| // Copyright ©2015 The Gonum Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| package distmv |
| |
| const ( |
| badQuantile = "distmv: quantile not between 0 and 1" |
| badReceiver = "distmv: input slice is not nil or the correct length" |
| badSizeMismatch = "distmv: size mismatch" |
| badZeroDimension = "distmv: zero dimensional input" |
| nonPosDimension = "distmv: non-positive dimension input" |
| ) |
| |
| const logTwoPi = 1.8378770664093454835606594728112352797227949472755668 |
| |
| // useAs gets a slice of size n. If len(x) == n, x is returned, if len(x) == 0 |
| // then a slice is returned of length n. |
| func reuseAs(x []float64, n int) []float64 { |
| if len(x) == n { |
| return x |
| } |
| if len(x) == 0 { |
| if cap(x) >= n { |
| return x[:n] |
| } |
| return make([]float64, n) |
| } |
| panic(badReceiver) |
| } |
