Draw Axes With Side-Specific mgp Parameters

Description

mgp.axis is a version of axis that uses the appropriate side-specific mgp parameter (see par) to account for different space requirements for axis labels vertical vs. horizontal tick marks. mgp.axis also fixes a bug in axis(2,...) that causes it to assume las=1.

mgp.axis.labels is used so that different spacing between tick marks and axis tick mark labels may be specified for x- and y-axes. Use mgp.axis.labels('default') to set defaults. Users can set values manually using mgp.axis.labels(x,y) where x and y are 2nd value of par('mgp') to use. Use mgp.axis.labels(type=w) to retrieve values, where w='x', 'y', 'x and y', 'xy', to get 3 mgp values (first 3 types) or 2 mgp.axis.labels.

Usage

mgp.axis(side, at = NULL, ...,
         mgp = mgp.axis.labels(type = if (side == 1 | side == 3) "x"
                               else "y"),
         axistitle = NULL)

mgp.axis.labels(value,type=c('xy','x','y','x and y'))

Arguments

Value

mgp.axis.labels returns the value of mgp (only the second element of mgp if type="xy" or a list with elements x and y if type="x or y", each list element being a 3-vector) for the appropriate axis if value is not specified, otherwise it returns nothing but the system option mgp.axis.labels is set.
mgp.axis returns nothing.

Side Effects

mgp.axis.labels stores the value in the system option mgp.axis.labels

Author(s)

Frank Harrell

See Also

par

Examples

## Not run: 
mgp.axis.labels(type='x')  # get default value for x-axis
mgp.axis.labels(type='y')  # get value for y-axis
mgp.axis.labels(type='xy') # get 2nd element of both mgps
mgp.axis.labels(type='x and y')  # get a list with 2 elements
mgp.axis.labels(c(3,.5,0), type='x')  # set
options('mgp.axis.labels')            # retrieve

plot(..., axes=FALSE)
mgp.axis(1, "X Label")
mgp.axis(2, "Y Label")

## End(Not run)