### Logistic Regression on factor: Error in eval(family$initialize) : y values must be 0 <= y <= 1?

Not able to fix the below error for the below logistic regression training=(IBM$Serial<625) data=IBM[!training,]...

### Plotting with ggplot2: “Error: Discrete value supplied to continuous scale” on categorical y-axis?

The plotting code below gives Error: Discrete value supplied to continuous scale What's wrong with this code? It wo...

### Colouring plot by factor in R?

I am making a scatter plot of two variables and would like to colour the points by a factor variable. Here is some r...

### Concatenate rows of a data frame?

I would like to take a data frame with characters and numbers, and concatenate all of the elements of the each row i...

### Why use as.factor() instead of just factor()?

I recently saw Matt Dowle write some code with as.factor(), specifically for (col in names_factors) set(dt, j=col, ...

### Drop unused factor levels in a subsetted data frame?

I have a data frame containing a factor. When I create a subset of this dataframe using subset or another indexing f...

### Rename one level of a factor in R?

I'm attempting to rename the level A of factor column1 in the dataframe df in R. My current approach is this: level...

### How to fill NAs with LOCF by factors in data frame, split by country?

I have the following data frame (simplified) with the country variable as a factor and the value variable has missin...