Question

如何通过Tree.Species Compartment，Stand，Transect和Plot对DBH和Basal区域求和？

Tree.Species    DBH  Basal Area   Compartment   Stand   Transect Plot 
Sugar Maple     16.4    211.1336    107           20        2       3
Sugar Maple     25.1    494.55785   107           20        2       3 
Hemlock         15.1    178.98785   209           30        1       2

我在尝试：

aggregate(.~ Compartment + Stand + Transect + Plot + Tree.Speices, data = Trees, FUN = sum)

但我一直收到这个错误：

Error in model.frame.default(formula = cbind(DBH, Basal.Area, Transect..,  : 
  variable lengths differ (found for 'Transect')

我的变量是唯一值，并且数据中没有所有可能的组合。

Compartment: 107 209 310 231
Stand: 20 110  30 240  80 300
Transect: 1 2 3
Plot: 1 2 3 4 5 6

dput：

structure(list(Tree.Speices = structure(c(53L, 49L, 49L, 49L, 
49L, 11L, 49L, 12L, 49L, 4L, 49L, 49L, 49L, 53L, 49L, 49L, 4L, 
4L, 33L, 4L, 11L, 53L, 11L, 53L, 53L, 21L, 21L, 53L, 49L, 53L, 
49L, 49L, 53L, 21L, 4L, 4L, 49L, 12L, 21L, 49L, 49L, 49L, 49L, 
9L, 49L, 49L, 11L, 11L, 53L, 47L, 33L, 11L, 5L, 49L, 11L, 11L, 
38L, 11L, 49L, 11L, 11L, 11L, 11L, 49L, 53L, 53L, 53L, 47L, 49L, 
49L, 49L, 47L, 49L, 33L, 4L, 4L, 47L, 4L, 11L, 49L, 53L, 49L, 
11L, 11L, 11L, 49L, 11L, 11L, 11L, 11L, 11L, 49L, 11L, 49L, 47L, 
49L, 11L, 11L, 11L, 11L, 21L), .Label = c("American Elm", "Aspen", 
"Balsam", "Basswood", "Beech", "Big-Toothed Aspen", "Black Cherry", 
"Cedar", "Cottonwood", "Elm", "Hemlock", "Hop Hornbeam", "paper birch", 
"Paper Birch", "Poplar", "Quaking Aspen", "Red Maple", "Red Oak", 
"Red Spruce", "snag", "Snag", "Snag (Aspen)", "Snag (Basswood)", 
"Snag (Beech)", "Snag (Big-Toothed Aspen)", "SNAG (Big-Toothed Aspen)", 
"snag (conifer)", "Snag (Conifer)", "Snag (Cottonwood)", "Snag (Elm)", 
"Snag (hardwood)", "snag (Hemlock)", "Snag (Hemlock)", "SNAG (Hemlock)", 
"Snag (maple)", "Snag (Maple)", "Snag (Oak)", "Snag (Paper Birch)", 
"Snag (Poplar)", "Snag (Red Maple)", "snag (Sugar Maple)", "Snag (Sugar Maple)", 
"Snag (Sugar)", "Snag (White Ash)", "Snag (White Pine)", "snag (Yellow Birch)", 
"Snag (Yellow Birch)", "SNAG (Yellow Birch)", "Sugar Maple", 
"White Ash", "White Birch", "White Pine", "Yellow Birch"), class = "factor"), 
    DBH = c(55.7, 21.3, 14, 38, 6.5, 20.3, 33.2, 6.3, 30.5, 22.3, 
    32.7, 8.9, 41.8, 30, 24.6, 13.8, 56.6, 49.5, 49.9, 63.2, 
    28, 39, 21, 25.7, 29.9, 38, 17.5, 22.4, 6.2, 20.3, 18.3, 
    21, 24.7, 49.5, 6.4, 30.3, 19.4, 6, 37.8, 24.6, 24.4, 9.5, 
    17.4, 49.2, 26, 31, 23.6, 19.8, 37.9, 25.8, 31.5, 18.1, 34.4, 
    59.7, 28.2, 21, 16.4, 23.7, 34.4, 24.7, 15.4, 12, 24.2, 34.2, 
    19.4, 15.1, 34.9, 34.8, 6.6, 61.2, 25.4, 38.8, 28.9, 32.3, 
    43.9, 33.8, 27.1, 37, 21.2, 26.4, 27.4, 10.6, 55.1, 69.4, 
    24, 25.4, 51, 20.2, 14.3, 31.8, 48.8, 38.3, 19.6, 26.3, 34.5, 
    6.3, 41.3, 32.6, 14.6, 9.1, 57.8), Basal.Area = c(2435.45465, 
    356.14665, 153.86, 1133.54, 33.16625, 323.49065, 865.2584, 
    31.15665, 730.24625, 390.37265, 839.39265, 62.17985, 1371.5834, 
    706.5, 475.0506, 149.4954, 2514.7946, 1923.44625, 1954.65785, 
    3135.4784, 615.44, 1193.985, 346.185, 518.48465, 701.79785, 
    1133.54, 240.40625, 393.8816, 30.1754, 323.49065, 262.88865, 
    346.185, 478.92065, 1923.44625, 32.1536, 720.70065, 295.4426, 
    28.26, 1121.6394, 475.0506, 467.3576, 70.84625, 237.6666, 
    1900.2024, 530.66, 754.385, 437.2136, 307.7514, 1127.58185, 
    522.5274, 778.91625, 257.17385, 928.9376, 2797.81065, 624.2634, 
    346.185, 211.1336, 440.92665, 928.9376, 478.92065, 186.1706, 
    113.04, 459.7274, 918.1674, 295.4426, 178.98785, 956.13785, 
    950.6664, 34.1946, 2940.1704, 506.4506, 1181.7704, 655.63985, 
    818.98265, 1512.85985, 896.8154, 576.51185, 1074.665, 352.8104, 
    547.1136, 589.3466, 88.2026, 2383.26785, 3780.8426, 452.16, 
    506.4506, 2041.785, 320.3114, 160.52465, 793.8234, 1869.4304, 
    1151.50865, 301.5656, 542.97665, 934.34625, 31.15665, 1338.96665, 
    834.2666, 167.3306, 65.00585, 2622.5594), Compartment = c(107L, 
    107L, 107L, 107L, 107L, 107L, 107L, 107L, 107L, 107L, 107L, 
    107L, 107L, 107L, 107L, 107L, 107L, 107L, 107L, 107L, 107L, 
    107L, 107L, 107L, 107L, 107L, 107L, 107L, 107L, 107L, 107L, 
    107L, 107L, 107L, 107L, 107L, 107L, 107L, 107L, 107L, 107L, 
    107L, 107L, 107L, 107L, 107L, 107L, 107L, 107L, 107L, 107L, 
    107L, 107L, 107L, 107L, 107L, 107L, 107L, 107L, 107L, 107L, 
    107L, 107L, 107L, 107L, 107L, 107L, 107L, 107L, 107L, 107L, 
    107L, 107L, 107L, 107L, 107L, 107L, 107L, 107L, 107L, 107L, 
    107L, 107L, 107L, 107L, 107L, 107L, 107L, 107L, 107L, 107L, 
    107L, 107L, 107L, 107L, 107L, 107L, 107L, 107L, 107L, 107L
    ), Stand = c(20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 
    20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 
    20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 
    20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 
    20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 
    20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 
    20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 
    20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 
    20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L), Transect.. = c(2L, 
    1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 
    1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 
    1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 
    1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 
    1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 
    1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 
    1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L), Plot.. = c(1L, 3L, 
    3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 
    3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 
    3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 2L, 
    2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 
    2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 
    2L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 
    1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L)), .Names = c("Tree.Speices", 
"DBH", "Basal.Area", "Compartment", "Stand", "Transect..", "Plot.."
), row.names = 67:167, class = "data.frame")

Answer 1

最后两个列的名称末尾有两个点，而且Species拼写错误：

> names(Trees)
[1] "Tree.Speices" "DBH"          "Basal.Area"   "Compartment"  "Stand"       
[6] "Transect.."   "Plot.."

尝试：

aggregate(.~ Compartment + Stand + Transect.. + Plot.. + Tree.Speices, 
   data = Trees, FUN = sum)

或删除所有名称末尾的点并更正拼写：

names(Trees) <- sub("\\.+$", "", names(Trees))
names(Trees) <- sub("Speices", "Species", names(Trees))
aggregate(.~ Compartment + Stand + Transect + Plot + Tree.Species, 
   data = Trees, FUN = sum)

R：基于多列的聚合

1 个答案: