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Rating Stats for

josliber

Rating
1659.52 (437th)

Reputation
37,771 (2,967th)

Page: 1 2 3 ... 19

Title	Δ
R dataframes: how to make a new column that calculates values based...	-0.51
Create new columns in loop based on different datasets	0.00
diag error: nrow or ncol cannot be specified when x is a matrix	0.00
Efficiently picking combinations of Integers	+1.54
Efficiently picking combinations of Integers	-1.46
Find array subset with the maximum product	0.00
"int object is not callable" error using PuLP code	0.00
Most efficient way to calculate function with large number of param...	+0.18
Most efficient way to calculate function with large number of param...	-2.36
Reading in and splitting file based on number of data elements in r...	0.00
How to calculate all permutations of a vector that satisfy a given...	-2.50
Combining data based on user input in R	0.00
How to avoid "operations are possible only for numeric, logica...	0.00
Feasible, bounded primal but infeasible dual in linear programming	0.00
Expressing an OR constraint in linear programming	0.00
Error disallowing the optimal solution using Python Pulp	+0.29
Store loop result for each iteration as separate vectors	+1.28
Double summation to find the variance in R	+0.94
Product of Two Variable in Integer Programming Objective	0.00
2D bin packing on a grid	-1.22
Merging of clusters	0.00
lpSolve package seems to give strange results	0.00
How to solve a system of linear equations over the nonnegative inte...	+0.75
Set up linear programming optimization in R using LpSolve?	0.00
Find shortest distance between multiple points	+0.67
Limiting Duplication of Specified Columns	+1.62
serially subtract from vector elements	0.00
Directly compute element in recursion using bitwise XOR operator	0.00
Multiply each observation by every other observation in another dat...	-0.98
Converting Excel Solver Solution to Python Pulp	0.00
How to split a data frame into training, validation, and test sets...	0.00
Nested for loop using apply function	+0.28
Converting a list of vectors and numbers (from replicate) into a da...	0.00
Replacing runs of zero in a vector with a fraction of the previous...	+0.99
Convert named vector to data frame using attribute values	+0.96
Cumulative sum with conditional subtraction using dplyr	0.00
Making a random number matrix	0.00
Linear regression with constraints on the coefficients	0.00
Compare rows to a vector	-0.96
Replace row with NA if any values are non-positive	+1.17
if...else statement runs both parts of the code	0.00
Minimize portfolio variance, constrained to be sufficiently similar...	0.00
How to calculate a weighted sum in R?	+0.25
Constrain variable to be in one of two disjoint ranges in quadratic...	0.00
Get intersections between sets of all combinations of observations	0.00
nloptr: does lbfgs() need to explicitly provide a gradient function...	0.00
Ordering Data Frame Columns Then Pasting Row Name	0.00
Igraph - Remove weakest edge from every triangle	0.00
For each element in a vector, find the length of the interval (excl...	-0.22
How to concatenate column repetitions of a matrix without a for loop	+1.09