Answers for "get sum in one colum r"

r sum based on two columns

aggregate(x$Frequency, by=list(Category=x$Category), FUN=sum)
  Category  x
1    First 30
2   Second  5
3    Third 34

Posted by: Guest on March-25-2020

how to get sum of rows and columns of a matrix in R

#Suppose x is a matrix
x<-matrix()

#Vector of Row sums of x
rowSums(x)
#Vector of Col sums of x
colSums(x)

Posted by: Guest on November-11-2020

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