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| author | priyanka | 2015-06-24 15:03:17 +0530 |
|---|---|---|
| committer | priyanka | 2015-06-24 15:03:17 +0530 |
| commit | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (patch) | |
| tree | ab291cffc65280e58ac82470ba63fbcca7805165 /662/CH8/EX8.4 | |
| download | Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.tar.gz Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.tar.bz2 Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.zip | |
initial commit / add all books
Diffstat (limited to '662/CH8/EX8.4')
| -rwxr-xr-x | 662/CH8/EX8.4/Example8_4.jpg | bin | 0 -> 13436 bytes | |||
| -rwxr-xr-x | 662/CH8/EX8.4/Example8_4.sci | 61 |
2 files changed, 61 insertions, 0 deletions
diff --git a/662/CH8/EX8.4/Example8_4.jpg b/662/CH8/EX8.4/Example8_4.jpg Binary files differnew file mode 100755 index 000000000..cc1b40256 --- /dev/null +++ b/662/CH8/EX8.4/Example8_4.jpg diff --git a/662/CH8/EX8.4/Example8_4.sci b/662/CH8/EX8.4/Example8_4.sci new file mode 100755 index 000000000..d0fe91735 --- /dev/null +++ b/662/CH8/EX8.4/Example8_4.sci @@ -0,0 +1,61 @@ +//Programming Example 8.4
+//find the maximum of a function within a specified interval
+
+funcprot(0)
+CNST=0.0001;
+
+function[]= mainmax()
+ global a;
+ global b;
+ //read input data(interval end points)
+ printf("a=");
+ a=scanf("%f");
+ printf("b=");
+ b=scanf("%f");
+
+ global x1;
+ global y1;
+ global xr;
+ global yr;
+ //interval reduction loop
+ first="t";
+ while ((( y1<> yr) & (( b- a)>3*CNST) ) | (first=="t"))
+ reduce();
+ first="f";
+ end
+ //calculate xmax and ymax and display the result
+ xmax=0.5*( x1+ xr);
+ ymax=curve(xmax);
+ //disp(xmax,ymax,"xmax ymax")
+ printf("xmax=%f , yamx=%f", xmax,ymax);
+endfunction
+
+//interval reduction routine
+function[]=reduce()
+ global a;
+ global b;
+ global x1;
+ global y1;
+ global xr;
+ global yr;
+ x1= a+0.5*( b- a-CNST);
+ xr= x1+CNST;
+ y1=curve(x1);
+ yr=curve(xr);
+ if y1>yr then
+ b=xr;
+ end
+ if y1<yr then
+ a=xr
+
+ end
+endfunction
+
+//evaluate the function y=x*cos(x)
+function[sol]= curve(x)
+ sol=x*cos(x);
+endfunction
+
+// routine call
+mainmax()
+
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