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Rui Barradas

2021-Jan-16 07:01 UTC

[R] Converting "day of year" to "year", "month" and "day"

Hello,

Thanks for the data, it makes things easier.

df1 <- read.table("Jibrin_data.txt", header = TRUE)
#'data.frame':	168 obs. of  4 variables:
# $ year: int  1998 1998 1998 1998 1998 1998 1998 1998 1998 1998 ...
# $ day : int  1 2 3 4 5 6 7 8 9 10 ...
# $ Hr  : int  0 0 0 0 0 0 0 0 0 0 ...
# $ SWS : num  344 346 356 332 302 329 395 359 471 392 ...

Here is a simple way of converting the year and day of year columns to a 
column of class "Date".
Like others have said, there are also CRAN packages to handle date/time 
data, my favorite being package lubridate, but base R can do it.


df1$date <- as.Date(paste(df1$year, df1$day),
                     format = "%Y %j",
                     origin = "1998-01-01")

head(df1)
#  year day Hr SWS       date
#1 1998   1  0 344 1998-01-01
#2 1998   2  0 346 1998-01-02
#3 1998   3  0 356 1998-01-03
#4 1998   4  0 332 1998-01-04
#5 1998   5  0 302 1998-01-05
#6 1998   6  0 329 1998-01-06


Hope this helps,

Rui Barradas


?s 06:48 de 16/01/21, Jibrin Alhassan escreveu:> Hi Barradas
>  ?Sorry for the delay. Below is a section of my data. I have up to 1826 
> covering 1998 to 2002
> year ? day Hr SWS
> 1998 ? 1 ?0 ?344.
> 1998 ? 2 ?0 ?346.
> 1998 ? 3 ?0 ?356.
> 1998 ? 4 ?0 ?332.
> 1998 ? 5 ?0 ?302.
> 1998 ? 6 ?0 ?329.
> 1998 ? 7 ?0 ?395.
> 1998 ? 8 ?0 ?359.
> 1998 ? 9 ?0 ?471.
> 1998 ?10 ?0 ?392.
> 1998 ?11 ?0 ?346.
> 1998 ?12 ?0 ?387.
> 1998 ?13 ?0 ?393.
> 1998 ?14 ?0 ?367.
> 1998 ?15 ?0 ?320.
> 1998 ?16 ?0 ?309.
> 1998 ?17 ?0 ?341.
> 1998 ?18 ?0 ?329.
> 1998 ?19 ?0 ?322.
> 1998 ?20 ?0 ?429.
> 1998 ?21 ?0 ?433.
> 1998 ?22 ?0 ?398.
> 1998 ?23 ?0 ?393.
> 1998 ?24 ?0 ?393.
> 1998 ?25 ?0 ?423.
> 1998 ?26 ?0 ?426.
> 1998 ?27 ?0 ?429.
> 1998 ?28 ?0 ?386.
> 1998 ?29 ?0 ?381.
> 1998 ?30 ?0 ?375.
> 1998 ?31 ?0 ?365.
> 1998 ?32 ?0 ?450.
> 1998 ?33 ?0 ?381.
> 1998 ?34 ?0 ?316.
> 1998 ?35 ?0 ?351.
> 1998 ?36 ?0 ?306.
> 1998 ?37 ?0 ?312.
> 1998 ?38 ?0 ?320.
> 1998 ?39 ?0 ?339.
> 1998 ?40 ?0 ?395.
> 1998 ?41 ?0 ?429.
> 1998 ?42 ?0 ?479.
> 1998 ?43 ?0 ?495.
> 1998 ?44 ?0 ?407.
> 1998 ?45 ?0 ?358.
> 1998 ?46 ?0 ?360.
> 1998 ?47 ?0 ?382.
> 1998 ?48 ?0 ?394.
> 1998 ?49 ?0 ?393.
> 1998 ?50 ?0 ?435.
> 1998 ?51 ?0 ?408.
> 1998 ?52 ?0 ?360.
> 1998 ?53 ?0 ?372.
> 1998 ?54 ?0 ?376.
> 1998 ?55 ?0 ?379.
> 1998 ?56 ?0 ?361.
> 1998 ?57 ?0 ?333.
> 1998 ?58 ?0 ?321.
> 1998 ?59 ?0 ?344.
> 1998 ?60 ?0 ?412.
> 1998 ?61 ?0 ?428.
> 1998 ?62 ?0 ?401.
> 1998 ?63 ?0 ?369.
> 1998 ?64 ?0 ?343.
> 1998 ?65 ?0 ?330.
> 1998 ?66 ?0 ?317.
> 1998 ?67 ?0 ?296.
> 1998 ?68 ?0 ?282.
> 1998 ?69 ?0 ?404.
> 1998 ?70 ?0 ?530.
> 1998 ?71 ?0 ?525.
> 1998 ?72 ?0 ?484.
> 1998 ?73 ?0 ?430.
> 1998 ?74 ?0 ?388.
> 1998 ?75 ?0 ?347.
> 1998 ?76 ?0 ?337.
> 1998 ?77 ?0 ?342.
> 1998 ?78 ?0 ?305.
> 1998 ?79 ?0 ?329.
> 1998 ?80 ?0 ?420.
> 1998 ?81 ?0 ?564.
> 1998 ?82 ?0 ?483.
> 1998 ?83 ?0 ?385.
> 1998 ?84 ?0 ?393.
> 1998 ?85 ?0 ?437.
> 1998 ?86 ?0 ?441.
> 1998 ?87 ?0 ?434.
> 1998 ?88 ?0 ?471.
> 1998 ?89 ?0 ?429.
> 1998 ?90 ?0 ?412.
> 1998 ?91 ?0 ?370.
> 1998 ?92 ?0 ?326.
> 1998 ?93 ?0 ?357.
> 1998 ?94 ?0 ?338.
> 1998 ?95 ?0 ?380.
> 1998 ?96 ?0 ?339.
> 1998 ?97 ?0 ?312.
> 1998 ?98 ?0 ?313.
> 1998 ?99 ?0 ?327.
> 1998 100 ?0 ?362.
> 1998 101 ?0 ?358.
> 1998 102 ?0 ?387.
> 1998 103 ?0 ?397.
> 1998 104 ?0 ?375.
> 1998 105 ?0 ?350.
> 1998 106 ?0 ?357.
> 1998 107 ?0 ?472.
> 1998 108 ?0 ?526.
> 1998 109 ?0 ?396.
> 1998 110 ?0 ?374.
> 1998 111 ?0 ?376.
> 1998 112 ?0 ?355.
> 1998 113 ?0 ?343.
> 1998 114 ?0 ?425.
> 1998 115 ?0 ?426.
> 1998 116 ?0 ?479.
> 1998 117 ?0 ?469.
> 1998 118 ?0 ?425.
> 1998 119 ?0 ?344.
> 1998 120 ?0 ?341.
> 1998 121 ?0 ?426.
> 1998 122 ?0 ?601.
> 1998 123 ?0 ?476.
> 1998 124 ?0 ?670.
> 1998 125 ?0 ?585.
> 1998 126 ?0 ?496.
> 1998 127 ?0 ?479.
> 1998 128 ?0 ?569.
> 1998 129 ?0 ?531.
> 1998 130 ?0 ?489.
> 1998 131 ?0 ?484.
> 1998 132 ?0 ?480.
> 1998 133 ?0 ?393.
> 1998 134 ?0 ?332.
> 1998 135 ?0 ?327.
> 1998 136 ?0 ?493.
> 1998 137 ?0 ?493.
> 1998 138 ?0 ?430.
> 1998 139 ?0 ?396.
> 1998 140 ?0 ?408.
> 1998 141 ?0 ?416.
> 1998 142 ?0 ?376.
> 1998 143 ?0 ?375.
> 1998 144 ?0 ?415.
> 1998 145 ?0 ?407.
> 1998 146 ?0 ?398.
> 1998 147 ?0 ?352.
> 1998 148 ?0 ?349.
> 1998 149 ?0 ?517.
> 1998 150 ?0 ?597.
> 1998 151 ?0 ?480.
> 1998 152 ?0 ?435.
> 1998 153 ?0 ?408.
> 1998 154 ?0 ?441.
> 1998 155 ?0 ?397.
> 1998 156 ?0 ?374.
> 1998 157 ?0 ?413.
> 1998 158 ?0 ?582.
> 1998 159 ?0 ?513.
> 1998 160 ?0 ?459.
> 1998 161 ?0 ?466.
> 1998 162 ?0 ?414.
> 1998 163 ?0 ?354.
> 1998 164 ?0 ?341.
> 1998 165 ?0 ?343.
> 1998 166 ?0 ?369.
> 1998 167 ?0 ?411.
> 1998 168 ?0 ?355.
> Thanks
> Jibrin
> 
> On Fri, Jan 15, 2021 at 7:15 PM Rui Barradas <ruipbarradas at sapo.pt 
> <mailto:ruipbarradas at sapo.pt>> wrote:
> 
>     Hello,
> 
>     No dataset was attached. Like the posting guide says,
> 
>     No binary attachments except for PS, PDF, and some image and archive
>     formats (others are automatically stripped off because they can contain
>     malicious software). Files in other formats and larger ones should
>     rather be put on the web and have only their URLs posted. This way a
>     reader has the option to download them or not.
> 
> 
>     Can you post sample data? Please post the output of `dput(df)`. Or, if
>     it is too big the output of `dput(head(df, 20))`. (`df` is the name of
>     your dataset.)
> 
>     Hope this helps,
> 
>     Rui Barradas
> 
>     ?s 11:30 de 15/01/21, Jibrin Alhassan escreveu:
>      > Dear R users,
>      > I am very new to R software. I have solar wind speed data needed
>     for my
>      > work. How do I convert day in the year to year, month, and day
with R
>      > software? I have used this code
>      > as.Date(0, origin = "1998-01-01")
>      > but it can only convert one day of the year at a time. Meanwhile,
>     I have up
>      > to the 1998-2002 data set. Attached is my data.
>      > Kindly help, please.
>      > Jibrin Alhassan
>      > ______________________________________________
>      > R-help at r-project.org <mailto:R-help at r-project.org>
mailing list
>     -- To UNSUBSCRIBE and more, see
>      > https://stat.ethz.ch/mailman/listinfo/r-help
>      > PLEASE do read the posting guide
>     http://www.R-project.org/posting-guide.html
>      > and provide commented, minimal, self-contained, reproducible
code.
>      >
>

Jibrin Alhassan

2021-Jan-17 15:12 UTC

head link

[R] Converting "day of year" to "year", "month" and "day"

Hi Barradas,
Thanks for your assistance. It has brought me closer to what I am looking
for. I tried your code as shown below:> df1 <- read.table("SWSdata_1998_2002", header = TRUE)
> df1$date <- as.Date(paste(df1$year, df1$day),format = "%Y
%j",origin "1998-01-01")
> head(df1)  year day Hr SWS       date
1 1998   1  0 344 1998-01-01
2 1998   2  0 346 1998-01-02
3 1998   3  0 356 1998-01-03
4 1998   4  0 332 1998-01-04
5 1998   5  0 302 1998-01-05
6 1998   6  0 329 1998-01-06
What I need is the last two columns only (SWS, date). The first 3 columns
(year, day Hr should go). Your code produced only 6 datasets. My dataset is
1,826 from 1998 to 2002. How do I generate this at once?
Many many thanks for your time. I have pasted below a section of my dataset
for your guidance, please.
Jibrin
year   day Hr SWS
1998   1  0  344.
1998   2  0  346.
1998   3  0  356.
1998   4  0  332.
1998   5  0  302.
1998   6  0  329.
1998   7  0  395.
1998   8  0  359.
1998   9  0  471.
1998  10  0  392.
1998  11  0  346.
1998  12  0  387.
1998  13  0  393.
1998  14  0  367.
1998  15  0  320.
1998  16  0  309.
1998  17  0  341.
1998  18  0  329.
1998  19  0  322.
1998  20  0  429.
1998  21  0  433.
1998  22  0  398.
1998  23  0  393.
1998  24  0  393.
1998  25  0  423.
1998  26  0  426.
1998  27  0  429.
1998  28  0  386.
1998  29  0  381.
1998  30  0  375.
1998  31  0  365.
1998  32  0  450.
1998  33  0  381.
1998  34  0  316.
1998  35  0  351.
1998  36  0  306.
1998  37  0  312.
1998  38  0  320.
1998  39  0  339.
1998  40  0  395.
1998  41  0  429.
1998  42  0  479.
1998  43  0  495.
1998  44  0  407.
1998  45  0  358.
1998  46  0  360.
1998  47  0  382.
1998  48  0  394.
1998  49  0  393.
1998  50  0  435.
1998  51  0  408.
1998  52  0  360.
1998  53  0  372.
1998  54  0  376.
1998  55  0  379.
1998  56  0  361.
1998  57  0  333.
1998  58  0  321.
1998  59  0  344.
1998  60  0  412.
1998  61  0  428.
1998  62  0  401.
1998  63  0  369.
1998  64  0  343.
1998  65  0  330.
1998  66  0  317.
1998  67  0  296.
1998  68  0  282.
1998  69  0  404.
1998  70  0  530.
1998  71  0  525.
1998  72  0  484.
1998  73  0  430.
1998  74  0  388.
1998  75  0  347.
1998  76  0  337.
1998  77  0  342.
1998  78  0  305.
1998  79  0  329.
1998  80  0  420.
1998  81  0  564.
1998  82  0  483.
1998  83  0  385.
1998  84  0  393.
1998  85  0  437.
1998  86  0  441.
1998  87  0  434.
1998  88  0  471.
1998  89  0  429.
1998  90  0  412.
1998  91  0  370.
1998  92  0  326.
1998  93  0  357.
1998  94  0  338.
1998  95  0  380.
1998  96  0  339.
1998  97  0  312.
1998  98  0  313.
1998  99  0  327.
1998 100  0  362.
1998 101  0  358.
1998 102  0  387.
1998 103  0  397.
1998 104  0  375.
1998 105  0  350.
1998 106  0  357.
1998 107  0  472.
1998 108  0  526.
1998 109  0  396.
1998 110  0  374.
1998 111  0  376.
1998 112  0  355.
1998 113  0  343.
1998 114  0  425.
1998 115  0  426.
1998 116  0  479.
1998 117  0  469.
1998 118  0  425.
1998 119  0  344.
1998 120  0  341.
1998 121  0  426.
1998 122  0  601.
1998 123  0  476.
1998 124  0  670.
1998 125  0  585.
1998 126  0  496.
1998 127  0  479.
1998 128  0  569.
1998 129  0  531.
1998 130  0  489.
1998 131  0  484.
1998 132  0  480.
1998 133  0  393.
1998 134  0  332.
1998 135  0  327.
1998 136  0  493.
1998 137  0  493.
1998 138  0  430.
1998 139  0  396.
1998 140  0  408.
1998 141  0  416.
1998 142  0  376.
1998 143  0  375.
1998 144  0  415.
1998 145  0  407.
1998 146  0  398.
1998 147  0  352.
1998 148  0  349.
1998 149  0  517.
1998 150  0  597.
1998 151  0  480.
1998 152  0  435.
1998 153  0  408.
1998 154  0  441.
1998 155  0  397.
1998 156  0  374.
1998 157  0  413.
1998 158  0  582.
1998 159  0  513.
1998 160  0  459.
1998 161  0  466.
1998 162  0  414.
1998 163  0  354.
1998 164  0  341.
1998 165  0  343.
1998 166  0  369.
1998 167  0  411.
1998 168  0  355.
1998 169  0  333.
1998 170  0  443.
1998 171  0  426.
1998 172  0  419.
1998 173  0  404.
1998 174  0  387.
1998 175  0  460.
1998 176  0  447.
1998 177  0  469.
1998 178  0  447.
1998 179  0  389.
1998 180  0  375.
1998 181  0  354.
1998 182  0  316.
1998 183  0  369.
1998 184  0  410.
1998 185  0  406.
1998 186  0  477.
1998 187  0  583.
1998 188  0  458.
1998 189  0  386.
1998 190  0  342.
1998 191  0  333.
1998 192  0  369.
1998 193  0  406.
1998 194  0  375.
1998 195  0  332.
1998 196  0  310.
1998 197  0  528.
1998 198  0  530.
1998 199  0  387.
1998 200  0  385.
1998 201  0  349.
1998 202  0  409.
1998 203  0  399.
1998 204  0  619.
1998 205  0  658.
1998 206  0  581.
1998 207  0  445.
1998 208  0  370.
1998 209  0  326.
1998 210  0  334.
1998 211  0  384.
1998 212  0  423.
1998 213  0  412.
1998 214  0  404.
1998 215  0  370.
1998 216  0  384.
1998 217  0  383.
1998 218  0  378.
1998 219  0  461.
1998 220  0  460.
1998 221  0  400.
1998 222  0  447.
1998 223  0  373.
1998 224  0  379.
1998 225  0  374.
1998 226  0  374.
1998 227  0  391.
1998 228  0  348.
1998 229  0  303.
1998 230  0  279.
1998 231  0  312.
1998 232  0  331.
1998 233  0  298.
1998 234  0  341.
1998 235  0  493.
1998 236  0  436.
1998 237  0  400.
1998 238  0  633.
1998 239  0  630.
1998 240  0  583.
1998 241  0  547.
1998 242  0  550.
1998 243  0  499.
1998 244  0  444.
1998 245  0  427.
1998 246  0  401.

On Sat, Jan 16, 2021 at 8:01 AM Rui Barradas <ruipbarradas at sapo.pt>
wrote:
> Hello,
>
> Thanks for the data, it makes things easier.
>
> df1 <- read.table("Jibrin_data.txt", header = TRUE)
> #'data.frame':  168 obs. of  4 variables:
> # $ year: int  1998 1998 1998 1998 1998 1998 1998 1998 1998 1998 ...
> # $ day : int  1 2 3 4 5 6 7 8 9 10 ...
> # $ Hr  : int  0 0 0 0 0 0 0 0 0 0 ...
> # $ SWS : num  344 346 356 332 302 329 395 359 471 392 ...
>
> Here is a simple way of converting the year and day of year columns to a
> column of class "Date".
> Like others have said, there are also CRAN packages to handle date/time
> data, my favorite being package lubridate, but base R can do it.
>
>
> df1$date <- as.Date(paste(df1$year, df1$day),
>                      format = "%Y %j",
>                      origin = "1998-01-01")
>
> head(df1)
> #  year day Hr SWS       date
> #1 1998   1  0 344 1998-01-01
> #2 1998   2  0 346 1998-01-02
> #3 1998   3  0 356 1998-01-03
> #4 1998   4  0 332 1998-01-04
> #5 1998   5  0 302 1998-01-05
> #6 1998   6  0 329 1998-01-06
>
>
> Hope this helps,
>
> Rui Barradas
>
>
> ?s 06:48 de 16/01/21, Jibrin Alhassan escreveu:
> > Hi Barradas
> >   Sorry for the delay. Below is a section of my data. I have up to
1826
> > covering 1998 to 2002
> > year   day Hr SWS
> > 1998   1  0  344.
> > 1998   2  0  346.
> > 1998   3  0  356.
> > 1998   4  0  332.
> > 1998   5  0  302.
> > 1998   6  0  329.
> > 1998   7  0  395.
> > 1998   8  0  359.
> > 1998   9  0  471.
> > 1998  10  0  392.
> > 1998  11  0  346.
> > 1998  12  0  387.
> > 1998  13  0  393.
> > 1998  14  0  367.
> > 1998  15  0  320.
> > 1998  16  0  309.
> > 1998  17  0  341.
> > 1998  18  0  329.
> > 1998  19  0  322.
> > 1998  20  0  429.
> > 1998  21  0  433.
> > 1998  22  0  398.
> > 1998  23  0  393.
> > 1998  24  0  393.
> > 1998  25  0  423.
> > 1998  26  0  426.
> > 1998  27  0  429.
> > 1998  28  0  386.
> > 1998  29  0  381.
> > 1998  30  0  375.
> > 1998  31  0  365.
> > 1998  32  0  450.
> > 1998  33  0  381.
> > 1998  34  0  316.
> > 1998  35  0  351.
> > 1998  36  0  306.
> > 1998  37  0  312.
> > 1998  38  0  320.
> > 1998  39  0  339.
> > 1998  40  0  395.
> > 1998  41  0  429.
> > 1998  42  0  479.
> > 1998  43  0  495.
> > 1998  44  0  407.
> > 1998  45  0  358.
> > 1998  46  0  360.
> > 1998  47  0  382.
> > 1998  48  0  394.
> > 1998  49  0  393.
> > 1998  50  0  435.
> > 1998  51  0  408.
> > 1998  52  0  360.
> > 1998  53  0  372.
> > 1998  54  0  376.
> > 1998  55  0  379.
> > 1998  56  0  361.
> > 1998  57  0  333.
> > 1998  58  0  321.
> > 1998  59  0  344.
> > 1998  60  0  412.
> > 1998  61  0  428.
> > 1998  62  0  401.
> > 1998  63  0  369.
> > 1998  64  0  343.
> > 1998  65  0  330.
> > 1998  66  0  317.
> > 1998  67  0  296.
> > 1998  68  0  282.
> > 1998  69  0  404.
> > 1998  70  0  530.
> > 1998  71  0  525.
> > 1998  72  0  484.
> > 1998  73  0  430.
> > 1998  74  0  388.
> > 1998  75  0  347.
> > 1998  76  0  337.
> > 1998  77  0  342.
> > 1998  78  0  305.
> > 1998  79  0  329.
> > 1998  80  0  420.
> > 1998  81  0  564.
> > 1998  82  0  483.
> > 1998  83  0  385.
> > 1998  84  0  393.
> > 1998  85  0  437.
> > 1998  86  0  441.
> > 1998  87  0  434.
> > 1998  88  0  471.
> > 1998  89  0  429.
> > 1998  90  0  412.
> > 1998  91  0  370.
> > 1998  92  0  326.
> > 1998  93  0  357.
> > 1998  94  0  338.
> > 1998  95  0  380.
> > 1998  96  0  339.
> > 1998  97  0  312.
> > 1998  98  0  313.
> > 1998  99  0  327.
> > 1998 100  0  362.
> > 1998 101  0  358.
> > 1998 102  0  387.
> > 1998 103  0  397.
> > 1998 104  0  375.
> > 1998 105  0  350.
> > 1998 106  0  357.
> > 1998 107  0  472.
> > 1998 108  0  526.
> > 1998 109  0  396.
> > 1998 110  0  374.
> > 1998 111  0  376.
> > 1998 112  0  355.
> > 1998 113  0  343.
> > 1998 114  0  425.
> > 1998 115  0  426.
> > 1998 116  0  479.
> > 1998 117  0  469.
> > 1998 118  0  425.
> > 1998 119  0  344.
> > 1998 120  0  341.
> > 1998 121  0  426.
> > 1998 122  0  601.
> > 1998 123  0  476.
> > 1998 124  0  670.
> > 1998 125  0  585.
> > 1998 126  0  496.
> > 1998 127  0  479.
> > 1998 128  0  569.
> > 1998 129  0  531.
> > 1998 130  0  489.
> > 1998 131  0  484.
> > 1998 132  0  480.
> > 1998 133  0  393.
> > 1998 134  0  332.
> > 1998 135  0  327.
> > 1998 136  0  493.
> > 1998 137  0  493.
> > 1998 138  0  430.
> > 1998 139  0  396.
> > 1998 140  0  408.
> > 1998 141  0  416.
> > 1998 142  0  376.
> > 1998 143  0  375.
> > 1998 144  0  415.
> > 1998 145  0  407.
> > 1998 146  0  398.
> > 1998 147  0  352.
> > 1998 148  0  349.
> > 1998 149  0  517.
> > 1998 150  0  597.
> > 1998 151  0  480.
> > 1998 152  0  435.
> > 1998 153  0  408.
> > 1998 154  0  441.
> > 1998 155  0  397.
> > 1998 156  0  374.
> > 1998 157  0  413.
> > 1998 158  0  582.
> > 1998 159  0  513.
> > 1998 160  0  459.
> > 1998 161  0  466.
> > 1998 162  0  414.
> > 1998 163  0  354.
> > 1998 164  0  341.
> > 1998 165  0  343.
> > 1998 166  0  369.
> > 1998 167  0  411.
> > 1998 168  0  355.
> > Thanks
> > Jibrin
> >
> > On Fri, Jan 15, 2021 at 7:15 PM Rui Barradas <ruipbarradas at
sapo.pt
> > <mailto:ruipbarradas at sapo.pt>> wrote:
> >
> >     Hello,
> >
> >     No dataset was attached. Like the posting guide says,
> >
> >     No binary attachments except for PS, PDF, and some image and
archive
> >     formats (others are automatically stripped off because they can
> contain
> >     malicious software). Files in other formats and larger ones should
> >     rather be put on the web and have only their URLs posted. This way
a
> >     reader has the option to download them or not.
> >
> >
> >     Can you post sample data? Please post the output of `dput(df)`.
Or,
> if
> >     it is too big the output of `dput(head(df, 20))`. (`df` is the
name
> of
> >     your dataset.)
> >
> >     Hope this helps,
> >
> >     Rui Barradas
> >
> >     ?s 11:30 de 15/01/21, Jibrin Alhassan escreveu:
> >      > Dear R users,
> >      > I am very new to R software. I have solar wind speed data
needed
> >     for my
> >      > work. How do I convert day in the year to year, month, and
day
> with R
> >      > software? I have used this code
> >      > as.Date(0, origin = "1998-01-01")
> >      > but it can only convert one day of the year at a time.
Meanwhile,
> >     I have up
> >      > to the 1998-2002 data set. Attached is my data.
> >      > Kindly help, please.
> >      > Jibrin Alhassan
> >      > ______________________________________________
> >      > R-help at r-project.org <mailto:R-help at
r-project.org> mailing list
> >     -- To UNSUBSCRIBE and more, see
> >      > https://stat.ethz.ch/mailman/listinfo/r-help
> >      > PLEASE do read the posting guide
> >     http://www.R-project.org/posting-guide.html
> >      > and provide commented, minimal, self-contained, reproducible
code.
> >      >
> >
>
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R help - Jan 2021 - Converting "day of year" to "year", "month" and "day"

[R] Converting "day of year" to "year", "month" and "day"

[R] Converting "day of year" to "year", "month" and "day"