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dimitris_ps

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1482.55 (4,485,643rd)
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3,824 (43,881st)
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Title Δ
Removing columns from a data.table using dplyr 0.00
Retrieve the most repeated (x, y) values in two columns in a data f... -2.34
I want to give same number to the duplicate data in excel 0.00
Length of location sequence (given as a string) in R +2.40
R: subsetting based on overlap of multiple files 0.00
r substring wildcard search to find text -0.31
Web Extraction from popups +0.68
How to extract only person A's statements in a conversation bet... -1.23
Union two Arrays by colnames -3.48
Continuous week transition over years 0.00
keep numbers of a vector that recurr more than 3 times +4.69
rvest: how to follow_link an image in a webpage? +4.68
use aggregate to return a zero if criteria are not met -2.83
Frequency from vector in R 0.00
Subset based on row condition +0.14
convert data frame so that each unique transaction listed becomes a... -2.73
Conditionally removing duplicates in Excel based on highest value i... +4.24
How can I group by name and then only select the maximum value of e... +4.18
calculate a mean by criteria in R +4.21
R WebCrawler - XML content does not seem to be XML: 0.00
Expand a matrix by columns -3.32
pulling up matching rows from a matrix using dplyr 0.00
sorting input files on the basis of number of observations 0.00
How to create a pivot table with the lowest 80% of the source data... 0.00
R: How to get the maximum value of a datetime column in a time seri... -1.07
extracting text R between special characters +1.31
how to insert a new column in a dataset with values if it satisfies... +0.39
How to count observations above a certain observation? -4.09
If statement depending on time of day -3.85
Ordering data frame by different factors -3.95
Conditional cumsum based on the next value of a vector -3.71
Convert Month to Quarter in R 0.00
Select or substract an specific part of an element of a data frame +3.97
R: How to combine several time periods 0.00
Merging specific set of row in R 0.00
Set a value to a variable in accordance with another +4.22
Find value relative to mean for particular Day of Year in R +2.65
new variable with as.date in R +0.37
How to interpolate two list in R in a 3º list? +1.10
Excel Pivot-table like functionality with R (plyr, ddplyr?) -2.71
How to remove row based on condition of row above or below +4.95
dplyr: finding percentage in a sub-group using group_by and summarise -2.89
Combining frequency tables in R -3.42
Group values in same column in R -3.16
R: calculate rank sum automatically -3.51
R: Pattern-matching financial time-series data with 2 large data se... 0.00
Cleaning Data When Variables are Column Names +1.54
Assignment of variable based on other column +2.05
Excel exact match searchable matrix 0.00
Spreadsheet Formula, return the row whose range matches a value +4.64