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Rating Stats for

Prasad Chalasani

Rating
1557.98 (5,993rd) 		Reputation
15,376 (9,136th)
Page: 1 2 3
Title Δ
How to generate a random treatment variable by factor? 0.00
How to vectorize: set a value based on last time a binary vector w... +3.90
R demos for presentation +0.01
Fastest Tall-Wide pivoting in R -4.34
How can I easily get the mean, median ,quartiles, etc. given counts... +3.12
apply treats numbers as characters +0.20
Windowed Feature Extraction in R for a Matlab User -4.01
Order Bars in ggplot2 bar graph -3.69
Is it posible to optimize (vectorize) these two functions for bette... +3.41
Identify all objects of given class for further processing 0.00
for loop specific elements of a vector in R -0.00
Change value of some column in xts based on other columns values wi... +3.05
Finding the Column Index for a Specific Value +3.10
Vectorizing a loop -0.24
customizing the axis labels in ggplot -0.07
R: Unique combination of columns 0.00
Rank ordering xts objects representing some property of equities us... 0.00
Date counter for daily returns using trading days -0.52
plotting heatmaps with ggplot2; logscale color and modify color leg... 0.00
Using R to get volatility and Peak to avg. Ratio of internet traffi... 0.00
R question. Unexplainably empty factor combinations when plotting r... 0.00
How to iterate over a list of data-frames in R +3.45
How do I filter a data.frame in R by categorical variable? -0.63
Automatically expanding an R factor into a collection of 1/0 indica... +1.02
How to graph requests per second from web log file using R -2.38
How do I pass elements of a matrix row to the parameters of an R fu... -0.68
Summarise data frame ignoring repetition +1.92
Count how many consecutive values are true +3.91
How to turn a list of lists to a sparse matrix in R without using l... +1.90
R: Question about rank() +1.77
Select from a matrix based on the values of 2 distinct variables -3.59
Drawing a heatmap in R based on zipcodes only -1.80
Match dataframe rows according to two variables (Indexing) +4.01
Data.frame becomes factor/vector after filtering/subsetting 0.00
how to plot all the columns of a data frame in R +3.83
Set ordering of factor levels for multiple columns in a data frame -2.16
delete parts of a matrix in R +0.35
How to best create a Timer Function in R +3.60
What is the most efficient way to return ranks of a vector within l... -2.54
Plotting time-series with Date labels on x-axis +1.73
How can I generate by-group summary statistics if my grouping varia... +3.52
rollapply with "growing" window -3.99
Sorting a Square Matrix +1.52
R character factor to numeric vector +4.59
How to remove outliers from a dataset -1.94
Plotting order within a faceted dotchart in ggplot2 +3.65
vectorize this for loop (current row is dependent on row above) 0.00
Apply a list of n functions to each row of a dataframe? +3.72
chisq.test Error Message -3.41
calculate average over multiple data frames +3.09