I would like to read a vector of CSV files names as ffdf data frames and combine them into one big ffdf data frame. I have found solutions using other ...

I have a list of ffdf, it takes up about 76GB of RAM if it is loaded to RAM instead of using ff package. The following is their respective dim() > ...

I'm trying to use OHDSI:s version of the SelfControlledCaseSeries package, which utilizes the ff package to handle big data. But something is not work ...

I imported a big dataset (~6 million rows) to R using ffbase package that lists people enrolled in high school in Brazil. In principle, I have 2 colum ...

I am dealing with a large dataset of 3D imaging data that I have loaded in to R using ff(). Simple calls like getting an average array/"volume" bac ...

I'm trying to understand the way I can use the ff package to overcome the error while using kriging/ gaussian simulation. I don't know how to chang ...

I would like to subset an ffdf object by index, returning another ffdf object. The help file on subset.ffdf indicates that you can pass a range index ...

I am having trouble doing the following operations in a larger dataset. I wonder if there is a built in way to do it with either ff or ffdf. Example: ...

I would like to accomplish the following using ffdf: Merge on columns X and Y and closest Time and then merge on the closes column B. However,the proc ...

I'm using ff and ffbase libraries to manage a big csv file (~40Go and 275e6 observations). I'd like to split/partition this file according to one of i ...

I would like to log2 transform all numeric values in a ff object from ffpackage. Using my df: I tried the below code but I got an error: There ...

I have 2 relatively large data frames in R. I'm attempting to merge / find all combos, as efficiently as possible. The resulting df turns out to be hu ...

I've tried to add a Source column to my ffdf, but can't seem to get it to work... if it was a normal df I would simply write If I do this for the ...

In the post below, aggregation using ffdfdply function in R There is a line like this. Just out of curiosity, I wonder what by argument means. It ...

From documentation of save.ffdf: Using ‘save.ffdf’ automagically sets the ‘finalizer’s of the ‘ff’ vectors to ‘"close"’. This means that the data ...

I have a large (23 Mln rows) ffdf table (tbl_ffdf) with 10 columns, 7 of them are factors and 3 contain numbers. It looks something like this: I'd ...

Could I easily drop column of ffdf object ? How to contain only Sepal.length and Species columns ? ...

Hi I am trying to remove duplicates from a ff vector that contains dates using the duplicated function of the ffbase package and the following code: ...

I am using dcast function to rshape datframe in R, but while using large dataframe. I converted that into ffdf dataframe unable to use dcast function ...

I am working with a ff dataset (final_faf_data) because of the size of my database. I am trying to create a new variable dpy which has only only one v ...