CS506 Web Design and Development assignment no 1 spring fall 25 october 2011

[Vuhelper]

Question:
Write a program that computes the average and standard deviation of the text floating point numbers in a file. Use the following formulas for the average and the standard deviation of N values. The formulas compute the sum, the sum of squares, the average, the average square, the variance, and finally, the standard deviation.
[FONT=&quot]sum = x1 + x2 + x3 + ... + xN-1 + xN [/FONT]
[FONT=&quot] [/FONT]
[FONT=&quot]sumSQ = x12 + x22 + x32 + ... + xN-12 + xN2 [/FONT]
[FONT=&quot] [/FONT]
[FONT=&quot]avg = sum/N[/FONT]
[FONT=&quot] [/FONT]
[FONT=&quot]avgSQ = sumSQ/N[/FONT]
[FONT=&quot] [/FONT]
[FONT=&quot]var = avgSQ - avg2[/FONT]
[FONT=&quot] [/FONT]
[FONT=&quot]sd = var(1/2)[/FONT]
The input file will contain any number text floating point numbers, similar to the following:
[FONT=&quot]10.5[/FONT]
[FONT=&quot]12.9[/FONT]
[FONT=&quot]9.67[/FONT]
[FONT=&quot]12.05[/FONT]
[FONT=&quot]8.23[/FONT]
[FONT=&quot]10.08[/FONT]
[FONT=&quot]10.23[/FONT]
[FONT=&quot]7.7[/FONT]
[FONT=&quot]10.4[/FONT]
[FONT=&quot]11.34[/FONT]
Numbers could be several, or none per line, and negative numbers are perfectly OK. [FONT=&quot][/FONT]
[FONT=&quot] [/FONT]
[FONT=&quot]Note: [/FONT][FONT=&quot]All the source code should be written manually. Your code must justify enough for 15 marks[/FONT]

[majju bahi]

I want the slution hurry . . . . . . .. . . i Want it

[rabeel]

why don't you discuss it with us.

[abdullahmit]

please come guys we try to solve it if no body give solution time is very very short

[rabeel]

yah sure that's the good idea.

[love_tornado]

Why u always attach the assignment instead of solution. This is already available on vulms. We search the solution and get this bullz shit. We dont need this. Stop hanging this shit

[Vuhelper]

Code:

SAVE THIS FILE IN .JAVA import java.io.*; import java.util.*; import javax.swing.*; public class assignment1{ public static void main( String args[] ){ try{ FileReader fr = null; BufferedReader br = null; fr = new FileReader ("input.txt"); br = new BufferedReader (fr); String line = br.readLine(); double sum =0 ; while (line != null) { double num = Double.parseDouble(line); sum += num; line = br.readLine(); } JOptionPane.showMessageDialog(null, "Sum = " + sum); br.close(); fr.close(); } catch(NumberFormatException nfEx) { System.out.println(nfEx); } catch(FileNotFoundException fnfEx){ System.out.println(fnfEx); } catch(IOException ioEx){ System.out.println(ioEx); } } }

[main_ihsan_shah]

the above code will work fine incase you save another file named input.txt in the folder in which you have already saved ur above prog ie.
//input.txt
//txt file for assignment1
10.3
20.4
30.5
40.6
50.7
//if i am wrong then guide me please

[mt_sh]

Incomplete file.....

[FONT=&quot]sumSQ = x12 + x22 + x32 + ... + xN-12 + xN2 [/FONT]

[FONT=&quot]avg = sum/N[/FONT]

[FONT=&quot]avgSQ = sumSQ/N[/FONT]

[FONT=&quot]var = avgSQ - avg2


are missing .
[/FONT]

[Vuhelper]

Code:

SAVE THIS FILE IN .JAVA import java.io.*; import java.util.*; import javax.swing.*; public class assignment1{ public static void main( String args[] ){ try{ FileReader fr = null; BufferedReader br = null; fr = new FileReader ("input.txt"); br = new BufferedReader (fr); String line = br.readLine(); double sum =0 ; while (line != null) { double num = Double.parseDouble(line); sum += num; line = br.readLine(); } JOptionPane.showMessageDialog(null, "Sum = " + sum); br.close(); fr.close(); } catch(NumberFormatException nfEx) { System.out.println(nfEx); } catch(FileNotFoundException fnfEx){ System.out.println(fnfEx); } catch(IOException ioEx){ System.out.println(ioEx); } } }