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Ferdinand.kraft

Rating
1514.88 (45,658th)
Reputation
9,981 (15,306th)
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Title Δ
X Y Plot with R +0.61
SELECT statement from two dataframes using RMySQL 0.00
alternative to sapply over strsplit of character vector +2.14
Changing columns positions in a data frame without total reassignment -0.83
Loop a function over multiple datasets and multiple columns within... 0.00
Looping within a loop in R 0.00
An efficient way of converting a vector of characters into integers... +0.11
How should I apply the same formatting to a list of dataframes in R? 0.00
Remove variables with factor level 1 +0.10
How to detect sequential event change properly in R data frame +0.41
How to add a new column with values based on numeric value conditio... -1.82
How to loop over list of list and access a row by name using R (pre... +2.23
subsetting and performing calculations on time series data, avoidin... +0.51
Selecting R matrix values by blocks -0.19
R apply function to multiple columns +0.01
R: ifelse on string +0.18
how to define a flexible 'function expression' in R -1.86
ifelse matching vectors in r -1.80
R Large Matrix Size differences 0.00
Detach several packages at once +0.41
Functional programming in R : illustration with vandermonde matrix -1.07
Match multiple columns in dataframe from different sources 0.00
Combine similar rows across two data frames -0.02
apply different functions to different elements of a vector in R 0.00
Genetic Algorithm Optimization 0.00
Add column of ranks with mean/average tied ranks 0.00
copy result of unique() string vector in a dataframe R 0.00
how to sort a column in a table in r 0.00
Splitting dataframe into equal number of groups, differing row sizes -0.93
R remove duplicate elements in character vector, not duplicate rows +0.25
R select rows in matrix from another vector (match, %in) 0.00
Return the Sum and then Divide a Column in R -0.55
constructing an identifier string for each row in data -1.79
R igraph rename vertices -3.85
Applying Function Using Different Columns - R +4.00
Replace values of a data frame based on specific crietria in R +3.69
R subsetting data and handling null findings -4.18
R how to examine kmeans model for use 0.00
alternative to a for loop for replacing a subset of elements in a m... +0.22
Transpose data by groups in R +2.06
Plotting clusters of nominal data in R -3.37
Want to assign the value of a dummy variable at one time in R -2.93
Write a R function GroupSummary(x) that will display the five-numbe... +2.00
Apply a correction factor to one column based on the value of a sec... +4.16
get a subset of a dataframe by sampling for each value in a column -3.75
How to do vectorized summations in an exponent and apply it to a wh... 0.00
Search for the same term in mutliple dataframes 0.00
R: how to print table with multiple arguments 0.00
How to vectorize this process in R? +0.22
R remove redundant parentheses from formula string or expression +5.28