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Rating Stats for

Zheyuan Li

Rating
1705.91 (128th)

Reputation
49,979 (2,002nd)

Page: 1 2 3 4 5 ... 24

Title	Δ
uncover an integer sequence where all but one values are masked by...	0.00
Product between all combinations of a vector's elements	+1.23
Why doesn't R throw an error when I use only the initial part o...	0.00
What can R do about a messy data format?	-0.74
Fast group-by simple linear regression	0.00
Probability Density (pdf) extraction in R	0.00
Calculating pvalue within a huge data frame takes very long	-0.61
wieghted mean on multiple columns for all rows	0.00
Fast pairwise simple linear regression between variables in a data...	0.00
How to build & store this large lower triangular matrix for mat...	+1.63
Why can't I take the cross product of a sparse matrix (dgCMatri...	-2.97
Fast post hoc computation using R	0.00
How to make group_by and lm fast?	+0.91
Find the minimum hamming distance between a string and a long vecto...	+0.96
When should I use "which" for subsetting?	+0.68
How to match a data frame of variable names and another with data f...	0.00
Optimizing degrees of freedom in spline regression	0.00
(fast) pairwise comparison of matrix columns whose elements have &q...	+0.76
appending to multiple elements of a list in R	0.00
How to enumerate all combinations in a matrix in R?	+1.23
Can't get aggregate() work for regression by group	0.00
Linear regression with `lm()`: prediction interval for aggregated p...	0.00
How to calculate the product from combinations of several vectors i...	+0.67
Compute element-wise quantiles for a list of matrices R	0.00
R code for plotting using layout() works when executed line by line...	0.00
duplicated values found after sampling a vector of no duplicates wi...	0.00
Locating which elements of a matrix are outputted	0.00
How to find the lowest and highest values on a regression line with...	+0.24
Why does NULL == 1 return logical(0) than FALSE?	0.00
Sketching a fitted normal distribution	0.00
Efficiency of matrix rowSums() vs. colSums() in R vs Rcpp vs Armadi...	+0.96
How can I predict values for a specific point using the idw() funct...	+1.12
Plotting a LASSO model with "mtcars" dataset in R	+0.26
Two-way ANOVA with weighted dependent variable	0.00
Another attempt on fitting GLM for a large dataset with big factor...	0.00
How to check if any two adjacent elements in a vector are non-zero	+0.96
How to list all S3 methods defined in a specific package / namespac...	0.00
How can I create a boxplot of within-group euclidian distances for...	0.00
Why isn't column-wise operation much faster than row-wise opera...	0.00
as.matrix on a distance object is extremely slow; how to make it fa...	0.00
How to remove any co-occurrence of sub-list elements from vector (R)	-0.04
Approximation to constant "pi" does not get any better af...	0.00
Write a trackable R function that mimics LAPACK's dgetrf for LU...	0.00
Does the term "vectorization" mean different things in di...	+1.35
Can I stably invert a Vandermonde matrix with many small values in R?	0.00
Calculate percentile for every column in a data frame in R	+0.25
GAM with "gp" smoother: how to retrieve the variogram par...	0.00
GAM with "gp" smoother: predict at new locations	0.00
Data frame into a symmetric matrix while keeping all row and column	+0.84
R: approximating `e = exp(1)` using `(1 + 1 / n) ^ n` gives absurd...	+1.35