Interpolating

Packages

You’ll need several packages from the tidyverse in addition to weathercan to complete the following analysis.

library(weathercan)
library(ggplot2)
library(dplyr)

General usage

You can merge weather data with other data frames by linearly interpolating between points.

For example, here we have a dataset of weather data from Kamloops

glimpse(kamloops)

## Rows: 4,368
## Columns: 37
## $ station_name     <chr> "KAMLOOPS A", "KAMLOOPS A", "KAMLOOPS A", "KAMLOOPS A", "KAMLOOPS A", "KAMLOOPS A", "KAMLOOPS A", "KAMLOOPS A…
## $ station_id       <dbl> 51423, 51423, 51423, 51423, 51423, 51423, 51423, 51423, 51423, 51423, 51423, 51423, 51423, 51423, 51423, 5142…
## $ station_operator <lgl> NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, N…
## $ prov             <chr> "BC", "BC", "BC", "BC", "BC", "BC", "BC", "BC", "BC", "BC", "BC", "BC", "BC", "BC", "BC", "BC", "BC", "BC", "…
## $ lat              <dbl> 50.7, 50.7, 50.7, 50.7, 50.7, 50.7, 50.7, 50.7, 50.7, 50.7, 50.7, 50.7, 50.7, 50.7, 50.7, 50.7, 50.7, 50.7, 5…
## $ lon              <dbl> -120.45, -120.45, -120.45, -120.45, -120.45, -120.45, -120.45, -120.45, -120.45, -120.45, -120.45, -120.45, -…
## $ elev             <dbl> 345.3, 345.3, 345.3, 345.3, 345.3, 345.3, 345.3, 345.3, 345.3, 345.3, 345.3, 345.3, 345.3, 345.3, 345.3, 345.…
## $ climate_id       <chr> "1163781", "1163781", "1163781", "1163781", "1163781", "1163781", "1163781", "1163781", "1163781", "1163781",…
## $ WMO_id           <chr> "71887", "71887", "71887", "71887", "71887", "71887", "71887", "71887", "71887", "71887", "71887", "71887", "…
## $ TC_id            <chr> "YKA", "YKA", "YKA", "YKA", "YKA", "YKA", "YKA", "YKA", "YKA", "YKA", "YKA", "YKA", "YKA", "YKA", "YKA", "YKA…
## $ date             <date> 2016-01-01, 2016-01-01, 2016-01-01, 2016-01-01, 2016-01-01, 2016-01-01, 2016-01-01, 2016-01-01, 2016-01-01, …
## $ time             <dttm> 2016-01-01 00:00:00, 2016-01-01 01:00:00, 2016-01-01 02:00:00, 2016-01-01 03:00:00, 2016-01-01 04:00:00, 201…
## $ year             <chr> "2016", "2016", "2016", "2016", "2016", "2016", "2016", "2016", "2016", "2016", "2016", "2016", "2016", "2016…
## $ month            <chr> "01", "01", "01", "01", "01", "01", "01", "01", "01", "01", "01", "01", "01", "01", "01", "01", "01", "01", "…
## $ day              <chr> "01", "01", "01", "01", "01", "01", "01", "01", "01", "01", "01", "01", "01", "01", "01", "01", "01", "01", "…
## $ hour             <chr> "00:00", "01:00", "02:00", "03:00", "04:00", "05:00", "06:00", "07:00", "08:00", "09:00", "10:00", "11:00", "…
## $ weather          <chr> NA, "Mostly Cloudy", NA, NA, "Cloudy", NA, NA, "Cloudy", NA, "Snow", "Snow", "Snow", "Snow", "Snow", "Snow", …
## $ hmdx             <dbl> NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, N…
## $ hmdx_flag        <chr> NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, N…
## $ precip_amt       <dbl> NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, N…
## $ precip_amt_flag  <chr> NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, N…
## $ pressure         <dbl> 99.95, 99.93, 99.92, 99.90, 99.86, 99.82, 99.80, 99.78, 99.77, 99.78, 99.79, 99.74, 99.69, 99.62, 99.56, 99.5…
## $ pressure_flag    <chr> NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, N…
## $ rel_hum          <dbl> 74, 76, 74, 73, 70, 71, 69, 69, 71, 71, 71, 70, 69, 70, 68, 68, 70, 74, 73, 74, 74, 74, 77, 72, 72, 73, 74, 7…
## $ rel_hum_flag     <chr> NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, N…
## $ temp             <dbl> -9.1, -9.6, -9.9, -9.5, -9.4, -9.8, -10.0, -10.2, -10.1, -9.7, -9.4, -9.0, -8.6, -8.2, -8.1, -7.7, -8.1, -8.5…
## $ temp_dew         <dbl> -12.9, -13.1, -13.7, -13.5, -13.9, -14.1, -14.7, -14.9, -14.4, -14.0, -13.7, -13.5, -13.3, -12.8, -13.0, -12.…
## $ temp_dew_flag    <chr> NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, N…
## $ temp_flag        <chr> NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, N…
## $ visib            <dbl> 64.4, 64.4, 64.4, 64.4, 64.4, 64.4, 64.4, 64.4, 48.3, 48.3, 48.3, 48.3, 48.3, 48.3, 48.3, 48.3, 24.1, 48.3, 4…
## $ visib_flag       <chr> NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, N…
## $ wind_chill       <dbl> -17, -17, -18, -17, -17, -17, -18, -17, -17, -16, -15, -14, -14, -13, -13, -13, -13, -14, -13, -14, -14, -12,…
## $ wind_chill_flag  <chr> NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, N…
## $ wind_dir         <dbl> 13, 11, 11, 11, 11, 10, 9, 7, 7, 10, 11, 10, 10, 13, 11, 10, 10, 9, 12, 10, 13, 12, 10, 12, NA, 32, 26, 26, 2…
## $ wind_dir_flag    <chr> NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, N…
## $ wind_spd         <dbl> 19, 20, 20, 18, 18, 16, 23, 15, 14, 15, 12, 11, 12, 9, 10, 12, 11, 12, 10, 11, 11, 6, 6, 4, 0, 4, 9, 10, 8, 7…
## $ wind_spd_flag    <chr> NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, N…

As well as a data set of finch visits to an RFID feeder

glimpse(finches)

## Rows: 16,886
## Columns: 10
## $ animal_id <fct> 041868FF93, 041868FF93, 041868FF93, 06200003BB, 06200003BB, 06200003BB, 06200003BB, 06200003BB, 041868BED6, 041868BE…
## $ date      <date> 2016-03-01, 2016-03-01, 2016-03-01, 2016-03-01, 2016-03-01, 2016-03-01, 2016-03-01, 2016-03-01, 2016-03-01, 2016-03…
## $ time      <dttm> 2016-03-01 06:57:42, 2016-03-01 06:58:41, 2016-03-01 07:07:21, 2016-03-01 07:32:34, 2016-03-01 07:32:35, 2016-03-01…
## $ logger_id <fct> 2300, 2300, 2300, 2400, 2400, 2400, 2400, 2400, 2300, 2300, 2300, 2300, 2300, 2400, 2300, 2400, 2400, 2400, 2400, 24…
## $ species   <chr> "Mountain Chickadee", "Mountain Chickadee", "Mountain Chickadee", "House Finch", "House Finch", "House Finch", "Hous…
## $ age       <chr> "AHY", "AHY", "AHY", "SY", "SY", "SY", "SY", "SY", "AHY", "AHY", "AHY", "AHY", "AHY", "SY", "AHY", "SY", "SY", "SY",…
## $ sex       <chr> "U", "U", "U", "M", "M", "M", "M", "M", "F", "F", "F", "F", "F", "M", "F", "M", "M", "M", "M", "M", "F", "M", "M", "…
## $ site_name <chr> "Kamloops, BC", "Kamloops, BC", "Kamloops, BC", "Kamloops, BC", "Kamloops, BC", "Kamloops, BC", "Kamloops, BC", "Kam…
## $ lon       <dbl> -120.3622, -120.3622, -120.3622, -120.3635, -120.3635, -120.3635, -120.3635, -120.3635, -120.3622, -120.3622, -120.3…
## $ lat       <dbl> 50.66967, 50.66967, 50.66967, 50.66938, 50.66938, 50.66938, 50.66938, 50.66938, 50.66967, 50.66967, 50.66967, 50.669…

Although the times in the weather data do not exactly match those in the finch data, we can merge them together through linear interpolation. This function uses the approx function from the stats package under the hood.

Here we specify that we only want the temperature (temp) column:

finches_temperature <- weather_interp(data = finches, weather = kamloops, cols = "temp")

## Error: `data` and `weather` timezones must match

Ooops! What happened?

Well the weather data on Kamloops returned by weathercan has times set in the ‘local’ timezone (without) daylight savings. For simplicity, these times are scored as “UTC” according to R.

kamloops$time[1:5]

## [1] "2016-01-01 00:00:00 UTC" "2016-01-01 01:00:00 UTC" "2016-01-01 02:00:00 UTC" "2016-01-01 03:00:00 UTC" "2016-01-01 04:00:00 UTC"

The finches data, on the other hand, is set in a true timezone:

finches$time[1:5]

## [1] "2016-03-01 06:57:42 -08" "2016-03-01 06:58:41 -08" "2016-03-01 07:07:21 -08" "2016-03-01 07:32:34 -08" "2016-03-01 07:32:35 -08"

This means that it also has daylight savings applied, eep!

To interpolate, the data must be in the same timezone. The easiest way forward is to convert the finches data to the same, ‘local’ time without daylight savings as the kamloops data.

First we’ll transform it to non-daylight savings (i.e. Etc/GMT+8, note that the +8 is intentionally inverted) with the with_tz() function from the lubridate package.

finches <- mutate(finches, time = lubridate::with_tz(time, "Etc/GMT+8"))

Now we’ll force to UTC with the force_tz() function from the lubridate package.

finches <- mutate(finches, time = lubridate::force_tz(time, "UTC"))

Now finches and kamloops data are in the same nominal and actual timezones!

Let’s continue

finches_temperature <- weather_interp(data = finches, weather = kamloops, cols = "temp")

## temp is missing 4 out of 4368 data, interpolation may be less accurate as a result.

summary(finches_temperature)

##       animal_id         date                 time                        logger_id     species              age           
##  0620000513:7624   Min.   :2016-03-01   Min.   :2016-03-01 06:57:42.00   1500:6370   Length:16886       Length:16886      
##  041868D861:2767   1st Qu.:2016-03-05   1st Qu.:2016-03-05 13:54:13.25   2100: 968   Class :character   Class :character  
##  0620000514:1844   Median :2016-03-09   Median :2016-03-09 16:54:47.00   2200:2266   Mode  :character   Mode  :character  
##  06200004F8:1386   Mean   :2016-03-08   Mean   :2016-03-09 07:45:58.05   2300:3531                                        
##  041868BED6: 944   3rd Qu.:2016-03-13   3rd Qu.:2016-03-13 08:24:58.75   2400:1477                                        
##  06200003BB: 708   Max.   :2016-03-16   Max.   :2016-03-16 16:39:30.00   2700:2274                                        
##  (Other)   :1613                                                                                                          
##      sex             site_name              lon              lat             temp       
##  Length:16886       Length:16886       Min.   :-120.4   Min.   :50.67   Min.   :-1.763  
##  Class :character   Class :character   1st Qu.:-120.4   1st Qu.:50.67   1st Qu.: 5.212  
##  Mode  :character   Mode  :character   Median :-120.4   Median :50.67   Median : 8.991  
##                                        Mean   :-120.4   Mean   :50.67   Mean   : 8.617  
##                                        3rd Qu.:-120.4   3rd Qu.:50.67   3rd Qu.:11.943  
##                                        Max.   :-120.4   Max.   :50.67   Max.   :16.353  
## 

glimpse(finches_temperature)

## Rows: 16,886
## Columns: 11
## $ animal_id <fct> 041868FF93, 041868FF93, 041868FF93, 06200003BB, 06200003BB, 06200003BB, 06200003BB, 06200003BB, 041868BED6, 041868BE…
## $ date      <date> 2016-03-01, 2016-03-01, 2016-03-01, 2016-03-01, 2016-03-01, 2016-03-01, 2016-03-01, 2016-03-01, 2016-03-01, 2016-03…
## $ time      <dttm> 2016-03-01 06:57:42, 2016-03-01 06:58:41, 2016-03-01 07:07:21, 2016-03-01 07:32:34, 2016-03-01 07:32:35, 2016-03-01…
## $ logger_id <fct> 2300, 2300, 2300, 2400, 2400, 2400, 2400, 2400, 2300, 2300, 2300, 2300, 2300, 2400, 2300, 2400, 2400, 2400, 2400, 24…
## $ species   <chr> "Mountain Chickadee", "Mountain Chickadee", "Mountain Chickadee", "House Finch", "House Finch", "House Finch", "Hous…
## $ age       <chr> "AHY", "AHY", "AHY", "SY", "SY", "SY", "SY", "SY", "AHY", "AHY", "AHY", "AHY", "AHY", "SY", "AHY", "SY", "SY", "SY",…
## $ sex       <chr> "U", "U", "U", "M", "M", "M", "M", "M", "F", "F", "F", "F", "F", "M", "F", "M", "M", "M", "M", "M", "F", "M", "M", "…
## $ site_name <chr> "Kamloops, BC", "Kamloops, BC", "Kamloops, BC", "Kamloops, BC", "Kamloops, BC", "Kamloops, BC", "Kamloops, BC", "Kam…
## $ lon       <dbl> -120.3622, -120.3622, -120.3622, -120.3635, -120.3635, -120.3635, -120.3635, -120.3635, -120.3622, -120.3622, -120.3…
## $ lat       <dbl> 50.66967, 50.66967, 50.66967, 50.66938, 50.66938, 50.66938, 50.66938, 50.66938, 50.66967, 50.66967, 50.66967, 50.669…
## $ temp      <dbl> 2.396167, 2.397806, 2.424500, 2.508556, 2.508611, 2.508667, 2.508722, 2.508778, 2.520278, 2.520500, 2.522667, 2.5228…

Let’s take a look at the interpolate points specifically

compare1 <- select(finches_temperature, time, temp)
compare1 <- mutate(compare1, type = "interpolated")
compare2 <- select(kamloops, time, temp)
compare2 <- mutate(compare2, type = "original")
compare <- bind_rows(compare1, compare2)

ggplot(data = compare, aes(x = time, y = temp, colour = type)) +
  geom_point(alpha = 0.5) +
  scale_x_datetime(limits = range(compare1$time))

## Warning: Removed 4000 rows containing missing values or values outside the scale range (`geom_point()`).

plot of chunk unnamed-chunk-10

What does this mean for our data?

ggplot(data = finches_temperature, aes(x = temp, fill = animal_id)) +
  theme_bw() +
  theme(legend.position = "none") +
  geom_histogram(binwidth = 1) +
  labs(x = "Temperature (C)", y = "Activity Count", fill = "Finch ID")

plot of chunk unnamed-chunk-11

Data gaps

By default, gaps of 2 hours (or 2 days, with a daily scale) will be interpolated over (i.e. they will be filled with values interpolated from either side of the gap), but longer gaps will be skipped and filled with NAs. You can adjust this behaviour with na_gap. Note that as Environment and Climate Change Canada data is downloaded on an hourly scale, it makes no sense to apply na_gap values of less than 1.

In this example, note the larger number of NAs in temp and how it corresponds to the missing variables in the weather dataset:

finches_temperature <- weather_interp(data = finches, weather = kamloops,
                                      cols = "temp", na_gap = 1)

## temp is missing 4 out of 4368 data, interpolation may be less accurate as a result.

summary(finches_temperature)

##       animal_id         date                 time                        logger_id     species              age           
##  0620000513:7624   Min.   :2016-03-01   Min.   :2016-03-01 06:57:42.00   1500:6370   Length:16886       Length:16886      
##  041868D861:2767   1st Qu.:2016-03-05   1st Qu.:2016-03-05 13:54:13.25   2100: 968   Class :character   Class :character  
##  0620000514:1844   Median :2016-03-09   Median :2016-03-09 16:54:47.00   2200:2266   Mode  :character   Mode  :character  
##  06200004F8:1386   Mean   :2016-03-08   Mean   :2016-03-09 07:45:58.05   2300:3531                                        
##  041868BED6: 944   3rd Qu.:2016-03-13   3rd Qu.:2016-03-13 08:24:58.75   2400:1477                                        
##  06200003BB: 708   Max.   :2016-03-16   Max.   :2016-03-16 16:39:30.00   2700:2274                                        
##  (Other)   :1613                                                                                                          
##      sex             site_name              lon              lat             temp       
##  Length:16886       Length:16886       Min.   :-120.4   Min.   :50.67   Min.   :-1.763  
##  Class :character   Class :character   1st Qu.:-120.4   1st Qu.:50.67   1st Qu.: 5.156  
##  Mode  :character   Mode  :character   Median :-120.4   Median :50.67   Median : 8.998  
##                                        Mean   :-120.4   Mean   :50.67   Mean   : 8.610  
##                                        3rd Qu.:-120.4   3rd Qu.:50.67   3rd Qu.:11.951  
##                                        Max.   :-120.4   Max.   :50.67   Max.   :16.353  
##                                                                         NA's   :195

finches_temperature %>%
  select(date, time, temp) %>%
  filter(is.na(temp))

## # A tibble: 195 × 3
##    date       time                 temp
##    <date>     <dttm>              <dbl>
##  1 2016-03-08 2016-03-08 12:10:10    NA
##  2 2016-03-08 2016-03-08 12:10:11    NA
##  3 2016-03-08 2016-03-08 12:10:13    NA
##  4 2016-03-08 2016-03-08 12:10:14    NA
##  5 2016-03-08 2016-03-08 12:12:26    NA
##  6 2016-03-08 2016-03-08 12:12:28    NA
##  7 2016-03-08 2016-03-08 12:12:29    NA
##  8 2016-03-08 2016-03-08 12:12:30    NA
##  9 2016-03-08 2016-03-08 12:12:32    NA
## 10 2016-03-08 2016-03-08 12:12:33    NA
## # ℹ 185 more rows

kamloops %>%
  select(time, temp) %>%
  filter(is.na(temp))

## # A tibble: 4 × 2
##   time                 temp
##   <dttm>              <dbl>
## 1 2016-02-11 19:00:00    NA
## 2 2016-03-08 13:00:00    NA
## 3 2016-03-11 01:00:00    NA
## 4 2016-04-09 00:00:00    NA

Multiple weather columns

We could also add in more than one column at a time:

finches_weather <- weather_interp(data = finches, weather = kamloops,
                                  cols = c("temp", "wind_spd"))

## temp is missing 4 out of 4368 data, interpolation may be less accurate as a result.

## wind_spd is missing 4 out of 4368 data, interpolation may be less accurate as a result.

summary(finches_weather)

##       animal_id         date                 time                        logger_id     species              age           
##  0620000513:7624   Min.   :2016-03-01   Min.   :2016-03-01 06:57:42.00   1500:6370   Length:16886       Length:16886      
##  041868D861:2767   1st Qu.:2016-03-05   1st Qu.:2016-03-05 13:54:13.25   2100: 968   Class :character   Class :character  
##  0620000514:1844   Median :2016-03-09   Median :2016-03-09 16:54:47.00   2200:2266   Mode  :character   Mode  :character  
##  06200004F8:1386   Mean   :2016-03-08   Mean   :2016-03-09 07:45:58.05   2300:3531                                        
##  041868BED6: 944   3rd Qu.:2016-03-13   3rd Qu.:2016-03-13 08:24:58.75   2400:1477                                        
##  06200003BB: 708   Max.   :2016-03-16   Max.   :2016-03-16 16:39:30.00   2700:2274                                        
##  (Other)   :1613                                                                                                          
##      sex             site_name              lon              lat             temp           wind_spd    
##  Length:16886       Length:16886       Min.   :-120.4   Min.   :50.67   Min.   :-1.763   Min.   : 0.00  
##  Class :character   Class :character   1st Qu.:-120.4   1st Qu.:50.67   1st Qu.: 5.212   1st Qu.:10.35  
##  Mode  :character   Mode  :character   Median :-120.4   Median :50.67   Median : 8.991   Median :17.72  
##                                        Mean   :-120.4   Mean   :50.67   Mean   : 8.617   Mean   :17.15  
##                                        3rd Qu.:-120.4   3rd Qu.:50.67   3rd Qu.:11.943   3rd Qu.:21.95  
##                                        Max.   :-120.4   Max.   :50.67   Max.   :16.353   Max.   :40.93  
## 

glimpse(finches_weather)

## Rows: 16,886
## Columns: 12
## $ animal_id <fct> 041868FF93, 041868FF93, 041868FF93, 06200003BB, 06200003BB, 06200003BB, 06200003BB, 06200003BB, 041868BED6, 041868BE…
## $ date      <date> 2016-03-01, 2016-03-01, 2016-03-01, 2016-03-01, 2016-03-01, 2016-03-01, 2016-03-01, 2016-03-01, 2016-03-01, 2016-03…
## $ time      <dttm> 2016-03-01 06:57:42, 2016-03-01 06:58:41, 2016-03-01 07:07:21, 2016-03-01 07:32:34, 2016-03-01 07:32:35, 2016-03-01…
## $ logger_id <fct> 2300, 2300, 2300, 2400, 2400, 2400, 2400, 2400, 2300, 2300, 2300, 2300, 2300, 2400, 2300, 2400, 2400, 2400, 2400, 24…
## $ species   <chr> "Mountain Chickadee", "Mountain Chickadee", "Mountain Chickadee", "House Finch", "House Finch", "House Finch", "Hous…
## $ age       <chr> "AHY", "AHY", "AHY", "SY", "SY", "SY", "SY", "SY", "AHY", "AHY", "AHY", "AHY", "AHY", "SY", "AHY", "SY", "SY", "SY",…
## $ sex       <chr> "U", "U", "U", "M", "M", "M", "M", "M", "F", "F", "F", "F", "F", "M", "F", "M", "M", "M", "M", "M", "F", "M", "M", "…
## $ site_name <chr> "Kamloops, BC", "Kamloops, BC", "Kamloops, BC", "Kamloops, BC", "Kamloops, BC", "Kamloops, BC", "Kamloops, BC", "Kam…
## $ lon       <dbl> -120.3622, -120.3622, -120.3622, -120.3635, -120.3635, -120.3635, -120.3635, -120.3635, -120.3622, -120.3622, -120.3…
## $ lat       <dbl> 50.66967, 50.66967, 50.66967, 50.66938, 50.66938, 50.66938, 50.66938, 50.66938, 50.66967, 50.66967, 50.66967, 50.669…
## $ temp      <dbl> 2.396167, 2.397806, 2.424500, 2.508556, 2.508611, 2.508667, 2.508722, 2.508778, 2.520278, 2.520500, 2.522667, 2.5228…
## $ wind_spd  <dbl> 19.00000, 19.00000, 18.51000, 16.82889, 16.82778, 16.82667, 16.82556, 16.82444, 16.59444, 16.59000, 16.54667, 16.542…

finches_weather <- finches_weather %>%
  group_by(date) %>%
  summarize(n = length(time),
            temp = mean(temp),
            wind_spd = mean(wind_spd))

ggplot(data = finches_weather, aes(x = date, y = n)) +
  theme_bw() +
  theme(legend.position = "top") +
  geom_bar(stat = "identity") +
  geom_line(aes(y = temp * 50, colour = "Temperature"), size = 2) +
  geom_line(aes(y = wind_spd * 50, colour = "Wind Speed"), size = 2) +
  scale_colour_discrete(name = "") +
  scale_y_continuous(
    name = "Activity Counts",
    sec.axis = sec_axis(~. / 50, name = "Temperature (C) / Wind Speed (km/h)"))

## Warning: Using `size` aesthetic for lines was deprecated in ggplot2 3.4.0.
## ℹ Please use `linewidth` instead.
## This warning is displayed once every 8 hours.
## Call `lifecycle::last_lifecycle_warnings()` to see where this warning was generated.

plot of chunk unnamed-chunk-13