svymean.sqlsurvey {surveyNG} | R Documentation |
Horvitz-Thompson estimator of means and totals for a database-backed survey object. Computes cell proportions and counts for factor variables.
## S3 method for class 'sqlsurvey': svymean(x, design, na.rm = FALSE, byvar = NULL, se = FALSE, keep.estfun = FALSE, ...) ## S3 method for class 'sqlsurvey': svytotal(x, design, na.rm = FALSE, byvar = NULL, se = FALSE, keep.estfun = FALSE, ...)
x |
model formula |
design |
sqlsurvey object |
na.rm |
Remove missing values (treat as domain) |
byvar |
Formula with grouping variables |
se |
Compute variance-covariance matrix? |
keep.estfun |
Keep the SQL table of estimating functions after the standard errors are computed. |
... |
For future expansion |
A data frame with a column for each variable and a row for each group,
with the covariance matrix in the "var"
attribute.
sqclus1<-sqlsurvey(id="dnum", fpc="fpc", weights="pw", strata="fpc", data=system.file("apiclus1.db",package="surveyNG"), table.name="clus1", key="snum") sqclus1 svymean(~api99+stype, design=sqclus1) svytotal(~enroll+stype, design=subset(sqclus1, api99 > 500)) close(sqclus1)