我想删除A列中的重复元素,并且需要合并新列中重复值的相关元素 我有这个数据框:
${nominalTime}
这是我期望的数据框:
A B Repeat
a x1 5
a x5 5
a x4 5
a x2 5
a x3 5
b x2 3
b x4 3
b x1 3
c x5 3
c x9 3
c x3 3
d x2 2
d x8 2
e x5 2
e x1 2
f x6 1
g x2 1
h x5 1
i x4 1
j x7 1
答案 0 :(得分:1)
使用dplyr
,我们可以group_by
A
并使用B
为toString
创建一个逗号分隔的值,并获得first
的值的Repeat
。
library(dplyr)
df %>%
group_by(A) %>%
summarise(new_B = toString(B),
Repeat = first(Repeat))
# A tibble: 10 x 3
# A new_B Repeat
# <fct> <chr> <int>
# 1 a x1, x5, x4, x2, x3 5
# 2 b x2, x4, x1 3
# 3 c x5, x9, x3 3
# 4 d x2, x8 2
# 5 e x5, x1 2
# 6 f x6 1
# 7 g x2 1
# 8 h x5 1
# 9 i x4 1
#10 j x7 1
答案 1 :(得分:0)
我们可以使用let tensorArr = tensor.arraySync()
fs.writeFileSync("test", JSON.stringify(tensorArr))
let test = JSON.parse(classifierFile)
tf.tensor(test)
data.table
library(data.table)
setDT(df)[, .(new_B = toString(B), Repeat = first(Repeat)), A]
# A new_B Repeat
# 1: a x1, x5, x4, x2, x3 5
# 2: b x2, x4, x1 3
# 3: c x5, x9, x3 3
# 4: d x2, x8 2
# 5: e x5, x1 2
# 6: f x6 1
# 7: g x2 1
# 8: h x5 1
# 9: i x4 1
#10: j x7 1