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Diffstat (limited to 'Linear_Algebra_by_Jim_Hefferon/CH1/EX1.7')
| -rw-r--r-- | Linear_Algebra_by_Jim_Hefferon/CH1/EX1.7/Ex1_7.R | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/Linear_Algebra_by_Jim_Hefferon/CH1/EX1.7/Ex1_7.R b/Linear_Algebra_by_Jim_Hefferon/CH1/EX1.7/Ex1_7.R new file mode 100644 index 00000000..86158a6f --- /dev/null +++ b/Linear_Algebra_by_Jim_Hefferon/CH1/EX1.7/Ex1_7.R @@ -0,0 +1,20 @@ +#Example 1.7,page nO:5
+#package used: matlib
+#installation run command : install.packages("matlib")
+#package repo : https://github.com/friendly/matlib
+
+#installing and loading library
+#install.packages("matlib")
+library("matlib")
+
+#program
+A <- matrix(c(1,2,1,1,-1,-2,0,3,-1),ncol = 3)
+b <- c(0,3,3)
+Ab <- cbind(A,b)
+Ab <- rowadd(Ab,1,2,-2)
+Ab <- rowadd(Ab,1,3,-1)
+Ab <- rowadd(Ab,2,3,-1)
+Ab
+#from row3 : -4z=0,so z=0
+#from row2 : -3y+3z=3,so y=-1
+#from row1 : x+y=0,so x=1
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