[英]Filter df according to multiple conditions with dyplr in R
I have a df structured like this: 我有一个这样的df结构:
a. b.
L. 1
L. 2
M. 3
M. 2
"a" and "b" are columns names. “ a”和“ b”是列名。
I want to filter the dataframe using dplyr. 我想使用dplyr过滤数据帧。 The conditions are:
if (a == L & b > 1)
and at the same time if (a == M & b > 2)
条件是:
if (a == L & b > 1)
,同时 if (a == M & b > 2)
the result would be: 结果将是:
a. b.
L. 2
M. 3
how can I do? 我能怎么做? thank you in advance!
先感谢您!
>tibble(a=c('L','L','M','M'),b=c(1:3,2)) %>%
+ dplyr::filter((a == 'L' & b > 1) | (a == 'M' & b > 2))
# A tibble: 2 x 2
# a b
# <chr> <dbl>
#1 L 2
#2 M 3
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