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Ernest A

Rating
1500.64 (436,306th) 		Reputation
4,624 (35,990th)
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Title Δ
Summing a dataframe with lapply -0.50
I need help transforming a table to a matrix 0.00
Are these strings or variables? -0.77
aggregate on more than one variable at a time using loop and/or app... -0.01
How does R know to use a function, if that functions name has been... +0.49
Find the difference of every rows pair of the same data.frame +1.74
How to sum a matrix cell value into another by row/colum names? +0.49
dataframe - accessing the previous row +0.02
Collapse multiple columns into single row with maximum value from e... -0.02
Behavior of identical() in apply in R 0.00
Breaking Up Rows With Intervals Spanning over an hour / Issues with... 0.00
How to filter all rows of a dataframe that matches two criteria of... -0.01
computing percentiles in a nested list and output in a dataframe in R -2.16
Nested apply in R +0.48
Calculating cumulative mean using floating conditions -0.49
Loop over columns of data frame and populate another column if cond... 0.00
Sum two dataframes with NA values and factors -0.15
R: accented characters in data frame +0.50
adding strip to single dotplot from lattice package 0.00
Lazy evaluation example with NULL in Advanced R 0.00
I want to run a t-test, how should I organise my data to do so? +0.46
Is there a concise way to specify an element name with a variable w... 0.00
Faster method of counting specified values from rows in large matri... +0.05
Provide rownumbers while conditionally restart counting +0.79
How to use minus/set complement operator correctly in R? -0.31
Efficient code to search for a string in another string based on mu... -0.06
Singular value decomposition in R - limited number of singular valu... 0.00
List of list of matrix to dataframe -4.22
Trying to build a large table in R 0.00
R: convert data.frame to data.frame with correct dimensions +4.02
How to retrieve data frame columns by evaluating formula components? 0.00
List all combinations of strings that together cover all given elem... +3.98
How to change the n consequence number of values in dataframe varia... 0.00
Calculating accuracy from two columns in R, creating summary table 0.00
How to extract the colnames which the largest three numbers in ever... -0.07
Creating an unevaluated function call with unevaluated but changing... 0.00
Apply function not working in R 0.00
How to deal with the object class conversion in a for loop -3.96
How to split a "formula" in R -0.36
Loop through every ith row of a matrix j times more efficiently in R 0.00
maximal number of identical elements between any two columns of a m... +0.76
Creating pairs from Group Membership Data 0.00
how to remove rows based on different crateria in one run -0.56
Matching alternating date and price columns into a single table for... -4.16
R function values without default that are ignored +0.98
R - sample used in %in% modify dataframe which is being subsetted -3.33
find number sequence falls within ONE adjacent number (previous and... +1.39
Compare only pairwise comparisons BETWEEN two matrices using rcorr(... 0.00
Repeated subsetting and arithmetic of dataset based on second dataf... 0.00
How to build a matrix from a dataframe based on the values of a spe... 0.00