loading packages and csv file
library(data.table)
library(ggplot2)
Warning: package 'ggplot2' was built under R version 4.5.2
temp=fread("~/Desktop/GEOG 5680/Data/Temperature.csv")
temp
Sample Date DateNr dDay1 dDay2 dDay3 Station Area
<char> <int> <char> <int> <int> <int> <char> <char>
1: DANT.19900110 19900110 10/1/90 7 9 9 DANT WZ
2: DANT.19900206 19900206 6/2/90 34 36 36 DANT WZ
3: DANT.19900308 19900308 8/3/90 64 66 66 DANT WZ
4: DANT.19900404 19900404 4/4/90 91 93 93 DANT WZ
5: DANT.19900509 19900509 9/5/90 126 128 128 DANT WZ
---
8524: ZUID.20050926 20050926 9/26/2005 5745 5747 268 ZUID WZ
8525: ZUID.20051012 20051012 12/10/05 5761 5763 284 ZUID WZ
8526: ZUID.20051027 20051027 10/27/2005 5776 5778 299 ZUID WZ
8527: ZUID.20051110 20051110 10/11/05 5790 5792 313 ZUID WZ
8528: ZUID.20051212 20051212 12/12/05 5822 5824 345 ZUID WZ
31UE_ED50 31UN_ED50 Year Month Season Salinity Temperature CHLFa
<num> <num> <int> <int> <char> <num> <num> <num>
1: 681379.6 5920571 1990 1 winter 29.19 4.00 1.30
2: 681379.6 5920571 1990 2 winter 27.37 6.00 NA
3: 681379.6 5920571 1990 3 spring 24.99 7.30 21.10
4: 681379.6 5920571 1990 4 spring 28.79 8.20 25.00
5: 681379.6 5920571 1990 5 spring 33.28 17.40 10.20
---
8524: 733386.3 5928197 2005 9 autumn 30.91 15.47 11.40
8525: 733386.3 5928197 2005 10 autumn 31.18 13.45 8.30
8526: 733386.3 5928197 2005 10 autumn 28.67 12.09 4.56
8527: 733386.3 5928197 2005 11 autumn 29.53 9.03 4.94
8528: 733386.3 5928197 2005 12 winter 29.08 5.13 2.38
all winter observations
temp_wint=temp[Season == "winter"]
temp_wint
Sample Date DateNr dDay1 dDay2 dDay3 Station Area
<char> <int> <char> <int> <int> <int> <char> <char>
1: DANT.19900110 19900110 10/1/90 7 9 9 DANT WZ
2: DANT.19900206 19900206 6/2/90 34 36 36 DANT WZ
3: DANT.19901212 19901212 12/12/90 343 345 345 DANT WZ
4: DANT.19910116 19910116 1/16/1991 378 380 15 DANT WZ
5: DANT.19910226 19910226 2/26/1991 419 421 56 DANT WZ
---
1702: ZUID.20040216 20040216 2/16/2004 5157 5159 46 ZUID WZ
1703: ZUID.20041208 20041208 8/12/04 5453 5455 342 ZUID WZ
1704: ZUID.20050119 20050119 1/19/2005 5495 5497 18 ZUID WZ
1705: ZUID.20050218 20050218 2/18/2005 5525 5527 48 ZUID WZ
1706: ZUID.20051212 20051212 12/12/05 5822 5824 345 ZUID WZ
31UE_ED50 31UN_ED50 Year Month Season Salinity Temperature CHLFa
<num> <num> <int> <int> <char> <num> <num> <num>
1: 681379.6 5920571 1990 1 winter 29.19 4.00 1.30
2: 681379.6 5920571 1990 2 winter 27.37 6.00 NA
3: 681379.6 5920571 1990 12 winter 31.50 4.20 60.50
4: 681379.6 5920571 1991 1 winter 20.83 -0.30 2.30
5: 681379.6 5920571 1991 2 winter 28.06 3.90 3.52
---
1702: 733386.3 5928197 2004 2 winter 24.70 4.40 NA
1703: 733386.3 5928197 2004 12 winter 28.67 4.72 1.52
1704: 733386.3 5928197 2005 1 winter 28.39 3.57 4.12
1705: 733386.3 5928197 2005 2 winter 29.31 1.31 6.56
1706: 733386.3 5928197 2005 12 winter 29.08 5.13 2.38
all winter and zone NC observations
Sample Date DateNr dDay1 dDay2 dDay3 Station Area
<char> <int> <char> <int> <int> <int> <char> <char>
1: T100.19900103 19900103 3/1/90 0 2 2 T100 NC
2: T100.19900205 19900205 5/2/90 33 35 35 T100 NC
3: T100.19901218 19901218 12/18/1990 349 351 351 T100 NC
4: T100.19910116 19910116 1/16/1991 378 380 15 T100 NC
5: T100.19910205 19910205 5/2/91 398 400 35 T100 NC
---
177: T235.20040209 20040209 9/2/04 5150 5152 39 T235 NC
178: T235.20041214 20041214 12/14/2004 5459 5461 348 T235 NC
179: T235.20050126 20050126 1/26/2005 5502 5504 25 T235 NC
180: T235.20050214 20050214 2/14/2005 5521 5523 44 T235 NC
181: T235.20051220 20051220 12/20/2005 5830 5832 353 T235 NC
31UE_ED50 31UN_ED50 Year Month Season Salinity Temperature CHLFa
<num> <num> <int> <int> <char> <num> <num> <num>
1: 587650.2 6001110 1990 1 winter 34.82 8.50 0.30
2: 587650.2 6001110 1990 2 winter NA NA NA
3: 587650.2 6001110 1990 12 winter 34.80 9.20 0.40
4: 587650.2 6001110 1991 1 winter 34.86 6.10 0.68
5: 587650.2 6001110 1991 2 winter 34.53 5.20 0.34
---
177: 510032.3 6114101 2004 2 winter NA NA NA
178: 510032.3 6114101 2004 12 winter 34.96 8.47 0.62
179: 510032.3 6114101 2005 1 winter 35.09 6.44 0.62
180: 510032.3 6114101 2005 2 winter NA NA NA
181: 510032.3 6114101 2005 12 winter 33.87 8.19 1.12
only selecting the columns Area, Season, and Temperature
temp_AST = temp[,.(Area, Season, Temperature)]
temp_AST
Area Season Temperature
<char> <char> <num>
1: WZ winter 4.00
2: WZ winter 6.00
3: WZ spring 7.30
4: WZ spring 8.20
5: WZ spring 17.40
---
8524: WZ autumn 15.47
8525: WZ autumn 13.45
8526: WZ autumn 12.09
8527: WZ autumn 9.03
8528: WZ winter 5.13
only selecting the columns Area and Temperature for winter
temp_AST[Season == "winter", -c("Season")]
Area Temperature
<char> <num>
1: WZ 4.00
2: WZ 6.00
3: WZ 4.20
4: WZ -0.30
5: WZ 3.90
---
1702: WZ 4.40
1703: WZ 4.72
1704: WZ 3.57
1705: WZ 1.31
1706: WZ 5.13
total number of observations in winter
mean temperature and mean salinity in winter
temp_wint[,.(mean_temp = mean(Temperature, na.rm = T), mean_sal = mean(Salinity, na.rm=T))]
total number of observations in winter by station
temp_wint[,.N, by = .(Station)]
Station N
<char> <int>
1: DANT 50
2: DREI 52
3: G6 101
4: GROO 50
5: HAMM 55
6: HANS 56
7: HUIB 50
8: LODS 54
9: MARS 49
10: N02 115
11: N10 131
12: N20 50
13: N70 50
14: R03 32
15: SOEL 50
16: T004 97
17: T010 45
18: T100 45
19: T135 46
20: T175 45
21: T235 45
22: VLIS 84
23: W02 99
24: W20 47
25: W70 47
26: WISS 55
27: ZIJP 54
28: ZUID 52
Station N
total number of observations by stations and season
temp[,.N, by = .(Station, Season)]
Station Season N
<char> <char> <int>
1: DANT winter 50
2: DANT spring 89
3: DANT summer 89
4: DANT autumn 72
5: DREI winter 52
---
114: ZIJP autumn 61
115: ZUID winter 52
116: ZUID spring 89
117: ZUID summer 89
118: ZUID autumn 73
average temperatures by month
temp[,.(mean_temp = mean(Temperature, na.rm=T)), by = Month]
Month mean_temp
<int> <num>
1: 1 5.174210
2: 2 4.737400
3: 3 6.125961
4: 4 8.702035
5: 5 12.293479
6: 6 15.659933
7: 7 18.077343
8: 8 19.388355
9: 9 16.995974
10: 10 13.619670
11: 11 9.848891
12: 12 6.746339
average temperatures by month and area
temp[,.(mean_temp = mean(Temperature, na.rm=T)), by = .(Month, Area)]
Month Area mean_temp
<int> <char> <num>
1: 1 WZ 3.377826
2: 2 WZ 3.925800
3: 3 WZ 5.818481
4: 4 WZ 9.270805
5: 5 WZ 13.398191
---
116: 1 NC 6.789808
117: 2 NC 5.682581
118: 3 NC 5.837500
119: 11 NC 10.978269
120: 12 NC 8.716957
line plot of average temperatures by month and area
temp[,.(mean_temp = mean(Temperature, na.rm=T)),
by = .(Month, Area)] |>
ggplot(aes(Month, mean_temp, colour = Area)) + geom_line() +
scale_x_continuous(breaks = 1:12)
