I am trying to build an efficient frontier using fPortfolio R Package (R3.3.1 and fPortfolio 3011.81). But launching frontier=portfolioFrontier(equityR.data,spec,constraints) I will always face an error:
Error in `colnames<-`(`*tmp*`, value = c("SEC_1", "SEC_2", "SEC_3", "SEC_4", ...