Select columns names matching certain critera
This function allows easy selection of the column names of an object using a set of inclusion and exclusion critera.
matchcols(object, with, without, method=c("and","or"), ...)object |
Matrix or dataframe |
with, without |
Vector of regular expression patterns |
method |
One of "and" or "or" |
... |
Optional arguments to |
Vector of column names which match all (method="and") or any
(method="or") of the patterns specified in with, but
none of the patterns specified in without.
Gregory R. Warnes greg@warnes.net
# create a matrix with a lot of named columns
x <- matrix( ncol=30, nrow=5 )
colnames(x) <- c("AffyID","Overall Group Means: Control",
"Overall Group Means: Moderate",
"Overall Group Means: Marked",
"Overall Group Means: Severe",
"Overall Group StdDev: Control",
"Overall Group StdDev: Moderate",
"Overall Group StdDev: Marked",
"Overall Group StdDev: Severe",
"Overall Group CV: Control",
"Overall Group CV: Moderate",
"Overall Group CV: Marked",
"Overall Group CV: Severe",
"Overall Model P-value",
"Overall Model: (Intercept): Estimate",
"Overall Model: Moderate: Estimate",
"Overall Model: Marked: Estimate",
"Overall Model: Severe: Estimate",
"Overall Model: (Intercept): Std. Error",
"Overall Model: Moderate: Std. Error",
"Overall Model: Marked: Std. Error",
"Overall Model: Severe: Std. Error",
"Overall Model: (Intercept): t value",
"Overall Model: Moderate: t value",
"Overall Model: Marked: t value",
"Overall Model: Severe: t value",
"Overall Model: (Intercept): Pr(>|t|)",
"Overall Model: Moderate: Pr(>|t|)",
"Overall Model: Marked: Pr(>|t|)",
"Overall Model: Severe: Pr(>|t|)")
# Get the columns which give estimates or p-values
# only for marked and severe groups
matchcols(x, with=c("Pr", "Std. Error"),
without=c("Intercept","Moderate"),
method="or"
)
# Get just the column which give the p-value for the intercept
matchcols(x, with=c("Intercept", "Pr") )Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.