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更改R中數據框列中的所有值

[英]change all values in a data frame column in R

我有一個來自USGS GeoData門戶的GCM數據的大型數據集。 我需要將數據集轉換為VIC 4.2強制文件的形式。

以下是GCM數據頂部的圖像,用於說明目的:

GCM數據集

溫度數據以開爾文(Kelvin)為單位,而對於VIC 4.2,我需要以攝氏度為單位。

這是我的代碼:

# Script for createing a VIC 4.2 forcing file fromd the GCM data from the USGS:GeoData Portal
#
# Read the file. File is date, precip, MaxT, MinT, wind speed for entire year 2099
df <- read.csv("/Users/CoyoteGulch/Documents/ClearCreek/data-2.csv", header = TRUE, sep = ",")
#
# Subset the data frame and convert K to C for the VIC 4.2 forcing file
#
df.forcing <- df.forcing <- df[15:379, 2:5]
#
# Convert the temperature columns from Kelvin to Celsius
df.forcing$X.1 <- df.forcing$X.1 - 273.15
df.forcing$X.2 <- df.forcing$X.2 - 273.15

運行腳本時,我收到與最后兩行有關的兩個警告:

警告消息:1:在Ops.factor(df.forcing $ X.1,273.15)中:“-”對因素無意義2:在Ops.factor(df.forcing $ X.2,273.15):“-”中無對因素有意義

此外,X.1和X.2列中的所有值都更改為“ NA”。

dput(df.forcing)的結果

dput(df.forcing)結構(list(X = structure(c(2L,211L,116L,50L,2L,88L,2L,2L,19L,22L,62L,2L,2L,2L,2L,215L,101L, 148L,191L,155L,104L,210L,111L,2L,66L,55L,2L,2L,2L,18L,214L,92L,169L,185L,53L,221L,73L,186L,130L,106L,212L,132L, 89L,2L,216L,140L,167L,135L,125L,223L,188L,225L,2L,128L​​,70L,35L,51L,2L,133L,192L,159L,75L,85L,64L,160L,2L,2L, 91L,105L,2L,38L,113L,40L,195L,213L,157L,96L,220L,176L,141L,134L,2L,2L,158L,179L,180L,182L,48L,2L,2L,147L,24L, 227L,39L,2L,2L,2L,36L,230L,139L,172L,224L,120L,196L,184L,232L,126L,202L,122L,152L,204L,205L,78L,171L,219L,201L,2L, 2L,2L,2L,112L,127L,124L,37L,28L,2L,2L,2L,43L,228L,107L,231L,2L,2L,181L,206L,86L,136L,129L,208L,15L,25L, 143L,2L,93L,199L,49L,2L,2L,2L,2L,2L,8L,41L,2L,2L,103L,10L,2L,2L,2L,173L,115L,27L,163L,69L,2L, 2L,117L,229L,197L,30L,31L,72L,174L,94L,2L,198L,67L,95L,119L,154L,63L ,42L,33L,59L,20L,16L,6L,4L,45L,13L,187L,149L,9L,11L,207L,217L,2L,3L,74L,54L,32L,2L,123L,137L,164L,58L ,190L,161L,178L,203L,97L,2L,222L,12L,2L,2L,65L,168L,109L,71L,99L,183L,2L,52L,2L,2L,153L,175L,2L,2L,2L ,2L,5L,44L,81L,87L,2L,2L,2L,2L,2L,34L,80L,2L,14L,114L,2L,68L,150L,83L,2L,2L,2L,2L,76L,56L ,2L,2L,2L,2L,2L,2L,21L,110L,2L,2L,2L,2L,2L,100L,2L,2L,131L,156L,2L,2L,2L,2L,90L,7L,2L ,2L,29L,2L,2L,2L,2L,2L,2L,2L,2L,2L,2L,2L,189L,200L,60L,2L,2L,47L,46L,2L,2L,2L,98L,177L ,2L,2L,2L,2L,2L,2L,2L,17L,2L,2L,2L,226L,166L,218L,209L,121L,79L,84L,23L,2L,2L,2L,2L,2L,2L,138L ,233L,77L,146L,165L,61L,57L,142L,162L,170L,118L,82L,2L,194L,2L,2L,2L,26L,2L,145L,108L,234L,151L,193L,102L,2L ,2L,2L,2L,144L,2L,2L,2L),.Label = c(“”,“ 0”,“ 0.051353”,“ 0.053209”,“ 0.053888”,“ 0.054528”,“ 0.055005”,“ 0.055404” “,” 0.055677“,” 0.056041“,” 0.064086“,” 0。 064302”,“ 0.064742”,“ 0.064869”,“ 0.064968”,“ 0.07201”,“ 0.082166”,“ 0.083413”,“ 0.084715”,“ 0.087467”,“ 0.089057”,“ 0.104912”,“ 0.111725”,“ 0.116734” ,“ 0.122798”,“ 0.125993”,“ 0.133721”,“ 0.144416”,“ 0.153097”,“ 0.165308”,“ 0.166664”,“ 0.177209”,“ 0.193849”,“ 0.214523”,“ 0.238069”,“ 0.271792”,“ 0.289616”,“ 0.331024”,“ 0.343228”,“ 0.344858”,“ 0.350487”,“ 0.351759”,“ 0.355228”,“ 0.367228”,“ 0.36893”,“ 0.406118”,“ 0.408152”,“ 0.420082”,“ 0.432959” ,“ 0.464128”,“ 0.480488”,“ 0.490894”,“ 0.493248”,“ 0.514367”,“ 0.532098”,“ 0.564334”,“ 0.569712”,“ 0.583656”,“ 0.620788”,“ 0.65201”,“ 0.705851”,“ 0.721604”,“ 0.741773”,“ 0.752651”,“ 0.78506”,“ 0.785896”,“ 0.817001”,“ 0.83608”,“ 0.877556”,“ 0.916531”,“ 0.935351”,“ 0.940131”,“ 0.945448”,“ 0.971146” ,“ 0.98706”,“ 1.003”,“ 1.119203”,“ 1.143097”,“ 1.147298”,“ 1.178863”,“ 1.180787”,“ 1.18891”,“ 1.209772”,“ 1.214159”,“ 1.214449”,“ 1.223672”,“ 1.278638”,“ 1.283573”,“ 1.291003”,“ 1.29367”,“ 1.296009”,“ 1.316266”,“ 1.317941”,“ 1.48336”,“ 1.505952”,“ 1.5075” 36”,“ 1.520051”,“ 1.549106”,“ 1.567124”,“ 1.568529”,“ 1.591836”,“ 1.607509”,“ 1.616776”,“ 1.618228”,“ 1.658783”,“ 1.668356”,“ 1.701482”,“ 1.724571” ,“ 1.733679”,“ 1.761405”,“ 1.770481”,“ 1.77509”,“ 1.810844”,“ 1.849057”,“ 1.863717”,“ 1.877862”,“ 1.888823”,“ 1.937468”,“ 1.98256”,“ 10.06452”,“ 10.158648”,“ 10.239129”,“ 10.346543”,“ 10.387987”,“ 10.3915”,“ 10.512586”,“ 10.560392”,“ 10.675141”,“ 11.08884”,“ 11.37613”,“ 11.972711”,“ 13.477461”,“ 13.50885” ,“ 13.797744”,“ 13.891509”,“ 15.740662”,“ 15.806064”,“ 16.130033”,“ 17.531771”,“ 17.64015”,“ 18.093937”,“ 2.037883”,“ 2.100556”,“ 2.111043”,“ 2.242924”,“ 2.286656”,“ 2.28742”,“ 2.334287”,“ 2.336922”,“ 2.370191”,“ 2.410635”,“ 2.416346”,“ 2.438619”,“ 2.537189”,“ 2.597875”,“ 2.644497”,“ 2.67492”,“ 2.716421” ,“ 2.782552”,“ 2.78437”,“ 2.797231”,“ 2.801501”,“ 2.831995”,“ 2.972122”,“ 2.980867”,“ 21.684855”,“ 23.33168”,“ 3.078672”,“ 3.096159”,“ 3.160731”,“ 3.268467”,“ 3.281176”,“ 3.283479”,“ 3.425798”,“ 3.548023”,“ 3.577743”,“ 3.621364”,“ 3.631743”, “ 3.672817”,“ 3.722005”,“ 3.816642”,“ 3.904838”,“ 3.907431”,“ 3.965528”,“ 4.005818”,“ 4.047633”,“ 4.052677”,“ 4.076549”,“ 4.08356”,“ 4.143889”,“ 4.244564” “,” 4.301236“,” 4.599807“,” 4.799429“,” 4.87456“,” 4.875296“,” 5.160412“,” 5.160832“,” 5.192636“,” 5.221751“,” 5.241645“,” 5.270457“,” 5.346045“, “ 5.414251”,“ 5.801967”,“ 5.834321”,“ 6.018086”,“ 6.034756”,“ 6.060279”,“ 6.343235”,“ 6.375944”,“ 6.417311”,“ 6.447439”,“ 6.569529”,“ 6.662778”,“ 6.672312” “,” 7.124838“,” 7.171772“,” 7.422026“,” 7.448046“,” 7.538418“,” 7.547452“,” 7.628211“,” 7.936975“,” 8.028339“,” 8.037“,” 8.197443“,” 8.217916“, “ 8.289074”,“ 9.113519”,“ 9.260917”,“ 9.393965”,“ 9.397649”,“ 9.887436”,“ pr_GFDL-ESM2M_rcp45(mm)”),類=“因數”),X.1 =結構(c(21L ,18L,5L,15L,7L,23L,90L,93L,61L,73L,96L,109L,122L,92L,100L,30L,67L,79L,94L,88L,10L,8L,39L,33L,27L,31L ,83L,68L,52L,77L,47L,64L,89L,55L,62L,70L,99L,170L,147L,152L,121L,125L,103L,146L,113L,81L,40L,9L,26L,24L,20L ,12公升1 7L,4L,11L,37L,59L,105L,116L,53L,51L,75L,54L,56L,58L,65L,135L,156L,144L,153L,148L,149L,184L,163L,115L,95L,66L, 43L,48L,46L,35L,42L,107L,91L,72L,44L,29L,50L,28L,137L,175L,167L,140L,108L,166L,183L,206L,253L,229L,179L,150L,84L, 102L,78L,120L,141L,143L,118L,69L,101L,136L,139L,165L,162L,154L,74L,176L,210L,215L,225L,214L,127L,38L,114L,160L,190L,217L, 207L,259L,201L,228L,195L,203L,236L,226L,202L,223L,189L,182L,196L,222L,270L,245L,252L,250L,192L,209L,238L,354L,335L,361L,329L 267L,235L,231L,230L,220L,262L,302L,285L,283L,277L,288L,324L,273L,284L,325L,356L,328L,188L,177L,247L,320L,309L,254L,265L,326L 248L,185L,213L,293L,278L,304L,294L,308L,298L,275L,344L,359L,355L,358L,360L,345L,311L,305L,313L,263L,271L,301L,327L,343L,363 314L,316L,299L,221L,204L,243L,216L,258L,279L,334L,303L,297L,246L,295L,260L,312L,336L,286L,232L,266L,239L,292L, 315L,300L,307L,365L,364L,357L,333L,342L,340L,362L,341L,346L,353L,330L,339L,347L,332L,323L,352L,349L,287L,310L,272L,212L,291L 282L,331L,306L,319L,350L,337L,318L,274L,257L,261L,264L,348L,351L,338L,296L,317L,322L,241L,269L,276L,281L,321L,290L,280L,289 227L,124L,256L,251L,268L,255L,211L,157L,244L,237L,219L,194L,187L,181L,142L,112L,111L,164L,205L,249L,233L,208L,178L,123L,200L,200L 218L,224L,197L,155L,145L,174L,191L,168L,131L,161L,169L,172L,173L,198L,199L,193L,230L,234L,242L,240L,180L,128L​​,110L,119L,104L, 86L,57L,129L,151L,159L,158L,171L,186L,134L,80L,2L,19L,6L,45L,41L,36L,117L,85L,25L,3L,16L,13L,14L,49L,87L, 82L,71L,60L,106L,133L,97L,34L,76L,98L,132L,130L,138L,126L,63L,22L,32L),. Label = c(“”,“ 259.428589”,“ 260.156494”,“ 260.507629”,“ 260.720245”,“ 261.088165”,“ 261.511139”,“ 261.568298”,“ 261.803802”,“ 262.006592”,“ 262.60437”,“ 262.747131”,“ 262.898529”,“ 263.021912“,” 263.498688“,” 263.949951“,” 264.095947“,” 264.256561“,” 264.33075“,” 264.792206“,” 264.813507“,” 264.927216“,” 264.98938“,” 265.17276“,” 265.516876“,” 265.686584“ ,“ 265.807068”,“ 266.530151”,“ 266.809723”,“ 267.062683”,“ 267.197632”,“ 267.259613”,“ 267.396179”,“ 267.60611”,“ 267.6073”,“ 267.835327”,“ 267.986572”,“ 268.022369”,“ 268.045685”,“ 268.074829”,“ 268.095062”,“ 268.321381”,“ 268.331268”,“ 268.359467”,“ 268.52356”,“ 268.526123”,“ 268.528412”,“ 268.591187”,“ 268.820099”,“ 268.972412”,“ 269.051941” ,“ 269.099487”,“ 269.107727”,“ 269.305054”,“ 269.396637”,“ 269.70816”,“ 270.227875”,“ 270.339447”,“ 270.488586”,“ 270.48938”,“ 270.513428”,“ 270.563171”,“ 270.613617”,“ 270.660645”,“ 270.729828”,“ 270.777924”,“ 270.830688”,“ 271.053955”,“ 271.123169”,“ 271.128387”,“ 271.444763”,“ 271.480255”,“ 271.642059”,“ 271.688965”,“ 271.715057”,“ 271.756317” ,“ 271.791962”,“ 271.809326”,“ 271.868439”,“ 271.950012”,“ 272.044128”,“ 272.049591”,“ 272.098602”,“ 272.10318”,“ 272.213684”,“ 27 2.227142”,“ 272.278931”,“ 272.314545”,“ 272.336182”,“ 272.359741”,“ 272.594177”,“ 272.625854”,“ 272.699402”,“ 272.818604”,“ 272.927795”,“ 273.091705”,“ 273.229492”,“ 273.301147” ,“ 273.336639”,“ 273.511353”,“ 273.602844”,“ 273.727356”,“ 273.76474”,“ 273.801849”,“ 274.048553”,“ 274.05188”,“ 274.441315”,“ 274.590424”,“ 274.631287”,“ 274.699097”,“ 274.878448”,“ 274.932831”,“ 275.061615”,“ 275.070221”,“ 275.141479”,“ 275.190125”,“ 275.31485”,“ 275.318237”,“ 275.55545”,“ 275.556”,“ 275.653137”,“ 275.721649”,“ 275.72525” ,“ 275.934387”,“ 276.016174”,“ 276.041962”,“ 276.085602”,“ 276.124451”,“ 276.130249”,“ 276.159729”,“ 276.228668”,“ 276.320221”,“ 276.377441”,“ 276.539337”,“ 276.774384”,“ 276.881287”,“ 276.9198”,“ 277.092621”,“ 277.131958”,“ 277.36441”,“ 277.403442”,“ 277.439453”,“ 277.622528”,“ 277.693756”,“ 277.703644”,“ 277.85611”,“ 277.934784”,“ 277.950134” ,“ 278.095886”,“ 278.174072”,“ 278.238892”,“ 278.255829”,“ 278.452515”,“ 278.462372”,“ 278.483337”,“ 278.953766”,“ 279.100159”,“ 279.15 3931”,“ 279.294678”,“ 279.317596”,“ 279.508026”,“ 279.537079”,“ 279.621429”,“ 279.999115”,“ 280.020233”,“ 280.314301”,“ 280.455231”,“ 280.756378”,“ 280.760437”,“ 280.800446” ,“ 280.937439”,“ 280.959503”,“ 281.114929”,“ 281.257385”,“ 281.370636”,“ 281.552307”,“ 281.624176”,“ 281.831757”,“ 282.015167”,“ 282.031097”,“ 282.076813”,“ 282.382965”,“ 282.388031”,“ 282.481537”,“ 282.521057”,“ 282.834534”,“ 283.064728”,“ 283.151062”,“ 283.240356”,“ 283.414337”,“ 283.558441”,“ 283.581696”,“ 283.612152”,“ 283.621155”,“ 283.829834” ,“ 283.894073”,“ 284.020355”,“ 284.103546”,“ 284.150299”,“ 284.248383”,“ 284.259247”,“ 284.612152”,“ 285.103546”,“ 285.119568”,“ 285.257141”,“ 285.374878”,“ 285.411804”,“ 285.506897”,“ 285.709076”,“ 285.804993”,“ 286.08316”,“ 286.122467”,“ 286.183716”,“ 286.318848”,“ 286.3461”,“ 286.359772”,“ 286.477417”,“ 286.607391”,“ 286.612854”,“ 286.700134” ,“ 286.722473”,“ 286.901428”,“ 286.973389”,“ 287.097137”,“ 287.106262”,“ 287.131714”,“ 287.177216”,“ 287.442657”,“ 287.499542”,“ 2 87.500824”,“ 287.504395”,“ 287.63858”,“ 287.665527”,“ 287.748169”,“ 287.767151”,“ 287.796448”,“ 288.00058”,“ 288.007996”,“ 288.073883”,“ 288.123871”,“ 288.1604”,“ 288.160461” ,“ 288.19635”,“ 288.253998”,“ 288.373352”,“ 288.509796”,“ 288.580048”,“ 288.594025”,“ 288.63385”,“ 288.70105”,“ 288.720306”,“ 288.749908”,“ 288.798798”,“ 288.799805”,“ 288.830444”,“ 289.061127”,“ 289.072723”,“ 289.236267”,“ 289.273804”,“ 289.345306”,“ 289.424927”,“ 289.446259”,“ 289.474579”,“ 289.492249”,“ 289.553711”,“ 289.646454”,“ 289.691559” ,“ 289.805725”,“ 289.93158”,“ 289.949799”,“ 290.007263”,“ 290.026703”,“ 290.076447”,“ 290.087952”,“ 290.112732”,“ 290.32135”,“ 290.411285”,“ 290.476074”,“ 290.538147”,“ 290.558655”,“ 290.586517”,“ 290.59668”,“ 290.604584”,“ 290.740723”,“ 290.902313”,“ 290.90329”,“ 291.050934”,“ 291.055756”,“ 291.078461”,“ 291.208008”,“ 291.229462”,“ 291.285431” ,“ 291.335602”,“ 291.444427”,“ 291.512268”,“ 291.533081”,“ 291.537598”,“ 291.575806”,“ 291.576477”,“ 291.598572”,“ 291.613953”,“ 291。 615479”,“ 291.754639”,“ 291.758118”,“ 291.764374”,“ 291.771606”,“ 291.784393”,“ 291.923523”,“ 291.985321”,“ 292.100342”,“ 292.134827”,“ 292.165588”,“ 292.186615”,“ 292.27887” ,“ 292.312439”,“ 292.316559”,“ 292.339661”,“ 292.381897”,“ 292.404297”,“ 292.545471”,“ 292.630035”,“ 292.858795”,“ 292.901062”,“ 292.959442”,“ 293.159241”,“ 293.160767”,“ 293.164429”,“ 293.167084”,“ 293.178406”,“ 293.202728”,“ 293.215607”,“ 293.227539”,“ 293.341919”,“ 293.386932”,“ 293.499298”,“ 293.499969”,“ 293.562469”,“ 293.573639”,“ 293.669647” ,“ 293.714203”,“ 293.745331”,“ 293.789734”,“ 293.9664”,“ 294.072388”,“ 294.183197”,“ 294.280457”,“ 294.397034”,“ 294.428131”,“ 294.428802”,“ 294.471771”,“ 294.533569”,“ 294.546387“,” 294.676239“,” 294.817413“,” 294.94458“,” 295.06723“,” 295.449005“,” 295.520996“,” 295.610718“,” 295.675964“,” 295.922119“,” 295.93811“,” 295.983521“,” 296.814697“ ,“ 296.817841”,“ tasmax_GFDL-ESM2M_rcp45(K)”),類=“因數”),X.2 =結構(c(20L,29L,5L,8L,14L,16L,26L,81L,72L,50L, 86L,89L,83L,35L,62L,78L,95L,57L,102L,40L,15L,13L,37L,44L,36L,31L,23L,34L,71L,79L,88L,82L,109L,103L,56L, 124L,92L,159L,216L,127L,130L,98L,58L,110L,126L,139L,76L,43L,21L,42L,53L,19L,7L,27L,12L,46L,59L,118L,142L,69L, 64L,85L,75L,67L,65L,48L,66L,133L,145L,136L,129L,166L,182L,213L,91L,119L,87L,25L,52L,96L,61L,45L,106L,115L,55L, 47L,33L,30L,32L,73L,172L,167L,165L,84L,170L,163L,184L,294L,345L,197L,161L,146L,141L,100L,138L,198L,179L,144L,143L,114L, 150L,171L,187L,210L,189L,162L,137L,178L,205L,186L,225L,134L,112L,123L,169L,212L,180L,233L,295L,231L,316L,286L,232L,239L,325L, 322L,309L,285L,273L,255L,256L,302L,314L,259L,270L,236L,221L,211L,315L,357L,342L,303L,204L,199L,264L,234L,226L,289L,328L,310L 288L,312L,293L,257L,274L,290L,268L,247L,354L,331L,298L,244L,174L,292L,333L,317L,280L,219L,242L,251L,321L,329L,297L,287L,287L 282升,35 1L,238L,284L,361L,365L,359L,338L,347L,323L,340L,353L,366L,304L,301L,305L,356L,346L,281L,349L,364L,348L,245L,343L,341L,296 308L,324L,243L,250L,175L,201L,277L,362L,363L,313L,254L,260L,235L,240L,318L,222L,252L,360L,319L,278L,262L,246L,332L,344L,334L, 330L,339L,335L,358L,248L,214L,190L,275L,230L,237L,326L,336L,229L,337L,350L,327L,269L,209L,300L,311L,307L,258L,193L,283L,306L, 276L,355L,352L,320L,261L,200L,183L,223L,203L,228L,279L,266L,249L,272L,128L​​,194L,241L,207L,220L,218L,101L,125L,267L,173L,121L, 202L,120L,80L,51L,22L,74L,185L,208L,206L,196L,148L,90L,104L,227L,263L,164L,131L,41L,160L,215L,217L,113L,116L,149L,140L, 117L,154L,176L,156L,253L,299L,265L,291L,191L,224L,152L,151L,188L,157L,63L,111L,153L,147L,177L,168L,195L,158L,17L,4L,38L, 54L,28L,77L,70L,93L,105L,11L,3L,2L,24L,6L,9L,60L,107L,49L,94L,192L,181L,108L,97L,68L,99L,15 5L,122L,135L,132L,39L,10L,18L),. 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您的問題是您已經從csv文件中讀取了字符串作為因素。

嘗試使用它來讀取您的數據,以便值保持數字

df <- read.csv("/Users/CoyoteGulch/Documents/ClearCreek/data-2.csv", 
               header = TRUE, sep = ",", stringsAsFactors = FALSE)

df.forcing所有列都是factor s。

str(df.forcing)
#'data.frame':  365 obs. of  4 variables:
# $ X  : Factor w/ 235 levels "","0","0.051353",..: 2 211 116 50 2 88 2 2 19 22 ...
# $ X.1: Factor w/ 366 levels "","259.428589",..: 21 18 5 15 7 23 90 93 61 73 ...
# $ X.2: Factor w/ 367 levels "","242.450241",..: 20 29 5 8 14 16 26 81 72 50 ...
# $ X.3: Factor w/ 367 levels "","0.308711",..: 321 358 322 134 35 36 356 351 345 350 ...

轉換為numeric

library(dplyr)
df.forcing <- mutate_all(df.forcing, function(x) as.numeric(as.character(x)))
str(df.forcing)
#'data.frame':  365 obs. of  4 variables:
# $ X  : num  0 6.376 1.878 0.464 0 ...
# $ X.1: num  265 264 261 263 262 ...
# $ X.2: num  251 253 246 247 249 ...
# $ X.3: num  4.275 5.39 4.3 1.92 0.868 ...

然后像以前一樣從開爾文轉換為攝氏。

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