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Diffstat (limited to 'Introduction_To_Linear_Algebra_by_Gilbert_Strang/CH2/EX2.3.1')
| -rw-r--r-- | Introduction_To_Linear_Algebra_by_Gilbert_Strang/CH2/EX2.3.1/Ex2.3_1.r | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/Introduction_To_Linear_Algebra_by_Gilbert_Strang/CH2/EX2.3.1/Ex2.3_1.r b/Introduction_To_Linear_Algebra_by_Gilbert_Strang/CH2/EX2.3.1/Ex2.3_1.r new file mode 100644 index 00000000..7dcd7475 --- /dev/null +++ b/Introduction_To_Linear_Algebra_by_Gilbert_Strang/CH2/EX2.3.1/Ex2.3_1.r @@ -0,0 +1,12 @@ +# Example : 1 Chapter : 2.3 page no : 57 +#Matrix multiplication as dotproduct of row and column +A<-matrix(c(3,4,5,6),nrow=2,ncol=2,byrow=T) +x<-c(2,1) +B<-A%*%x +B +Ax<-c() +for(i in 1:2){ + Ax<-c(Ax,sum(A[i,]*x)) +} +Ax<-matrix(Ax,ncol=1) +Ax
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