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Rating Stats for

G. Grothendieck

Rating
1622.82 (1,021st)
Reputation
165,339 (319th)
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Title Δ
sum only the negative values in a row from an xts-object -0.67
Find R-square value of Weibull fit (Survival model) in R 0.00
Create a rolling list in R +0.32
Nest function over multiple dataframes 0.00
Assign a dynamic function to Global Environment in R +1.52
How to simplify this R code to rbind all the tables of a list? 0.00
How to multiply each column by each scalar in R? +1.24
lapply & sapply on data.frame to test all elements in each colu... +1.39
Conditional Transpose with NAs in R -0.67
Regex optional character preceded by Negative Lookback in R -2.59
Create sub lists by varying index in R 0.00
How to delete the following row of a conditional row in a R datafra... +0.91
Use list names in sqldf? 0.00
Multiple plots in R with time series -0.42
How to transform different groups into time series 0.00
Overlay multi-panel time-series in R 0.00
How to handle dataframes with multiindexed columns in R? 0.00
how to grep text and aggregate -0.98
str_split on first and second occurence of delimter at different lo... 0.00
How to break from only certain loops in R +0.32
how to count and dcast for all columns in r -0.29
How can I group by in R as in SQL? -0.12
How to replace values in matrix based on true/false indices of anot... -0.49
Regex matching different patterns 0.00
Changing Axis on Time Series Plot -0.59
sqldf R Error create a table 0.00
Generate date sequences in a dataframe with variable lengths for ea... 0.00
If else statements to check if a string contains a substring in R +0.19
Fill time series data frame with dummy zero 0.00
R: Counting consecutive letters in a string -0.95
Modify a function call captured in exp -0.69
R: Rollapply, preserve Date column 0.00
extend a value to fill missing values -0.34
Piecewise linear regression with constraint - r -0.19
Changing YYYY-MM-DD to three different columns +1.35
How to calculate rolling correlations between several columns and o... +1.67
R: apply vs do.call +0.32
R - Convert a Character Vector into a Data Frame -1.77
Creating functions with logical comparatives as input R 0.00
Plot year below month on x axis 0.00
GMM rolling estimation repeats same value to each windows -0.63
removing elements in a vector that contain pure numbers in R +1.29
Calculating moving differences across columns per row in r +1.01
Convert character to date in R while changing date default format +1.24
Writing a list of matrices to csv? +0.27
construct a "simple" fixed rolling window in r 0.00
How to aggregate dataframe by minimum daily value 0.00
Exponential distribution in R +1.69
R Programming and GGPLOT2 - how to SUM data to create a line graph -0.17
conversion Time_Series to data.frame 0.00