[R] Reshape to wide format

[Miluji Sb]

Dear all,

I have the following monthly data by coordinates:

I would like to reshape this data to wide format so that each column is a
coordinate and each row is a month,

coordinate1 coordinate2 coordinate3...
Month 1
Month 2

Is the best option to concatenate the iso3, lon, and lat variables to
create an ID variable? I realize that this question might be very basic but
I'm slightly baffled. Thank you.

temp <- dput(head(precip_2000,20))
structure(list(iso3 = structure(c(1L, 1L, 1L, 1L, 1L, 1L, 1L,
1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L), .Label = c("AFG",
"AGO", "ALB", "ARE", "ARG", "ARM", "AUS", "AUT", "AZE", "BDI",
"BEL", "BEN", "BFA", "BGD", "BGR", "BHS", "BIH", "BLR", "BLZ",
"BOL", "BRA", "BRN", "BTN", "BWA", "CAF", "CAN", "CHE", "CHL",
"CHN", "CIV", "CMR", "COD", "COG", "COL", "CRI", "CUB", "CYP",
"CZE", "DEU", "DJI", "DNK", "DOM", "DZA", "ECU", "EGY", "ERI",
"ESH", "ESP", "EST", "ETH", "FIN", "FJI", "FLK", "FRA", "GAB",
"GBR", "GEO", "GHA", "GIN", "GNB", "GNQ", "GRC", "GRL", "GTM",
"GUF", "GUY", "HND", "HRV", "HTI", "HUN", "IDN", "IND", "IRL",
"IRN", "IRQ", "ISL", "ISR", "ITA", "JAM", "JOR", "JPN", "KAZ",
"KEN", "KGZ", "KHM", "KIR", "KOR", "KWT", "LAO", "LBN", "LBR",
"LBY", "LCA", "LKA", "LSO", "LTU", "LUX", "LVA", "MAR", "MDA",
"MDG", "MEX", "MKD", "MLI", "MMR", "MNE", "MNG", "MOZ", "MRT",
"MWI", "MYS", "NAM", "NCL", "NER", "NGA", "NIC", "NLD", "NOR",
"NPL", "NZL", "OMN", "PAK", "PAN", "PER", "PHL", "PNG", "POL",
"PRI", "PRK", "PRT", "PRY", "QAT", "ROU", "RUS", "RWA", "SAU",
"SDN", "SEN", "SJM", "SLB", "SLE", "SLV", "SOM", "SRB", "SUR",
"SVK", "SVN", "SWE", "SWZ", "SYR", "TCD", "TGO", "THA", "TJK",
"TKM", "TLS", "TUN", "TUR", "TWN", "TZA", "UGA", "UKR", "URY",
"USA", "UZB", "VEN", "VNM", "VUT", "YEM", "ZAF", "ZMB", "ZWE"
), class = "factor"), lon = c(61L, 61L, 61L, 61L, 61L, 61L, 61L,
61L, 61L, 61L, 61L, 61L, 61L, 61L, 61L, 61L, 61L, 61L, 61L, 61L
), lat = c(32L, 32L, 32L, 32L, 32L, 32L, 32L, 32L, 32L, 32L,
32L, 32L, 33L, 33L, 33L, 33L, 33L, 33L, 33L, 33L), dm = structure(c(1L,
5L, 6L, 7L, 8L, 9L, 10L, 11L, 12L, 2L, 3L, 4L, 1L, 5L, 6L, 7L,
8L, 9L, 10L, 11L), .Label = c("2000m1", "2000m10", "2000m11",
"2000m12", "2000m2", "2000m3", "2000m4", "2000m5", "2000m6",
"2000m7", "2000m8", "2000m9"), class = "factor"), month = c(1L,
2L, 3L, 4L, 5L, 6L, 7L, 8L, 9L, 10L, 11L, 12L, 1L, 2L, 3L, 4L,
5L, 6L, 7L, 8L), precip = c(0.996665806451613, 0.156711724137931,
0.242477419354839, 0, 0, 0, 0, 0, 0, 0, 0.121536, 0.38866064516129,
1.13312903225806, 0.355208275862069, 0.307277419354839, 0.008316,
0, 0, 0, 0.0008361290322581)), .Names = c("iso3", "lon", "lat",
"dm", "month", "precip"), row.names = c(NA, 20L), class = "data.frame")

Sincerely,

Milu

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