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ThomasIsCoding

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1498.73 (3,826,018th) 		Reputation
43 (1,121,033rd)
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Title Δ
How to lag a specific column of a data frame in R -0.29
ifelse statements with multiple conditions and NA +0.93
Combination of columns in a data frame -1.17
Create a row vector that contains matrix*matrix product +0.09
How to create an Octave function that evaluate the sum of pairs of... -1.50
R - Finding partial matches in strings between two vectors -1.44
Split data in R -0.67
Determine if all IDs in the column of one data.frame are in a colum... -0.30
R indexing a function under an if else statement inside a for loop... +0.09
Create sequence without end point -1.16
checking every two adjacent elements in rows of a matrix +0.43
Improve speed of appending array elements if not already in array -1.08
Renaming Variables Dynamically +1.42
How should I do a for loop for an entire column with an if clause i... 0.00
Plot data time in a cell array X values in double in Matlab -0.16
Calculate value per group and append as a key-value pair in existin... -0.44
How to extract numeric part with "e" from a string +0.93
Shifting Strings using R functions +0.55
Form a block diagonal matrix in r +0.59
Combing data frame rows in R based on common values -0.85
To count how many times one row is equal to a value +0.53
Single integer in R 0.00
I'm tring to fill an empty Vector +2.56
A loop for calculating mean by group and ignore the NA 0.00
Add column to list of data frames and do incremental addition / Loo... -0.28
How to custom arrange such that no group dimension contains the sam... 0.00
Substring each element of the data frame in R +0.87
How to merge both dataframes by fixed columns +0.08
Form a matrix (a^|i-j|) of dimension 100x100 in R -1.43
Is there a way to repeat a function a fixed number of times and sav... +0.62
Efficient version for searching for two strings in two columns in R -0.35
Can I aggregate rows by under certain columns condition on R just i... +2.59
interpolate NA only for the last value -1.02
for loop to calculate mean by group (also ignore NA) -0.76
Equivalent function to excel's replace -0.50
R Find the largest palindrome made from the product of two 3-digit... 0.00
Group similar strings and change their values to something common w... -0.45
Subset NAs between values -1.15
Need to use a loop or vectorization to create multiple numbered var... +0.10
Apportion number of days per month between two dates in R code? 0.00
Group by similar observations - rows 0.00
Filling a matrix with the means that need to be calculated, using a... -1.90
Find the number of elements in a list -1.72
If loop to find date where values are bigger than certain threshold 0.00
Create a boolean matrix from a matrix -1.24
Create a vector that contains the first 10 powers of 2, then the fi... +0.58
Matlab, I need to find the row with the smallest sum of its elements -1.51
R: rename columns with sequencial number and save the list 0.00
Is there a way to match two different data frames for multiple colu... +0.07
Changing multiple columns name, pasting at the beginning/end of col... -0.70