Description Usage Format Source References Examples
The six DIY stores in a German research area, their corresponding DIY chain and sales area.
1 | data("DIY2")
|
A data frame with 6 observations on the following 3 variables.
j_destination
a factor with six levels representing the DIY stores
j_chain
a factor with five levels containing the store chain
A_j_salesarea_sqm
a numeric vector for the sales area of the DIY stores in sqm
Wieland, T. (2015): “Raeumliches Einkaufsverhalten und Standortpolitik im Einzelhandel unter Beruecksichtigung von Agglomerationseffekten. Theoretische Erklaerungsansaetze, modellanalytische Zugaenge und eine empirisch-oekonometrische Marktgebietsanalyse anhand eines Fallbeispiels aus dem laendlichen Raum Ostwestfalens/Suedniedersachsens”. Geographische Handelsforschung, 23. 289 pages. Mannheim : MetaGIS.
Wieland, T. (2015): “Raeumliches Einkaufsverhalten und Standortpolitik im Einzelhandel unter Beruecksichtigung von Agglomerationseffekten. Theoretische Erklaerungsansaetze, modellanalytische Zugaenge und eine empirisch-oekonometrische Marktgebietsanalyse anhand eines Fallbeispiels aus dem laendlichen Raum Ostwestfalens/Suedniedersachsens”. Geographische Handelsforschung, 23. 289 pages. Mannheim : MetaGIS.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | data(DIY1)
data(DIY2)
data(DIY3)
# Loading the three DIY store datasets
DIY_alldata <- merge (DIY1, DIY2, by.x = "j_destination", by.y = "j_destination")
# Add store data to distance matrix
huff_DIY <- huff.shares (DIY_alldata, "i_origin", "j_destination", "A_j_salesarea_sqm",
"t_ij_min", gamma = 1, lambda = -2)
# Calculating Huff local market shares
# Gamma = 1, Lambda = -2
huff_DIY <- merge (huff_DIY, DIY3, by.x = "i_origin", by.y = "district")
# Add data for origins
huff_DIY_total <- shares.total (huff_DIY, "i_origin", "j_destination", "p_ij",
"population")
# Calculating total market areas (=sums of customers)
colnames(DIY3) <- c("district", "pop")
# Change column name to "pop" (must be other name)
huff.lambda (huff_DIY, "i_origin", "j_destination", "A_j_salesarea_sqm",
"t_ij_min", gamma = 1, atype = "pow", gamma2 = NULL,
lambda_startv = -1, lambda_endv = -2.5, dtype= "pow",
DIY3, "district", "pop", huff_DIY_total, "suppliers_single", "sum_E_j",
method = "bisection", iterations = 10)
# Iterative search for the best lambda value using bisection
# Output: gamma and lambda
huff.lambda (huff_DIY, "i_origin", "j_destination", "A_j_salesarea_sqm",
"t_ij_min", gamma = 1, atype = "pow", gamma2 = NULL,
lambda_startv = -1, lambda_endv = -2.5, dtype= "pow",
DIY3, "district", "pop", huff_DIY_total, "suppliers_single", "sum_E_j",
method = "bisection", iterations = 10, output = "iterations", show_proc = TRUE)
# Same procedure, output: single iterations
huff.lambda (huff_DIY, "i_origin", "j_destination", "A_j_salesarea_sqm",
"t_ij_min", gamma = 1, atype = "pow", gamma2 = NULL,
lambda_startv = -1, lambda_endv = -2.5, dtype= "pow",
DIY3, "district", "pop", huff_DIY_total, "suppliers_single", "sum_E_j",
method = "compare", iterations = 10, output = "iterations", show_proc = TRUE, plotVal = TRUE)
# Using compare method, output: single iterations and plot
|
$gamma
[1] 1
$lambda
[1] -2.000488
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Iteration Lambda
1 1 -1.750000
2 2 -2.125000
3 3 -1.937500
4 4 -2.031250
5 5 -1.984375
6 6 -2.007812
7 7 -1.996094
8 8 -2.001953
9 9 -1.999023
10 10 -2.000488
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Iteration Lambda
1 1 -1.00
2 2 -1.01
3 3 -1.02
4 4 -1.03
5 5 -1.04
6 6 -1.05
7 7 -1.06
8 8 -1.07
9 9 -1.08
10 10 -1.09
11 11 -1.10
12 12 -1.11
13 13 -1.12
14 14 -1.13
15 15 -1.14
16 16 -1.15
17 17 -1.16
18 18 -1.17
19 19 -1.18
20 20 -1.19
21 21 -1.20
22 22 -1.21
23 23 -1.22
24 24 -1.23
25 25 -1.24
26 26 -1.25
27 27 -1.26
28 28 -1.27
29 29 -1.28
30 30 -1.29
31 31 -1.30
32 32 -1.31
33 33 -1.32
34 34 -1.33
35 35 -1.34
36 36 -1.35
37 37 -1.36
38 38 -1.37
39 39 -1.38
40 40 -1.39
41 41 -1.40
42 42 -1.41
43 43 -1.42
44 44 -1.43
45 45 -1.44
46 46 -1.45
47 47 -1.46
48 48 -1.47
49 49 -1.48
50 50 -1.49
51 51 -1.50
52 52 -1.51
53 53 -1.52
54 54 -1.53
55 55 -1.54
56 56 -1.55
57 57 -1.56
58 58 -1.57
59 59 -1.58
60 60 -1.59
61 61 -1.60
62 62 -1.61
63 63 -1.62
64 64 -1.63
65 65 -1.64
66 66 -1.65
67 67 -1.66
68 68 -1.67
69 69 -1.68
70 70 -1.69
71 71 -1.70
72 72 -1.71
73 73 -1.72
74 74 -1.73
75 75 -1.74
76 76 -1.75
77 77 -1.76
78 78 -1.77
79 79 -1.78
80 80 -1.79
81 81 -1.80
82 82 -1.81
83 83 -1.82
84 84 -1.83
85 85 -1.84
86 86 -1.85
87 87 -1.86
88 88 -1.87
89 89 -1.88
90 90 -1.89
91 91 -1.90
92 92 -1.91
93 93 -1.92
94 94 -1.93
95 95 -1.94
96 96 -1.95
97 97 -1.96
98 98 -1.97
99 99 -1.98
100 100 -1.99
101 101 -2.00
102 102 -2.01
103 103 -2.02
104 104 -2.03
105 105 -2.04
106 106 -2.05
107 107 -2.06
108 108 -2.07
109 109 -2.08
110 110 -2.09
111 111 -2.10
112 112 -2.11
113 113 -2.12
114 114 -2.13
115 115 -2.14
116 116 -2.15
117 117 -2.16
118 118 -2.17
119 119 -2.18
120 120 -2.19
121 121 -2.20
122 122 -2.21
123 123 -2.22
124 124 -2.23
125 125 -2.24
126 126 -2.25
127 127 -2.26
128 128 -2.27
129 129 -2.28
130 130 -2.29
131 131 -2.30
132 132 -2.31
133 133 -2.32
134 134 -2.33
135 135 -2.34
136 136 -2.35
137 137 -2.36
138 138 -2.37
139 139 -2.38
140 140 -2.39
141 141 -2.40
142 142 -2.41
143 143 -2.42
144 144 -2.43
145 145 -2.44
146 146 -2.45
147 147 -2.46
148 148 -2.47
149 149 -2.48
150 150 -2.49
151 151 -2.50
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