CODEWITHSUNDEEP
rmatrixpipelinear-regressionfinance
Chern Hong Pang
Chern Hong Pang

Reputation: 1

The use of the function of matrix and pipe induce error for unused argument and dimnames in R

> betas <- betas %>%
+   matrix(data= models, nrow = 5, ncol = num_factors +1, byrow = T, dimnames = list) %>%
+   data.frame(row.names = FAANG)%>%
+   colnames(betas) <- c("Constant", "Mkt_RF", "SMB", "HML", "RMW", "CMA")
Error in matrix(., data = models, nrow = 5, ncol = num_factors + 1, byrow = T,  : 
  unused argument (.)

when i type in this code, it kept showing me that the matrix(., got error of unused argument(.), while i did not put any symbol before data.

betas <- betas %>%
  matrix(unlist(models),nrow = num_factors, ncol = num_factors +1, byrow = T) %>%
  data.frame(row.names = FAANG)%>%
  colnames(betas) <- c("Constant", "Mkt_RF", "SMB", "HML", "RMW", "CMA")

Error in matrix(., unlist(models), nrow = num_factors, ncol = num_factors +  : 
  'dimnames' must be a list

this is the original code from the course of https://www.coursera.org/learn/using-r-for-regression-and-machine-learning-in-investment/lecture/Uq7v7/l5-understanding-machine-learning-concepts (free course), but it did not work as well.

Upvotes: 0

Views: 42

Answers (1)

RRDK
RRDK

Reputation: 86

You pipe betas to matrix() but at the same time you provide all parameters to matrix(). Hence, there's no parameter that will use betas which is piped as . Piping puts your input as the first parameter. You can read more here.

In your second example, unlist(models) will be assigned to the dimnames parameter since it's the only parameter left.

Upvotes: 1

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