无法绘制直方图,"x"必须为数字 [英] Can't draw Histogram, 'x' must be numeric
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问题描述
我有一个具有以下格式的数据文件:
I have a data file with this format:
Weight Industry Type
251,787 Kellogg h
253,9601 Kellogg a
256,0758 Kellogg h
....
我读取了数据并尝试使用以下命令绘制直方图:
I read the data and try to draw an histogram with this commands:
ce <- read.table("file.txt", header = TRUE)
we = ce[,1]
in = ce[,2]
ty = ce[,3]
hist(we)
但是我得到这个错误:
错误hist.default(we):"x"必须为数字.
Error en hist.default(we) : 'x' must be numeric.
要为三个变量绘制直方图,我需要做什么?
What do I need to do in order to draw histograms for my three variables ?
推荐答案
由于千位分隔符,数据将被读取为非数字".因此,您需要对其进行转换:
Because of the thousand separator, the data will have been read as 'non-numeric'. So you need to convert it:
we <- gsub(",", "", we) # remove comma
we <- as.numeric(we) # turn into numbers
现在您可以做
hist(we)
和其他数字运算.
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