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R清潔CSV文件

2016-05-17 63 views
3

我正在研究天氣數據。我試圖清理一個csv文件，但不斷收到奇怪的錯誤。在csv文件9999和-9999中爲空值。我想刪除其中一半以上的值爲9999或-9999的所有列。我在csv文件中讀取。然後初始化一個空矩陣，使其與在csv文件中讀取時創建的數據框尺寸相同。我遍歷數據框「文件」中的列，檢查是否有任何na或空字符串的值。我創建了一個向量「meta」，並從plyr庫調用count來聚合數據框中的所有列。然後我遍歷行並檢查是否有任何na值在行中，然後檢查if 9999或-9999是否在向量元行中。然後我會查看頻率是否大於列中行數的一半。如果是，則將這些值添加到乾淨的矩陣中。我不斷收到奇怪的錯誤，而乾淨矩陣中的值並不是我所預期的。我會附上兩個截圖。我還會附上csv文件和R代碼。R清潔CSV文件

感謝

errors values in the clean matrix 1

file <- read.csv(header = TRUE, file = "C:\\Users\\michael.guarino1\\Desktop\\weather\\nov_6_2012\\735144.csv") 
clean <- matrix(0, nrow(file), ncol(file))#initialize matrix of same dimensions as file 
library(plyr) 
count <- 1 #initialize count to 1 
for (i in 1:ncol(file)) { 
    if (!any(is.na(file[,i]))|!any(file[,i]==" ")) { 
    meta <- count(file, i) 
    for(row in 1:nrow(meta)){ 
    if(!is.na(meta[row,1])){ 
     if (meta[row,1]== -9999 | meta[row,1]== 9999) { 
     print("condition 1 found") 

     if (meta$freq < (nrow(file)/2)) { 
      print("condition 2 found") 
      clean[, count] <- file[, i] 

      count <- count + 1 
     } 
     } 
    } 

     #else{ 
     # clean[, count] <- file[, i] 
     #count <- count + 1 
    # } 
    } 

    } 
    else{ 
    next 
    } 
} 
print("meta") 
print(meta) 
print("clean") 
print(clean) 


    STATION,STATION_NAME,ELEVATION,LATITUDE,LONGITUDE,DATE,MDPR,Measurement Flag,Quality Flag,Source Flag,Time of Observation,MDSF,Measurement Flag,Quality Flag,Source Flag,Time of Observation,DAPR,Measurement Flag,Quality Flag,Source Flag,Time of Observation,DASF,Measurement Flag,Quality Flag,Source Flag,Time of Observation,PRCP,Measurement Flag,Quality Flag,Source Flag,Time of Observation,SNWD,Measurement Flag,Quality Flag,Source Flag,Time of Observation,SNOW,Measurement Flag,Quality Flag,Source Flag,Time of Observation,TMAX,Measurement Flag,Quality Flag,Source Flag,Time of Observation,TMIN,Measurement Flag,Quality Flag,Source Flag,Time of Observation,TOBS,Measurement Flag,Quality Flag,Source Flag,Time of Observation,PGTM,Measurement Flag,Quality Flag,Source Flag,Time of Observation,WT09,Measurement Flag,Quality Flag,Source Flag,Time of Observation,WT07,Measurement Flag,Quality Flag,Source Flag,Time of Observation,WT01,Measurement Flag,Quality Flag,Source Flag,Time of Observation,WT06,Measurement Flag,Quality Flag,Source Flag,Time of Observation,WT05,Measurement Flag,Quality Flag,Source Flag,Time of Observation,WT02,Measurement Flag,Quality Flag,Source Flag,Time of Observation,WT11,Measurement Flag,Quality Flag,Source Flag,Time of Observation,WT04,Measurement Flag,Quality Flag,Source Flag,Time of Observation,WT16,Measurement Flag,Quality Flag,Source Flag,Time of Observation,WT08,Measurement Flag,Quality Flag,Source Flag,Time of Observation,WT18,Measurement Flag,Quality Flag,Source Flag,Time of Observation,WT03,Measurement Flag,Quality Flag,Source Flag,Time of Observation 
GHCND:USR0000IPOB,POTTER BUTTE IDAHO ID US,1502.7,43.2261,-113.5744,20081104,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,40,H, ,U,9999,30,H, ,U,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999 
GHCND:USW00004842,WOOSTER WAYNE CO AIRPORT OH US,346.6,40.87306,-81.88667,20081104,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,0.00, , ,W,9999,-9999, , , ,9999,-9999, , , ,9999,71, , ,W,9999,40, , ,W,9999,-9999, , , ,9999,1605, , ,W,9999,-9999, , , ,9999,-9999, , , ,9999,1, , ,W,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,1, , ,W,9999,-9999, , , ,9999,-9999, , , ,9999 
GHCND:USW00003954,OKLAHOMA CITY WILEY POST AIRPORT OK US,395.3,35.53417,-97.64694,20081104,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,0.00, , ,W,9999,-9999, , , ,9999,-9999, , , ,9999,77, , ,W,9999,57, , ,W,9999,-9999, , , ,9999,1531, , ,W,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999 
GHCND:USC00080737,BIG CYPRESS FL US,4.6,26.32833,-80.99583,20081104,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,0.00, , ,0,0800,0.0,P, ,0,9999,0.0,P, ,0,9999,82, , ,0,0800,65, , ,0,0800,65, , ,0,0800,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999 
GHCND:USR0000OBRI,BRER RABBIT OREGON OR US,1798.3,44.3231,-119.7669,20081104,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,31,H, ,U,9999,22,H, ,U,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999 
GHCND:USC00202381,EAST JORDAN MI US,178.3,45.1519,-85.1322,20081104,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,0.00, , ,0,1500,0.0, , ,0,1500,0.0, , ,0,9999,74, , ,0,1500,43, , ,0,1500,74, , ,0,1500,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,1, , ,0,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999 
GHCND:USR0000CKON,KONOCTI CALIFORNIA CA US,659.3,38.9119,-122.7064,20081104,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,49,H, ,U,9999,40,H, ,U,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999 
GHCND:USR0000MBLA,BLACKWATER MARYLAND MD US,426.7,38.4167,-76,20081104,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,61,H, ,U,9999,54,H, ,U,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999 
GHCND:USR0000WEST,ESTERBROOK WYOMING WY US,1990.3,42.4153,-105.3611,20081104,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,56,H, ,U,9999,32,H, ,U,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999 
GHCND:US1GAGW0006,BUFORD 4.6 ESE GA US,352.7,34.0799,-83.9313,20081104,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,0.00, , ,N,9999,-9999, , , ,9999,0.0, , ,N,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999 
GHCND:USC00111290,CARLYLE RESERVOIR IL US,152.7,38.63083,-89.36583,20081104,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,0.00, , ,0,0800,0.0,P, ,0,9999,0.0,P, ,0,9999,76, , ,0,0800,46, , ,0,0800,49, , ,0,0800,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999 
GHCND:USC00116661,PAW PAW 2 S IL US,289.6,41.71222,-88.99889,20081104,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,0.00, , ,0,0700,0.0, , ,0,9999,0.0, , ,0,9999,72, , ,0,0700,47, , ,0,0700,48, , ,0,0700,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999 
GHCND:USR0000MSUN,SUNKHAZE MEADOWS MAINE ME US,34.7,44.9031,-68.64,20081104,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,63,H, ,U,9999,35,H, ,U,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999 
GHCND:USR0000MAVA,AVA MISSOURI MO US,399.6,36.9431,-92.65,20081104,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,73,H, ,U,9999,44,H, ,U,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999 
GHCND:USR0000JEBF,EB FORSYTHE NEW JERSEY NJ US,396.2,39.5,-74.5,20081104,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,60,H, ,U,9999,51,H, ,U,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999 
GHCND:USR0000ADVK,DEVILS KNOB ARKANSAS AR US,640.1,35.6111,-93.3333,20081104,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,65,H, ,U,9999,54,H, ,U,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999 
GHCND:USC00228556,SUMRALL MS US,88.4,31.42222,-89.53861,20081104,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,0.00,P, ,0,0700,0.0,P, ,0,9999,0.0,P, ,0,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999 
GHCND:USR0000TDAY,DAYTON TEXAS TX US,30.5,30.105,-94.9314,20081104,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,79,H, ,U,9999,48,H, ,U,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999 
GHCND:USC00340292,ARDMORE OK US,268.2,34.17139,-97.12944,20081104,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,0.00, , ,0,0800,0.0,P, ,0,9999,0.0,P, ,0,9999,78, , ,0,0800,60, , ,0,0800,67, , ,0,0800,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999 
GHCND:US1PALN0003,ADAMSTOWN 2.5 SSE PA US,198.1,40.2055,-76.0509,20081104,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,0.00,T, ,N,9999,-9999, , , ,9999,0.0, , ,N,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999 
GHCND:USC00408522,SPARTA WASTEWATER PLANT TN US,310.9,35.9566,-85.4813,20081104,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,0.00, , ,0,0700,0.0,P, ,0,9999,0.0,P, ,0,9999,75, , ,0,0700,36, , ,0,0700,39, , ,0,0700,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999 
GHCND:USR0000WGOL,GOLD MOUNTAIN WASHINGTON WA US,1428.3,48.1806,-118.4636,20081104,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,33,H, ,U,9999,27,H, ,U,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999 
GHCND:US1FLAL0007,GAINESVILLE 8.1 SW FL US,36.9,29.5908,-82.4314,20081104,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,0.00, , ,N,9999,-9999, , , ,9999,0.0, , ,N,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999 
GHCND:USC00148341,VALLEY FALLS KS US,299.3,39.3033,-95.4861,20081104,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,0.00, , ,0,0700,0.0,P, ,0,0700,0.0,P, ,0,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999 
GHCND:USR0000IHAR,HARDIN RIDGE INDIANA IN US,228.6,39,-86.4228,20081104,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,76,H, ,U,9999,43,H, ,U,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999 
GHCND:USW00014742,BURLINGTON INTERNATIONAL AIRPORT VT US,100.6,44.46806,-73.15028,20081104,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,0.00, , ,0,2400,0.0, , ,0,9999,0.0, , ,0,9999,61, , ,0,2400,46, , ,0,2400,-9999, , , ,9999,941, , ,W,9999,-9999, , , ,9999,-9999, , , ,9999,1, , ,W,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,1, , ,W,9999,-9999, , , ,9999,-9999, , , ,9999 
GHCND:USR0000SWIT,WITHERBEE SOUTH CAROLINA SC US,18,33.1597,-79.8306,20081104,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,62,H, ,U,9999,59,H, ,U,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999 
GHCND:USC00367782,SALINA 3 W PA US,338,40.5101,-79.5459,20081104,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,0.00, , ,0,0700,0.0,P, ,0,0700,0.0,P, ,0,9999,69, , ,0,0700,43, , ,0,0700,44, , ,0,0700,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999 
GHCND:USR0000CANZ,ANZA CALIFORNIA CA US,1194.8,33.555,-116.673,20081104,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,53,H, ,U,9999,42,H, ,U,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999 
GHCND:US1KSEL0043,HAYS 5.4 SSW KS US,630.6,38.8129,-99.3735,20081104,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,0.00, , ,N,9999,-9999, , , ,9999,0.0, , ,N,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999 
GHCND:USR0000ATAL,TALLADEGA ALABAMA AL US,182.9,33.4411,-86.0811,20081104,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,76,H, ,U,9999,44,H, ,U,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999 
GHCND:USW00094985,MARSHFIELD MUNICIPAL AIRPORT WI US,382.5,44.63806,-90.1875,20081104,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,0.00, , ,W,9999,-9999, , , ,9999,-9999, , , ,9999,73, , ,W,9999,53, , ,W,9999,-9999, , , ,9999,1436, , ,W,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999 
GHCND:USR0000ISLA,SLATE CREEK IDAHO ID US,477.9,45.6333,-116.2833,20081104,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,51,H, ,U,9999,41,H, ,U,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999 
GHCND:USR0000MDRY,DRY BLOOD CREEK MONTANA MT US,914.4,47.2442,-108.3575,20081104,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,53,H, ,U,9999,38,H, ,U,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999 
GHCND:USC00134142,IOWA FALLS IA US,321.6,42.5188,-93.2536,20081104,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,0.00,P, ,0,0700,0.0,P, ,0,9999,0.0,P, ,0,9999,75, , ,0,0700,52, , ,0,0700,55, , ,0,0700,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999 
GHCND:USC00161565,CARVILLE 2 SW LA US,7.6,30.19806,-91.12556,20081104,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,0.00, , ,0,2400,0.0,P, ,0,9999,0.0,P, ,0,9999,77, , ,0,2400,51, , ,0,2400,58, , ,0,2400,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999 
GHCND:USR0000NSTO,STONYKILL NEW YORK NY US,61,41.5,-73.9,20081104,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,63,H, ,U,9999,40,H, ,U,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999 
GHCND:US1ALMD0040,HAMPTON COVE 0.5 NNW AL US,187.1,34.667,-86.485,20081104,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,0.00, , ,N,9999,-9999, , , ,9999,0.0, , ,N,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999 
GHCND:USC00421446,CITY CRK WATER PLANT UT US,1624.6,40.8397,-111.8313,20081104,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,0.62, , ,0,1600,1.0, , ,0,1600,1.3, , ,0,9999,52, , ,0,1600,32, , ,0,1600,40, , ,0,1600,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999,-9999, , , ,9999

來源

2016-05-17 Michael Guarino

+1

警告：** **從來沒有使用你的代碼進行數據文件的絕對路徑，它使代碼完全不能再生（在其他機器上，或者如果你改變了文件的位置，你甚至可以自己做）。相反，請按邏輯分組您的項目的數據並使用相對路徑。 –

+0

我不明白你爲什麼這麼懶。 'apply（file，2，function（x）{sum（abs（x）== 9999）}）'將計算每列中9999和-9999的數量。然後只是其中該值超過行數的一半的子集列。它是一個雙線... – Spacedman

+0

您的代碼無法工作。你可以'count < - 1'然後嘗試使用'count'就像一個函數：'meta < - count（file，i）'。那應該做什麼？ – Spacedman

回答

-1

這樣的事情應該有所幫助。

count9999 <- function(x) { 
    r1 <- sum(x == 9999)/length(x) 
    r2 <- sum(x == -9999)/length(x) 
    if (r1 > 0.5 | r2 > 0.5) { 
     return(FALSE) 
    } else { 
     return(TRUE) 
    } 
} 

file <- file[, apply(file, 2, count9999)]

來源

2016-05-17 15:30:41 sachinv

+0

這將刪除所有你不需要的列 – sachinv

2

假設你的數據是這樣的：

df <- data.frame(v1 = c(1,1,2,1,2,1), 
       v2 = c(9999, 1, 2, 1, 2, -9999), 
       v3 = c(9999, 1, -9999, 9999, 2, -9999))

你就可以刪除已經超過其是9999或者-9999與colSums值的一半的列：

df[ , colSums(abs(df) == 9999)/nrow(df) < 0.5]

或與colMeans：

df[ , colMeans(abs(df) == 9999) < 0.5]

這兩個結果在去除v3 -column：

v1 v2 
1 1 9999 
2 1  1 
3 2  2 
4 1  1 
5 2  2 
6 1 -9999

來源

2016-05-17 15:52:46 Jaap

0 
# Some made up data... 

A<-as.integer(runif(10,1,40)) 
B<-as.integer(runif(10,1,40)) 
C<-as.integer(runif(10,1,40)) 
D<-as.integer(runif(10,1,40)) 
E<-as.integer(runif(10,1,40)) 
rlist<-data.frame(A,B,C,D,E) 
rlist$A[rlist$A %% 2 == 0]=9999 
rlist$C[rlist$C %% 2 == 0]= -9999 
rlist$E[rlist$E %% 2 == 0]=9999 

print(rlist) 

#Now make "-9999" and "9999" into NA's 

rlist[rlist[,]==9999|rlist[,]==-9999]<-NA 

print(rlist) 

#Now we need a function to figure out if >50% of a list is NA 
is.most.NA<-function(x){ 
    mean(is.na(x))<=.5 
    } 

#Now apply the function to the columns 

rlist[,apply(rlist,2,is.most.NA)]

來源

2016-05-17 16:11:34 SeldomSeenSlim

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