Question

使用R中的'heatmap（）'函数生成热图后，有没有办法聚焦并提取特定群集的成员？

我有一个4500 x 420成员的热图，它会很有用。

感谢。

Answer 1

指定keep.dendro = TRUE，您应该在Rowv和Colv的列表元素下提供数据。

这是?heatmap。

稍加修改的示例

require(graphics); require(grDevices)
x  <- as.matrix(mtcars)
rc <- rainbow(nrow(x), start = 0, end = .3)
cc <- rainbow(ncol(x), start = 0, end = .3)
hv <- heatmap(x, col = cm.colors(256), scale = "column",
              RowSideColors = rc, ColSideColors = cc, margins = c(5,10),
              xlab = "specification variables", ylab =  "Car Models",
              main = "heatmap(<Mtcars data>, ..., scale = \"column\")",
              keep.dendro = TRUE)

hv$Rowv
'dendrogram' with 2 branches and 32 members total, at height 425.3447

修改的

如果你想要小组成员，你需要先砍树。

cutree(as.hclust(hv$Rowv), h = 200)

          Mazda RX4       Mazda RX4 Wag          Datsun 710      Hornet 4 Drive   Hornet Sportabout             Valiant 
                  1                   1                   1                   2                   3                   2 
         Duster 360           Merc 240D            Merc 230            Merc 280           Merc 280C          Merc 450SE 
                  3                   1                   1                   1                   1                   2 
         Merc 450SL         Merc 450SLC  Cadillac Fleetwood Lincoln Continental   Chrysler Imperial            Fiat 128 
                  2                   2                   3                   3                   3                   1 
        Honda Civic      Toyota Corolla       Toyota Corona    Dodge Challenger         AMC Javelin          Camaro Z28 
                  1                   1                   1                   2                   2                   3 
   Pontiac Firebird           Fiat X1-9       Porsche 914-2        Lotus Europa      Ford Pantera L        Ferrari Dino 
                  3                   1                   1                   1                   3                   1 
      Maserati Bora          Volvo 142E 
                  4                   1

获取heatmap（）函数R的特定成员的名称

1 个答案: