错误“参数意味着不同的行数:x，y"是什么?意思是? [英] What does the error "arguments imply differing number of rows: x, y" mean?

问题描述

我正在尝试从 csv 文件的元素创建一个图，如下所示:

I'm trying to create a plot from elements of csv file which looks like this:

h1,h2,h3,h4
a,1,0,1,0
b,1,1,0,1
c,0,0,1,0

我尝试了以下代码，但收到一条错误消息

I tried the following code but am receiving an error saying

data.frame 中的错误(id =品种，attr(mat，row.names")，check.rows = FALSE):参数意味着不同的行数:8, 20

Error in data.frame(id = varieties, attr(mat, "row.names"), check.rows = FALSE) : arguments imply differing number of rows: 8, 20

我的示例数据有 8 列和 20 行(不包括标题和行名称).我尝试在线查找并尝试实施一些修复，但问题仍然存在.我真的很感激任何帮助.

My sample data has 8 columns and 20 rows (excluding header and row names). I tried to look up online and tried to implement a few fixes but the issue still persists. I'd really appreciate any help.

mat <- read.csv("trial.csv", header=T, row.names=1)
varieties = names(mat)
df <- data.frame(id=varieties,attr(mat, "row.names"), check.rows= FALSE)

推荐答案

你的 data.frame mat 是矩形的 (n_rows!= n_cols).

Your data.frame mat is rectangular (n_rows!= n_cols).

因此，您不能从列名和行名中创建 data.frame，因为 data.frame 中的每一列都必须具有相同的长度.

Therefore, you cannot make a data.frame out of the column- and rownames, because each column in a data.frame must be the same length.

也许这足以满足您的需求:

Maybe this suffices your needs:

require(reshape2)
mat$id <- rownames(mat) 
melt(mat)

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