Vicente Masip created SPARK-18823:
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Summary: Assignation by column name variable not available or bug?
Key: SPARK-18823
URL: https://issues.apache.org/jira/browse/SPARK-18823
Project: Spark
Issue Type: Question
Components: SparkR
Affects Versions: 2.0.2
Environment: RStudio Server in EC2 Instances (EMR Service of AWS) Emr
4. Or databricks (community.cloud.databricks.com) .
Reporter: Vicente Masip
Fix For: 2.0.2
I really don't know if this is a bug or can be done with some function:
Sometimes is very important to assign something to a column which name has to
be access trough a variable. Normally, I have always used it with doble
brackets likes this out of SparkR problems:
# df could be faithful normal data frame or data table.
# accesing by variable name:
myname = "waiting"
df[[myname]] <- c(1:nrow(df))
# or even column number
df[[2]] <- df$eruptions
The error is not caused by the right side of the "<-" operator of assignment.
The problem is that I can't assign to a column name using a variable or column
number as I do in this examples out of spark. Doesn't matter if I am modifying
or creating column. Same problem.
I have also tried to use this with no results:
val df2 = withColumn(df,"tmp", df$eruptions)
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