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Diffstat (limited to 'Introduction_To_Linear_Algebra_by_Gilbert_Strang/CH2/EX2.3.b')
| -rw-r--r-- | Introduction_To_Linear_Algebra_by_Gilbert_Strang/CH2/EX2.3.b/Ex2_2.3b.r | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/Introduction_To_Linear_Algebra_by_Gilbert_Strang/CH2/EX2.3.b/Ex2_2.3b.r b/Introduction_To_Linear_Algebra_by_Gilbert_Strang/CH2/EX2.3.b/Ex2_2.3b.r new file mode 100644 index 00000000..6dc8d2ee --- /dev/null +++ b/Introduction_To_Linear_Algebra_by_Gilbert_Strang/CH2/EX2.3.b/Ex2_2.3b.r @@ -0,0 +1,18 @@ +#Example : 2.3b Chapter : 2.3 Pageno : 61 +#Multiplication with Elimination and Permutation matricies +Ab<-matrix(c(1,4,0,2,8,3,2,9,2,1,3,1),ncol=4) +E21<-matrix(c(1,0,0,-4,1,0,0,0,1),ncol=3,byrow=T) +P32<-matrix(c(1,0,0,0,0,1,0,1,0),ncol=3,byrow=T) +E21Ab<-E21%*%Ab +print(E21Ab) +P32E21Ab<-P32%*%E21Ab +print(P32E21Ab) +P32E21<-P32%*%E21 +print(P32E21) +P32E21Ab<-P32E21%*%Ab +print(P32E21Ab) +#Solution for this system is +b<-P32E21Ab[,4] +P32E21Ab<-P32E21Ab[,-4] +x<-solve(P32E21Ab,b) +print(x)
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