search for: dfrmname

Good Afternoon R Community, I often work with very large data bases and want to search for select cases by a particular word or numeric value. I created the following simple function to do just that. It searchs a particular column for the phrase and returns a data frame with the rows that contain that phrase (for a particular column). Search<-function(term, dataframe, column.name,

Hi list I need some help for drawing some histograms I have a dataframe , say, X Y Z T I want to draw a histogram Z-T for each value of the couple (X-Y). When I use thus syntax > library(lattice) > histogram(law[,3] ~ law[,66] | law[,1] ) it draws multiple histograms but by selecting distinct values of law[,1] The deal is to make the same thing but for a couple of columns Thanks in