rbind_all.columns: Function to stack two data frames and keep all the columns

In CambridgeAssessmentResearch/unimirt: Applications of Unidimensional IRT using the R Package 'mirt'

Function to stack two data frames and keep all the columns

Description

This function is essentially a wrapper for the base function rbind. It takes two data.frames as an input. Before attempting to stack them using rbind it (internally) adds any column names that occur in the other data frame. This avoids errors. This function is included in this package as it may be useful as a precursor to concurrent calibration of two data sets of items using different data.

Usage

rbind_all.columns(x, y)

Arguments

x	A data frame.
y	A data frame.

Examples

dat1=mathsdata[1:100,1:10]#a sample who did items 1:10
dat2=mathsdata[101:200,6:15]#a different group who did 6:15
alldat=rbind_all.columns(dat1,dat2)#combine the data
summary(alldat)
allmirt=unimirt(alldat,"2")#fit an IRT model on combined data

CambridgeAssessmentResearch/unimirt documentation built on June 10, 2025, 6:03 a.m.