1

我正在使用somkohonen 包中的函数,并以本教程为指导。

som_model <- som(t(data_train_matrix), 
             grid=som_grid, 
             rlen=1, 
             alpha=c(0.05,0.01), 
             keep.data = TRUE,
             n.hood= "circular")
plot(som_model, type="count")

我有一个 31×1400 的数据,但是当我尝试读取计数图时,它与相同数量的样本 (31) 不匹配。我得到的情节给了我大约 100 个样本。

这是我的数据示例

structure(c(-8691, 96233, 94318, 19206, 139453, 135652, 47782, 
56190, -63139, 161452, 83268, 194879, -4112, 193153, -55742, 
168244, -26043, 171304, 67181, -52147, -45487, 77098, 79648, 
123380, -52991, 113980, -35812, 161776, -26874, 125046, 89662, 
94537, 68053, 59601, 87972, 8844, 82108, 85343, 145252, 130751, 
66224, 32792, 101576, 174156, 37090, 102740, 101521, 154264, 
28431, 81740, 113085, 104153, 6385, 95860, 67247, 58344, 106147, 
225375, -714, 212145, 51164, 24108, 33896, 128937, 182192, 5715, 
94954, 198818, 127890, 272457, -45888, 96562, 15617, 22385, 102185, 
154694, 93797, 55638, 118959, 184010, 6310, 54728, 141369, 209807, 
140799, 100809, 93704, 198260, 264015, 271577, 90354, 125713, 
112490, 103888, 186512, 178664, 30646, 100788, 194517, 197307, 
-3709, 111675, 175022, 186898, 242656, 107932, 269935, 110129, 
38492, 88179, 35392, 81003, 118482, 124713, 124830, 78896, 79962, 
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4

1 回答 1

0

图中项目(样本)较少的原因是对kohonen足够相似的项目进行聚类。考虑包中的数据集 wines。它有 177 种葡萄酒的 13 个变量,但计数图显示 25 个聚类。它还通过颜色渐变显示每个集群中有多少葡萄酒。

library(kohonen)
data(wines)
kohmap <- xyf(scale(wines), classvec2classmat(wine.classes),
              grid = somgrid(5, 5, "hexagonal"), rlen=100)

plot(kohmap, type="counts", labels = wine.classes, col = wine.classes + 1, main = "count plot")

聚类后​​ 25 项 177

于 2015-05-23T11:18:44.783 回答