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Zheyuan Li

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1705.91 (128th) 		Reputation
49,979 (2,002nd)
Page: 1 2 3 4 ... 24
Title Δ
How do I match one vectors index positions to a different vectors i... 0.00
Permute columns of a square 2-way contingency table (matrix) to max... 0.00
element-wise percentage change between two data frames 0.00
Find confidence interval of a regression line at its center per group 0.00
How to generate 5-digit random integers where not all digits take 0... +1.33
sorting a complex vector by imaginary part in R +0.24
sum a matrix series: how to boost a loop of matrix multiplication a... 0.00
The result of kmeans() does not vary from run to run +0.90
Weird behavior of 'diag' function -1.35
Convert 2-level factor to TRUE / FALSE -0.87
How to find cumulative variance or standard deviation in R +1.05
Are eigenvectors returned by R function eigen() wrong? 0.00
How to construct this block tridiagonal (sparse) matrix? 0.00
Calculate vector whose length is not known beforehand - should I &q... 0.00
Summing products of entries of a matrix in an efficient way -0.71
Get indices of two values that bracket zero in R +1.22
MASS::mvrnorm: is the diagonal of argument "Sigma" varian... 0.00
multiple relational (comparison) operators: why isn't `x < y... 0.00
Incorrect answer from Monte Carlo integration -3.21
"non-conformable arrays" error when subtracting or dividi... +0.60
mgcv: how to specify interaction between smooth and factor? part II 0.00
Is it possible for `lapply` to return partial processing results un... 0.00
How to sum every nth (200) observation in a data frame using R -0.82
reorder second double vector according to first double vector 0.00
How to make a sequence like 1:n, 1:(n-1), ... 1:2, 1? +0.88
"dims [product xx] do not match the length of object [xx]"... +0.81
How to fit a smooth hysteresis in a poorly distributed data set? 0.00
Which R objects can have arbitrary attributes? 0.00
How can I fit a smooth hysteresis in R? 0.00
Rough thin-plate spline fitting (thin-plate spline interpolation) i... 0.00
The documented (first) example for R function `constrOptim` seems w... 0.00
What is wrong with my R for-loop that sums a series? 0.00
Remove code between #if 0 and #endif when exporting a C file to a n... -2.19
Why do I see "integer" rather than "Vector" for... +0.21
predic.lm gives wrong number of predicted values when I fit and pre... 0.00
avoid repeatedly writing model formula when fitting a number of lin... 0.00
Compute sample statistics for a data vector with ties which is stor... 0.00
generating a random string and doing simulation in R +1.29
How to recover type of list element in r? 0.00
Finding the order and sequence of events in R +0.24
What is the algorithm behind R core's `split` function? 0.00
Find areas of polygons: integration under vertical and horizontal g... 0.00
Compute all possible slopes between two points +1.61
Why should someone use {} for initializing an empty object in R? +1.12
convert dummy data frame into data frame 0.00
Cumulative multiplication in R with the addition of extra constants +1.31
record linear regression results repeatly +0.84
How to annotate all points on a Q-Q plot when using `qqnorm`? 0.00
Idiomatic matrix type conversion, say convert Integer (0/1) matrix... +1.02
Find the complement with the `subset` function in R +0.27