[英]How to re-arrange/manipulate data?
I have a data set from a lab experiment.我有一个来自实验室实验的数据集。 The data is now in this form:
数据现在是这种形式:
ColumnID Soiltype Treatment Concentration1 Concentration2 Concentration3
1 Oh Control 29 31 34
2 LOf Treatment 100 99 94
3 Oh Treatment 80 83 78
How can I manipulate the data such that it looks like the following:如何操作数据,使其看起来如下所示:
ColumnID Soiltype Treatment Concentration
1 Oh Control 29
1 Oh Control 31
1 Oh Control 34
2 LOf Treatment 100
2 LOf Treatment 99
2 LOf Treatment 94
3 Oh Treatment 80
3 Oh Treatment 83
3 Oh Treatment 78
What can I try next?我接下来可以尝试什么?
This goes under the general category of reshaping data to long form (for your future google-fu reference):这属于将数据重塑为长格式的一般类别(供您将来的 google-fu 参考):
library(reshape2)
melt(df, id.var = c('ColumnID', 'Soiltype', 'Treatment'),
value.name = "Concentration")
# ColumnID Soiltype Treatment variable Concentration
#1 1 Oh Control Concentration1 29
#2 2 LOf Treatment Concentration1 100
#3 3 Oh Treatment Concentration1 80
#4 1 Oh Control Concentration2 31
#5 2 LOf Treatment Concentration2 99
#6 3 Oh Treatment Concentration2 83
#7 1 Oh Control Concentration3 34
#8 2 LOf Treatment Concentration3 94
#9 3 Oh Treatment Concentration3 78
Removal of extra columns and ordering is left to the reader.删除额外的列和排序留给读者。
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