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R language (operations ("+", "-", "*", "…
R language
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Vectors
names(name1,name2,name3,...) - assigns names to vector columns
c(elem1,elem2,elem3...) - creates a vector
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Lists
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list (name1 = obj1 , name2 = obj2 , name3 = obj3,..)
Matrix
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matrix(elems, nrow/ncol = x, byrow =TRUE/FALSE)
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context
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dir()
.create (dirname, recursive = TRUE/FALSE, mode =“xxxx”)
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.create(file.path(‘testdir2’,’testdir3”),recursive=T)
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Factors
factor( v1 , levels = v2, labels =v3, ordered = TRUE/FALSE )
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Data Frames
CREATE
df <- data.frame(v1,v2,v3...,stringsAsFactors = FALSE/TRUE)
NAME COLUMNS
names(df)<-c("name1","name2","name3"...)
df<-dataf.frame("name1"=v1,"name2"=v2,...)
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MONTE CARLO SIMULATIONS
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sample(no. of samples, v1,replace=TRUE/FALSE)
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