R help - Aug 2013 - Coordinate scales for pairs plot

Greetings all.

I suspect this question has already been asked. Apologies
for not having taced it ...

In the default pairs plot produces by the function pairs(),
the coordinate scales alternate between top and bottom and
right and left sides.

For example, in a 5x5 plot for variables X1, X2, X3, X4, X5
the coordinate scales for X2, X4 appear beside rows 2 and 4
on the left, and the scales for X1, X3, X5 appear beside rows
1, 3, 5 on the right.

Similarly, the scales for X2 and X4 appear above columns 2 and 4,
and the scales for X1, X3, X5 appear below columns 1, 3, 5.

Is there a parameter lurking somewhere in the depths of this
function which can be set so that the scales for all the variables
X1,X2,X3,X4,X5 appear both above and below  columns 1,2,3,4,5;
and both to the left and to the right of rows 1,2,3,4,5?

With thanks,
Ted.

-------------------------------------------------
E-Mail: (Ted Harding) <Ted.Harding at wlandres.net>
Date: 21-Aug-2013  Time: 18:30:44
This message was sent by XFMail

On Aug 21, 2013, at 10:30 AM, (Ted Harding) wrote:
> Greetings all.
> 
> I suspect this question has already been asked. Apologies
> for not having taced it ...
> 
> In the default pairs plot produces by the function pairs(),
> the coordinate scales alternate between top and bottom and
> right and left sides.
> 
> For example, in a 5x5 plot for variables X1, X2, X3, X4, X5
> the coordinate scales for X2, X4 appear beside rows 2 and 4
> on the left, and the scales for X1, X3, X5 appear beside rows
> 1, 3, 5 on the right.
> 
> Similarly, the scales for X2 and X4 appear above columns 2 and 4,
> and the scales for X1, X3, X5 appear below columns 1, 3, 5.
> 
> Is there a parameter lurking somewhere in the depths of this
> function which can be set so that the scales for all the variables
> X1,X2,X3,X4,X5 appear both above and below  columns 1,2,3,4,5;
> and both to the left and to the right of rows 1,2,3,4,5?
I've searched for a parameter and come up empty; Hacking the code for
pairs.default is not that difficult. I stripped out the conditionals that were
driving the Axis calls to alternating "sides":
Search for `box()` to start this surgery and replace everything to the
'mfg' assignment to get uniform axis locations on sides 1 and 2.

pairs.12 <- function(x, ... arglist same as pairs.default)
   {....upper portion of code
    box()
            if (i == nc ) 
                localAxis(1L , x[, j], x[, i], 
                  ...)
            if (j == 1 ) 
                localAxis(2L, x[, j], x[, i], ...)

    mfg <- par("mfg")
   lower portion of code ....}

Oooops,  that wasn't what you asked for ... Use this instead:

........
box()  # begin surgery
            if (i == 1 ) 
                localAxis(3, x[, j], x[, i],  ...)
            if (i == nc ) 
                localAxis(1, x[, j], x[, i],  ...)
            if (j == 1 ) 
                localAxis(2L, x[, j], x[, i], ...)
            if (j == nc ) 
                localAxis(4L, x[, j], x[, i], ...)
        # end anastomosis
 mfg <- par("mfg")
..........
--
David Winsemius
Alameda, CA, USA