使用R的热图

Question

我试图通过从csv文件中读取数据来绘制矩阵的热图。 以下是代码的外观：

lda <- read.csv('topic_word_matrix.data',sep=",")
row.names(lda) <- lda$topics
lda <- lda[,2:ncol(lda)]
lda_matrix <- data.matrix(lda)
lda_heatmap <- heatmap(lda_matrix, Rowv=NA, Colv=NA,col = cm.colors(256), scale="column", margins=c(5,10))

我的输入文件如下所示：

topics,jockin,limited,raining,magnetic,reallamarodom
topic9,0.0,0.0,0.00671140939597,0.0022271714922,0.00234192037471
topic2,0.1,0.0,0.02671140939597,0.0022271714922,0.00234192037471

我得到一个没有任何颜色的情节和以下警告信息：

Warning messages:
1: In min(x) : no non-missing arguments to min; returning Inf
2: In max(x) : no non-missing arguments to max; returning -Inf

有没有人知道可能出现的问题？

Answer 1

参数＆＃39; scale =＆＃34;列的错误结果＆＃34;＆＃39;。

您的列的标准偏差为0，因此缩放（均值/标准差）失败。 所以要么使用scale =＆＃34; row＆＃34;或scale =＆＃34; none＆＃34;或者想想为什么要扩展列。

HTH