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rafa.pereira

Rating
1490.79 (4,403,122nd) 		Reputation
6,121 (26,630th)
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Title Δ
Add a progress bar to boot function in R -2.12
subset data.table columns for calculation of new value but keep all... +4.08
Modify multiple columns of dataset by the same function in R -2.22
How to apply a function to each element/cell of a data.frame? -2.04
Refer to column numbers by using a number in another column when us... +4.02
two Y-axis for ggplot2 graph with a facet_grid 0.00
How can I revise my code to improve my processing speed -1.41
In R data.table, add a column which name is based on a string 0.00
Count and identify unique relations in R +4.19
Write .csv in a for loop 0.00
Add 1 in column according to specific dates and count +4.15
I want to fill a new column col c: if col a entries are blank then... +0.27
Select column names with specific values -2.47
Change color from a given date? -0.12
pearsons coefficient between rows R -3.36
Filtering data table based on condition in Column -3.74
How to replace specific data (letters or number) by another data (l... +0.04
How to add a column that gives the result of an operation on every... -4.02
R: count of the number of entries in a column excluding the blanks +0.35
dplyr, create a column conditional on presence or absence or text i... +0.02
For loop in R only working for the last index number -4.21
plot time series with discontinuous axis in R +3.99
get the mean of a variable subset of data in R +4.02
R: How to get the percentage change from two different columns -0.80
R dataframe: New variables with for-loops and regular expressions -3.46
Aggregate stock data by date from another data set -3.83
Dataframe is too big for merge - is there an alternative? +3.96
How to monitor progress of an apply function? +4.36
Fast data.table assign of multiple columns by group from lookup +4.69
How to keep factor strings after dplyr summarise? 0.00
subset recursively a data.frame 0.00
Aggregate column intervals into new columns in data.table -3.76
data.table group by non-id column in joined table 0.00
How can I create a graph like below in R? -1.72
createing sub matrix/dataframe R -3.76
Filter Data Per Value of Independent Variable in R -2.68
How do I exclude columns from a data.table? -4.00
R - How to conditionally color the values of a data.frame and make... -1.87
Alternative nested for loops for counting value occurrence in R dat... +3.83
Automate script for many genes with different values -4.14
ggplot2 geom_tile diagonal line overlay -3.67
Merge two data frames considering a range match between key columns +3.83
Subsetting timeseries data -0.97
Create a line plot (times series) from a 3d array -4.09
How to plot several boxplots by group in r? +4.11
creating a new column with logical values if value in another colum... -4.13
How to get rowSums for selected columns in R +2.96
Select Subset of Columns based on Vector R -3.65
alternative to subsetting in R +3.95
3-variables plotting heatmap ggplot2 -4.20