dataframe
How to do row-wise subtraction and replace a specific number with zero?
Step 1:I have a simplified dataframe like this: df1 = data.frame (B=c(1,0,1), C=c(1,1,0) , D=c(1,0,1), E=c(1,1,0), F=c(0,0,1)[详细]
2023-04-09 05:32 分类:问答Change column name by looking up
I know that I can change a data.frame column name by: colnames(df)[3] <- \"newname\" But there might be cases where the column I want to change is not in the 3rd position. Is there a way to look[详细]
2023-04-09 01:25 分类:问答Understanding xyplot in R
I\'m an R newbie and I\'m trying to understand the xyplot function in lattice. I have a dataframe: df <- data.frame(Mean=as.vector(abc), Cycle=seq_len(nrow(abc)), Sample=rep(colnames(abc), each=[详细]
2023-04-08 18:53 分类:问答Identical data frames with different digests in R?
I have two large data frames, a and b for which identical(a,b) is TRUE, as is all.equal(a,b), but identical(digest(a),digest(b)) is FALSE.What could cause this?[详细]
2023-04-08 03:23 分类:问答Subsetting data frame using variable with same name as column
I have a data frame and I\'开发者_如何学Pythonm trying to run a subset on it. In my data frame, I have a column called \"start\" and I\'m trying to do this:[详细]
2023-04-07 19:51 分类:问答Change the index number of a dataframe
After I\'m done with some manipulation in Dataframe, I got a result dataframe. But the index are not listed properly as below.[详细]
2023-04-07 16:58 分类:问答Aggregate data in one column based on values in another column
I know there is an easy way to do this...but, I can\'t figure it out. I have a dataframe in my R script that looks something like this:[详细]
2023-04-07 12:42 分类:问答R Modifying a region of a matrix/data frame depending on another matrix/data frame
I have a question about modifying a matrix. I have managed to change values in a matrix depending on the value[详细]
2023-04-06 15:45 分类:问答Select multiple values from a dataframe using a matrix with indices
I have a for loop, which returns me values from one dataframe using which, which.min and which.max giving me the \"coordinates\". Here an example[详细]
2023-04-06 08:55 分类:问答Can one add a data.frame to itself?
I want to append or add a data.frame to itself... Much in the same way the one adds: n <- n + t I have a function that 开发者_如何学运维creates a data.frame.[详细]
2023-04-05 20:04 分类:问答