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+# Packages used : pracma
+# To install pracma,type following in command line while connected to internet
+# install.packages("pracma")
+# package can be included by command " library(pracma) "
+# for more information about pracma visit https://cran.r-project.org/web/packages/pracma/index.html
+
+# Example : 2 Chapter : 2.6 Pageno : 96
+# LU Factorisation
+library(pracma)
+A<-matrix(c(1,1,0,0,1,2,1,0,0,1,2,1,0,0,1,2),ncol=4)
+print("LU factorisation of A is")
+print(lu(A))
+# The answers may vary due to rounding off values \ No newline at end of file