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 Home > database
  • ▪ Select previous and next N rows with the same value as a certain row
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  • ▪ Optim() function in R
  • ▪ How to extract date from a vector using stringr functions
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  • ▪ Randomize non-diagonal elements of symmetric matrix
  • ▪ Modify multiple columns at same time in R
  • ▪ Time difference from 2 different columns in R
  • ▪ Conditional rowwise sum of subset of columns dplyr
  • ▪ extract the identical beginning parts of multiple strings
  • ▪ Create a vector of years and weeks with ISO-8601 format in R
  • ▪ R convert dataframe to list of unique memberships per column for each row
  • ▪ Pivoting to a longer format using pivot_longer
  • ▪ Display multiple cylinders efficiently in RGL Plot
  • ▪ How have a image in the center of the dashboard header in Shinydashboard R?
  • ▪ Recycle vector by starting from the end
  • ▪ Replace randomly 1000 NA Values in a dataframe column with 0s, without overwriting 1s
  • ▪ Chi square matrix residuals
  • ▪ data.table tag rows that have no duplicate values within a column
  • ▪ Troubleshooting R table function to create a more complete-looking table
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