initial commit / add all books

2 files changed, 53 insertions, 0 deletions

diff --git a/62/CH6/EX6.50/ex_6_50.png b/62/CH6/EX6.50/ex_6_50.png
new file mode 100755
index 000000000..cb29ec0b2
--- /dev/null
+++ b/62/CH6/EX6.50/ex_6_50.png
diff --git a/62/CH6/EX6.50/ex_6_50.sce b/62/CH6/EX6.50/ex_6_50.sce
new file mode 100755
index 000000000..7234437d9
--- /dev/null
+++ b/62/CH6/EX6.50/ex_6_50.sce
@@ -0,0 +1,53 @@
+close;
+clc;
+clear;
+n=0:3;
+x=cos(%pi*n/2);
+subplot(4,1,1)
+plot2d3(n,x)
+xtitle('x[n]','n')
+a=gca();
+a.x_location="origin";
+a.y_location="right";
+poly1=a.children.children;
+poly1.thickness=3;
+poly1.foreground=2;
+plot(n,x,'r.')
+subplot(4,1,2)
+h=.5^n;
+plot2d3(n,h);
+xtitle('h[n]','n')
+a=gca();
+a.x_location="origin";
+a.y_location="right";
+poly1=a.children.children;
+poly1.thickness=3;
+poly1.foreground=2;
+plot(n,h,'r.')
+y=convol(x,h)
+subplot(4,1,3)
+plot2d3(n,y(1:4));
+xtitle('y[n]','n')
+plot(n,y(1:4),'r.')
+a=gca();
+a.x_location="origin";
+a.y_location="right";
+poly1=a.children.children;
+poly1.thickness=3;
+poly1.foreground=2;
+clear y;
+X=dft(x,-1);
+H=dft(h,-1);
+Y=H.*X;
+y=dft(Y,1);
+subplot(4,1,4)
+plot2d3(n,y);
+xtitle('y[n]','n')
+plot(n,y,'r.')
+a=gca();
+a.x_location="origin";
+a.y_location="right";
+poly1=a.children.children;
+poly1.thickness=3;
+poly1.foreground=2;
+plot(n,x,'r.')