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Rating Stats for

Uwe

Rating
1496.72 (4,013,663rd)

Reputation
24,370 (5,280th)

Page: 1 ... 14 15 16 17 18 ... 24

Title	Δ
How to convert a long data frame to a wide data frame with duplicat...	-1.91
How to address the value in the next row	+1.29
merge two daily time series after summarising on shifted hours	+1.97
Find overlapping dates for each ID and create a new row for the ove...	+0.51
Appending a row of sums for each level of a factor	-0.58
How to separate a dataframe in order to plot separate histograms?	+0.89
Creating Dummy Variables by Date Range in R	0.00
Is there a string formatting operator in R similar to Python's %?	-1.03
Mutate column based on another data frame with multiple matches	+0.54
Efficiently convert a date column in data.table	+1.21
How to check previous row value with present row value in dataframe	-0.88
Why are my functions on lubridate dates so slow?	+0.04
How to append group row into dataframe	-1.64
Count the number of unique dates per ID between 2 dates, conditiona...	+1.25
dplyr dynamically generate column to mutate	-0.51
How to collapse a categorical variable into less elements in R	-0.79
Nested reshape from wide to long	0.00
Separate Date and time with " (String.Format)" in R?	-2.04
Merging Daily and Periodic Data into one Dataframe	+0.50
Converting a vector to factor in R and keeping undeclared levels	-0.58
Converting date and time with POSIX	+0.52
Replacing values in one column after matching values from another c...	-0.03
Converting time intervals into time/person matrix	0.00
Coerce variables in data frame to appropriate format	+0.50
Fill up missing values using the other data?	+0.51
Combining vectors in a subset of list of lists	+1.36
How to compute quantiles on groups	-1.74
How can I merge a single column from one file to another file	-0.12
Variable change over time based on event in R	+0.33
Assign multiple ID to name	-1.37
How to replace an NA with an equivalent value from elsewhere in a d...	+0.55
Index the first and the last rows with NA in a dataframe	0.00
How to return the last value in a vector that met a certain condition	-0.11
Replicate a row as many times to a dataframe when one specific valu...	-0.01
Optimising data.table code for slicing and computation	0.00
How to filter by dates and grouping months together in R using dplyr	+0.17
group_by() and summarise() with all combinations (including non-exi...	-0.25
Calculate factors across columns in R	-0.50
Function naming for R packages	0.00
How to convert the values in a dataframe to a dummy values by level...	-0.11
Complex sum function by grouping two variables within a dataframe i...	0.00
Calculate number of distinct instances occurring in a given time pe...	0.00
How to add dummy variables Q1, Q2, Q3 based on the month of Date va...	+0.76
How to count the number of orders placed before each date by customer	+2.01
How to look up values from a table and insert name of the lookup-li...	+0.48
How to aggregate data in data.frame in R	-1.50
Grouping and dividing between the columns	0.00
Delete rows without a full year data	+0.51
how to create variable name within a for loop	0.00
reshaping duplicate rows as column headers	-1.79