我试图在下面的向量中找到两个接近于 10 的值。期望值是 10.12099196 和 10.63054170。我们将不胜感激。
[1] 0.98799517 1.09055728 1.20383713 1.32927166 1.46857509 1.62380423 1.79743107 1.99241551 2.21226576 2.46106916 2.74346924 3.06455219 3.42958354 3.84350238 4.31005838
[16] 4.83051356 5.40199462 6.01590035 6.65715769 7.30532785 7.93823621 8.53773241 9.09570538 9.61755743 10.12099196 10.63018180 11.16783243 11.74870531 12.37719092 13.04922392
[31] 13.75661322 14.49087793 15.24414627 16.00601247 16.75709565 17.46236358 18.06882072 18.51050094 18.71908344 18.63563523 18.22123225 17.46709279 16.40246292 15.09417699 13.63404124
[46] 12.11854915 10.63054170 9.22947285 7.95056000 6.80923943 5.80717982 4.93764782 4.18947450 3.54966795 3.00499094 2.54283599 2.15165780 1.82114213 1.54222565 1.30703661
[61] 1.10879707 0.94170986 0.80084308 0.68201911 0.58171175 0.49695298 0.42525021 0.36451350 0.31299262 0.26922281 0.23197860 0.20023468 0.17313291 0.14995459 0.13009730
[76] 0.11305559 0.09840485 0.08578789 0.07490387 0.06549894 0.05735864
最佳答案
如果不使用sort，我想不出办法。但是，您可以使用 部分排序 来加快速度。
x[abs(x-10) %in% sort(abs(x-10), partial=1:2)[1:2]]
# [1] 9.617557 10.120992
如果相同的值出现不止一次，您将在此处获取所有值。因此，您可以用 unique 包装它，也可以使用 match 代替，如下所示:
x[match(sort(abs(x-10), partial=1:2)[1:2], abs(x-10))]
# [1] 10.120992 9.617557
dput输出:
dput(x)
c(0.98799517, 1.09055728, 1.20383713, 1.32927166, 1.46857509,
1.62380423, 1.79743107, 1.99241551, 2.21226576, 2.46106916, 2.74346924,
3.06455219, 3.42958354, 3.84350238, 4.31005838, 4.83051356, 5.40199462,
6.01590035, 6.65715769, 7.30532785, 7.93823621, 8.53773241, 9.09570538,
9.61755743, 10.12099196, 10.6301818, 11.16783243, 11.74870531,
12.37719092, 13.04922392, 13.75661322, 14.49087793, 15.24414627,
16.00601247, 16.75709565, 17.46236358, 18.06882072, 18.51050094,
18.71908344, 18.63563523, 18.22123225, 17.46709279, 16.40246292,
15.09417699, 13.63404124, 12.11854915, 10.6305417, 9.22947285,
7.95056, 6.80923943, 5.80717982, 4.93764782, 4.1894745, 3.54966795,
3.00499094, 2.54283599, 2.1516578, 1.82114213, 1.54222565, 1.30703661,
1.10879707, 0.94170986, 0.80084308, 0.68201911, 0.58171175, 0.49695298,
0.42525021, 0.3645135, 0.31299262, 0.26922281, 0.2319786, 0.20023468,
0.17313291, 0.14995459, 0.1300973, 0.11305559, 0.09840485, 0.08578789,
0.07490387, 0.06549894, 0.05735864)
关于r-在向量中找到两个最接近的值，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/16446042/