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Enrico Schumann

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1483.33 (4,481,608th) 		Reputation
363 (353,363rd)
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Title Δ
Finding optimal parameter for each input combination in the objecti... 0.00
How to use tidyquant (performance analytics) to calculate portfolio... 0.00
Monthly Rebalancing Strategies with Fees 0.00
Store unknown values from a function inside a vector for later use... 0.00
How would you optimize dividing bi variate data in R? 0.00
student-t distribution for portfolio optimization in R 0.00
Maximum determinant of sub-matrix -0.99
Error in gmv_opt with PortfolioAnalytics package in r 0.00
Finding ideal filter setting to maximize target function 0.00
Calculate the beta between stocks in my portfolio in matrix form 0.00
How to profile and optimise already fast code in R 0.00
R openxlsx read.xlsx having issues with datetime 0.00
using quadprog for portfolio optimization 0.00
problem with starting values in optim function 0.00
Implement criterion for parameters to be optimized over in optim() 0.00
Switch rows in data.table to create uniform variable 0.00
Efficient search & update, data tables or sparse matrix - R 0.00
R optim() constraint optimization does not find the first best -4.47
Create stock portfolio based on probabilities with rebalancing in R 0.00
Is there a more efficient version of match for searching repeated p... +0.63
How can I use optimize.portfolio from portfolio analytics library 0.00
How to find the set of parameters that gives the optimal value from... -2.98
Portfolio Optimize in R with ONLY a vector of mean returns and cova... -1.29
Optimize Selection of Columns that Maximize Correlation in R 0.00
Selecting elements from a list maximizing a function 0.00
How to calculate multiple returns of assets 0.00
Generate presence/absence and count dataframe, binned hourly by loc... 0.00
How to select the earliest date in a month from a Date series in R? +0.57
how to use fportfolio package in R for non time series input? 0.00
How can I make the sum of the weights (for the stocks in my portfol... 0.00
automatically try different initial values in optim 0.00
Is there a more efficient way to calculate monthly portfolio values... 0.00
Error in the code of Differential Evolution in R 0.00
Non-linear fitting with nls() is giving me singular gradient matrix... +4.16
Algorithmically detecting jumps in a time-series 0.00
how to use apply on cross correlation function in R 0.00
R solnp (package Rsolnp) fails to respect upper bounds 0.00
Axis ticks and labels for time with base R 0.00
Convert datetime from Excel to R -3.93
How can I multiply a list and vector elementwisely in R? +5.86
find last day of month in a sequence of dates -0.32
rollapply for moving average with non-business day -2.57
Optimisation of matrix in R 0.00
Slow performance of split() function -3.11
Aggregating seasonal means with the raster package in r 0.00
Lubridate not converting datetime to POSIXct correctly in R (dd/mm/... 0.00
How to reduce POSIXct time to previous 15-second interval for multi... -2.26
Dates in monthly time series -0.04
Money adding program in R +0.32
Why are my functions on lubridate dates so slow? -2.31