Trigonometric Functions (Fast Parallel Version)

Fast version of trigonometric functions (when vector size >= 50000). They respectively compute the cosine, sine, tangent, arc-cosine, arc-sine, arc-tangent, and the two-argument arc-tangent.

cospi_(x), sinpi_(x), and tanpi_(x), compute cos(pi*x), sin(pi*x), and tan(pi*x).

cos_(x, para = 50000L)

sin_(x, para = 50000L)

tan_(x, para = 50000L)

acos_(x, para = 50000L)

asin_(x, para = 50000L)

atan_(x, para = 50000L)

cospi_(x, para = 50000L)

sinpi_(x, para = 50000L)

tanpi_(x, para = 50000L)

Arguments

x

vector of numeric values

para

the minimum length of x to use parallel computation (50000 by default)

Value

A numeric vector, matrix, or data frame with the transformed values.

Details

They are not generic functions and do not process factor, Date, POSIXt, difftime, complex, or S4 objects (use base R equivalent function instead). Data frames are processed column-wise, providing each column is compatible. All attributes are preserved.

See also

cos(), sin(), tan(), acos(), asin(), atan(), atan2()

Examples

cos_(1:5)
#> [1]  0.5403023 -0.4161468 -0.9899925 -0.6536436  0.2836622