stereo plot. "black" by default.
structr.centercross: Logical. Whether a center cross should be added (TRUE by default).
structr.ticks: Integer. Angle between ticks. if NULL (the default), no ticks are drawn.
structr.origin.text: character. Text at origin of plot. "N" by default.
structr.labels: this can either be a logical value specifying whether (numerical) annotations are to be made next to the tick marks, or a character or expression
structr.ladj: adjustment for all labels away from origin of projection circle. This essentially an amount that is added to radius and the length of the ticks.
structr.radius: Numeric. Radius of the projection circle. 1 by default.
structr.tol: Numeric. Tolerance for calculations, i.e. smallest relative difference between two numbers the computer can recognize. Default is sqrt(.Machine$double.eps)

Examples

old <- options(structr.upper.hem = TRUE)
# ... plotting calls now default to upper hemisphere
options(old)  # restore

See also

Examples