initial commit / add all books

2 files changed, 28 insertions, 0 deletions

diff --git a/1415/CH1/EX1.4.2/ex2.jpg b/1415/CH1/EX1.4.2/ex2.jpg
new file mode 100644
index 000000000..5542e2e1c
--- /dev/null
+++ b/1415/CH1/EX1.4.2/ex2.jpg
diff --git a/1415/CH1/EX1.4.2/ex2.sci b/1415/CH1/EX1.4.2/ex2.sci
new file mode 100644
index 000000000..2de9e56e5
--- /dev/null
+++ b/1415/CH1/EX1.4.2/ex2.sci
@@ -0,0 +1,28 @@
+//Example 2 Page 98

+clc

+clear

+

+x=[0 2 4 6 8 10 12 14]//assigning x values as given

+disp(x,'Years:')//displaying the x values

+y=[9 9 10 11 11 12 13 13]//assigning the y values

+disp(y,'Per capital GDP:')//displaying y values

+xy=x.*y//calculating xy values

+disp(xy,'xy:')//displaying xy values

+x2=x^2//calculating x^2 values

+disp(x2,'square of x')//displaying x^2 values

+n=8;//given n=8 data points

+disp(sum(x),'sumof x:')//finding the sum of x

+disp(sum(y),'sumof y:')//finding the sum of y

+disp(sum(xy),'sumof xy:')//finding the sum of xy

+disp(sum(x2),'sumof xsquare:')//finding the sum of x2

+m=((n*(sum(xy)))-((sum(x))*(sum(y))))/((n*(sum(x2)))-(sum(x)^2));//calculating m value

+disp(m,'m value is:')//displaying m values

+b=(sum(y)-(m*sum(x)))/n//calculating b value

+disp(b,'b value is:')//displaying b value

+

+function y=f(x)//function for regression line

+    y=m*x+b

+endfunction

+y=f(x)//calling function

+plot(x,y)//plotting graph between x and y

+xtitle('data point and regression line','x','y')//naming the axex