CODEWITHSUNDEEP
rdataframe
Rilcon42
Rilcon42

Reputation: 9763

Force list of lists into dataframe

I am trying to turn a list of lists into a data.frame, but can't figure it out. Is there a standard function for this or something?

res<-lapply(1:5,function(x){list("RSI_MA"=x*2,"success_rate"=x,"cutoff_value"=(x+9))})
res  #WRONG
as.matrix(unlist(res),ncol=3,byrow=T) #WRONG

I would like the output to look like

RSI_MA success_rate cutoff_value
2      1            10
4      2            11
6      3            12
8      4            13
10     5            14

Upvotes: 3

Views: 639

Answers (2)

twedl
twedl

Reputation: 1648

tidyverse / dplyr answer

dplyr::bind_rows() works super well for these things.

res %>% bind_rows()
# A tibble: 5 x 3
  RSI_MA success_rate cutoff_value
   <dbl>        <int>        <dbl>
1   2.00            1         10.0
2   4.00            2         11.0
3   6.00            3         12.0
4   8.00            4         13.0
5  10.0             5         14.0

Upvotes: 3

Zheyuan Li
Zheyuan Li

Reputation: 73385

How about

## can use `rbind`
do.call(rbind.data.frame, lapply(res, as.data.frame))

#  RSI_MA success_rate cutoff_value
#1      2            1           10
#2      4            2           11
#3      6            3           12
#4      8            4           13
#5     10            5           14

Actually, this will work too:

## have to use `rbind.data.frame`
do.call(rbind.data.frame, res)

Upvotes: 2

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