r dataframe filter endswith

R DataFrame Filter endswith

  1. Create a Sample DataFrame:

  2. We will create a sample dataframe using the following code: R set.seed(1) df <- data.frame( ABC_1 = sample(0:1,3,repl = TRUE), ABC_2 = sample(0:1,3,repl = TRUE), XYZ_1 = sample(0:1,3,repl = TRUE), XYZ_2 = sample(0:1,3,repl = TRUE) )

  3. Filter Columns Ending with "ABC":

  4. We will filter the dataframe to contain only columns whose names end with "ABC" using the following code: R df1 <- df[ , grepl( "ABC" , names( df ) ) ]

  5. Subset Data Based on Condition:

  6. Next, we will subset the data to discard rows where all "ABC" values are 0: R ind <- apply( df1 , 1 , function(x) any( x > 0 ) ) df1[ ind , ]

Explanation of Steps

  1. We start by creating a sample dataframe using the data.frame function and populating it with random values using sample and set.seed functions. [5]

  2. We then use the grepl function to filter the dataframe to contain only columns whose names end with "ABC". This is achieved by using the pattern "ABC" in the grepl function.

  3. Finally, we subset the data based on a condition using the apply function to check if any "ABC" value in each row is greater than 0. If the condition is met, the row is retained; otherwise, it is discarded.

I hope this helps!