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rafa.pereira

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1490.79 (4,403,122nd) 		Reputation
6,121 (26,630th)
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Title Δ
How to calculate hours between two as.characters with the format &q... -1.52
Create new column based on partial match with another column +2.00
Extracting a table from a spreadsheet given a certain condition 0.00
How to generate shapefiles for H3 hexagons in a particular area -1.63
How to find the nearest distance between two different data frames 0.00
Speed up R algorithm to calculate distance matrix for Hellinger dis... +0.00
r: subsetting with square brackets not working -0.49
Mapping points in a map 0.00
merging multiple .csv files into one - R +0.52
How can I reset rownames? -0.52
Create a variable based on time difference between dates on consecu... 0.00
merge datasets with conditions in r +0.48
Use aggregate function to calculate output in data frame -0.65
How to filter out data out of a dataset? -0.50
set missing values for multiple labelled variables -1.06
Reversing default scale gradient ggplot2 -1.84
How do I make my ggplot2 graph display the top 20 percent of the di... +0.01
Create a new column and values with ifelse function -0.24
Subset around values that follow a pattern -1.17
How to split a string into different variables? +0.20
Why decimal numbers for min and max in summary() -0.37
How to group a quantitative variable by a categorical variable in R... +4.07
convert column values into a single row by id -2.17
Replace values in data frame column with results of aggregate/cut +3.99
R, Merge data frames by column 0 +3.68
How to recode only selected columns in R +0.53
How to plot a Complementary Cumulative Distribution Function (CCDF)... 0.00
Linking rows in a data frame 0.00
Remove rows that contain more than one string in a cell in a data f... -4.11
Use lapply for multiple regression with formula changing, not the d... 0.00
R speed up the for loop using apply() or lapply() or etc -2.08
Place strip text of facet_grid on the opposite side 0.00
Temporal distance matrix from dates +1.36
R: how to extend condition by group +4.56
How to retain only columns where a specific value is associated uni... +0.21
How to set several columns as the key in data.table package (r)? 0.00
How can I split a dataframe and run custom fuctions on it parallely? 0.00
Add the value of two lines and create a new line +4.31
Replacing Missing Value in R +0.44
Need to speed up my distance function in R 0.00
R looping through 20 million rows 0.00
adding vertical line to ggplot bar plot -2.80
Sum Groups of Observations in R Data Frame (Group by similar values) -3.23
Assign deciles to distribution -3.99
Creating a new column using ddply in the R package "plyr" +0.11
Multiplying column names/factors by each row -2.14
How to create different data frames to store data while running for... 0.00
Measure distance between pairs of latitude and longitude of co-ordi... -1.84
Extract Month and Year From Date in R +4.06
R: subsetting issue with some datatables when using column value/po... -4.01