| xy.group {Hmisc} | R Documentation |
Compute mean x vs. a function of y (e.g. median) by quantile groups of x or by x grouped to have a given average number of observations. Deletes NAs in x and y before doing computations.
xy.group(x, y, m=150, g, fun=mean, result="list")
x |
a vector, may contain NAs |
y |
a vector of same length as x, may contain NAs |
m |
number of observations per group |
g |
number of quantile groups |
fun |
function of y such as median or mean (the default) |
result |
"list" (the default), or "matrix" |
if result="list", a list with components x and y suitable for plotting. if result="matrix", matrix with rows corresponding to x-groups and columns named n, x, and y.
# plot(xy.group(x, y, g=10)) #Plot mean y by deciles of x # xy.group(x, y, m=100, result="matrix") #Print table, 100 obs/group