count_vals_byname {matsbyname} | R Documentation |
Count the number of matrix entries that meet a criterion
Description
Expressions can be written in a natural way such as
count_vals_byname(m, "<=", 1)
.
Usage
count_vals_byname(
a,
compare_fun = c("==", "!=", "<", "<=", ">=", ">"),
val = 0
)
Arguments
a |
A matrix or list of matrices whose values are to be counted according to |
compare_fun |
The comparison function, one of "==", "!=", "<", "<=", ">", or ">=". Default is "==". |
val |
The value against which matrix entries are compared.
Default is |
Details
Either a single matrix or a list of matrices can be given as the a
argument.
compare_fun
can be specified as a string ("!=")
or as a back-quoted function (`!=`
).
Value
An integer indicating the number of entries in a
that meet the specified criterion
Examples
m <- matrix(c(0, 1, 2, 3, 4, 0), nrow = 3, ncol = 2)
count_vals_byname(m) # uses defaults: compare_fun = "==" and val = 0
count_vals_byname(m, compare_fun = "!=")
count_vals_byname(m, compare_fun = `!=`)
# Write expressions in a natural way
count_vals_byname(m, "<=", 1)
# Also works for lists
count_vals_byname(list(m,m), "<=", 1)
[Package matsbyname version 0.6.10 Index]