tomogplot {MCMCpack} | R Documentation |
tomogplot is used to produce a tomography plot (see King, 1997) for a series of partially observed 2 x 2 contingency tables.
tomogplot(r0, r1, c0, c1, xlab="fraction of r0 in c0 (p0)", ylab="fraction of r1 in c0 (p1)", bgcol="white", ...)
r0 |
An (ntables * 1) vector of row sums from row 0. |
r1 |
An (ntables * 1) vector of row sums from row 1. |
c0 |
An (ntables * 1) vector of column sums from column 0. |
c1 |
An (ntables * 1) vector of column sums from column 1. |
xlab |
The x axis label for the plot. |
ylab |
The y axis label for the plot. |
bgcol |
The background color for the plot. |
... |
further arguments to be passed |
Consider the following partially observed 2 by 2 contingency table:
| Y=0 | | Y=1 | | | |
- - - - - | - - - - - | - - - - - | - - - - - |
X=0 | | Y0 | | | | r0 |
- - - - - | - - - - - | - - - - - | - - - - - |
X=1 | | Y1 | | | | r1 |
- - - - - | - - - - - | - - - - - | - - - - - |
| c0 | | c1 | | N |
where r0, r1, c0, c1, and N are non-negative integers that are observed. The interior cell entries are not observed. It is assumed that Y0|r0 ~ Binomial(r0, p0) and Y1|r1 ~ Binomial(r1,p1).
This function plots the bounds on the maximum likelihood estimatess for (p0, p1).
Gary King, 1997. A Solution to the Ecological Inference Problem. Princeton: Princeton University Press.
Jonathan Wakefield. 2001. ``Ecological Inference for 2 x 2 Tables,'' Center for Statistics and the Social Sciences Working Paper no. 12. University of Washington.
MCMChierEI
,
MCMCdynamicEI
, dtomogplot
r0 <- rpois(100, 500) r1 <- rpois(100, 200) c0 <- rpois(100, 100) c1 <- (r0 + r1) - c0 tomogplot(r0, r1, c0, c1)