inst/examples/decimal_truth.R

In tinycodet: Functions to Help in your Coding Etiquette

x <- c(0.3, 0.6, 0.7)
y <- c(0.1 * 3, 0.1 * 6, 0.1 * 7)
print(x)
print(y)

x == y # gives FALSE, but should be TRUE
x != y # gives TRUE, should be FALSE
x > y # not wrong
x < y # gives TRUE, should be FALSE

# same as above, but here the results are correct:
x %d==% y # correct
x %d!=% y # correct
x %d<% y # correct
x %d>% y # correct
x %d<=% y # correct
x %d>=% y # correct

# check if numbers are in closed interval:
x <- c(0.3, 0.6, 0.7)
bnd <- cbind(x - 0.1, x + 0.1)
x %d{}% bnd
x %d!{}% bnd

# These operators work for integers also:
x <- 1L:5L
y <- 1L:5L
x %d==% y
x %d!=% y
x %d<% y
x %d>% y
x %d<=% y
x %d>=% y

x <- 1L:5L
y <- x + 1L
x %d==% y
x %d!=% y
x %d<% y
x %d>% y
x %d<=% y
x %d>=% y

x <- 1L:5L
y <- x - 1L
x %d==% y
x %d!=% y
x %d<% y
x %d>% y
x %d<=% y
x %d>=% y

# is_wholenumber:
is_wholenumber(1:10 + c(0, 0.1))