I am having some problems using the map()
function along with the nest()
function.
I have some data set up like the following:
counter
counter date_time total
1 06032013 2013-06-03 16:00:00 476
2 06032013 2013-06-03 17:00:00 578
3 06032013 2013-06-03 18:00:00 406
4 06032013 2013-06-03 19:00:00 272
5 06032013 2013-06-03 20:00:00 240
6 06032013 2013-06-03 21:00:00 96
7 06032013 2013-06-03 22:00:00 67
8 06032013 2013-06-03 23:00:00 37
9 06032013 2013-06-04 00:00:00 10
10 06032013 2013-06-04 01:00:00 11
11 06032013 2013-06-04 02:00:00 8
12 06032013 2013-06-04 03:00:00 9
13 06032013 2013-06-04 04:00:00 23
14 06032013 2013-06-04 05:00:00 83
15 06032013 2013-06-04 06:00:00 291
16 06032013 2013-06-04 07:00:00 532
17 06032013 2013-06-04 08:00:00 434
18 06032013 2013-06-04 09:00:00 326
19 06032013 2013-06-04 10:00:00 310
20 06032013 2013-06-04 11:00:00 292
I then nested these data based on the counter
field. Such as:
y <- counters %>% nest(-counter)
y
# A tibble: 140 × 2
counter data
<chr> <list>
1 06032013 <tibble [91 × 2]>
2 62295051 <tibble [310 × 2]>
3 81295014 <tibble [301 × 2]>
4 81295015 <tibble [294 × 2]>
5 81295091 <tibble [303 × 2]>
6 81295092 <tibble [306 × 2]>
7 81313062 <tibble [142 × 2]>
8 81313063 <tibble [142 × 2]>
9 82295046 <tibble [139 × 2]>
10 82295050 <tibble [141 × 2]>
What I want to do is map over each nested data frame and construct an xts matrix in my nested data frame. I tried many variations of the following code:
y %>% mutate(stuff = map(xts(data$total, order.by = data$date_time)))
I am greeted with Error in data$date_time : object of type 'closure' is not subsettable
.
Any thoughts would be great!
@Michael-Griffiths thank you for your help! The following code worked for me:
Still not 100% sure as to why. But hey, it worked.