Help! Want to read from a xl file and get an output voltage value!!!

Hello..
I`m a beginner, so please help..
My program should output an voltage value that is read from an xl-file with one collum. The most important is that each values in the xl graph should be read per iteration. So that the file is read over time. I want to use this xl file to controll the output signal over time.
Can anyone show me how this VI would look like, and what would the xl file look like??

The easiest way to do this is to save your Excel file as a comma or tab separated text file and not the native Excel format. Then you can use Read From Spreadsheet File (on the File I/O palette). Using this, you can read the file all at once and then just have a 1D array that you can wire to a while or for loop so that with each iteration of the loop, you get one element in the array. A for loop automatically indexes an input array. Reading the file all at once will be more effecient that reading the file line by line.

Similar Messages

Reading from a text file and displaying the contents with in a frame

Hi All,
I am trying to read some data from a text file and display it on a AWT Frame. The contents of the text file are as follows:
pcode1,pname1,price1,sname1,
pcode2,pname2,price2,sname1,
I am writing a method to read the contents from a text file and store them into a string by using FileInputStream and InputStreamReader.
Now I am dividing the string(which has the contents of the text file) into tokens using the StringTokenizer class. The method is as show below
void ReadTextFile()
                    FileInputStream fis=new FileInputStream(new File("nieman.txt"));
                     InputStreamReader isr=new InputStreamReader(fis);
                     char[] buf=new char[1024];
                     isr.read(buf,0,1024);
                     fstr=new String(buf);
                     String Tokenizer st=new StringTokenizer(fstr,",");
                     while(st.hasMoreTokens())
                                      pcode1=st.nextToken();
                           pname1=st.nextToken();
          price1=st.nextToken();
                          sname1=st.nextToken();
     } //close of while loop
                } //close of methodHere goes my problem: I am unable to display the values of pcode1,pname1,price1,sname1 when I am trying to access them from outside the ReadTextFile method as they are storing "null" values . I want to create a persistent string variable so that I can access the contents of the string variable from anywhere with in the java file. Please provide your comments for this problem as early as possible.
Thanks in advance.

If pcode1,pname1,price1,sname1 are global variables, which I assume they are, then simply put the word static in front of them. That way, any class in your file can access those values by simply using this notation:
MyClassName.pcode1;
MyClassName.pname1;
MyClassName.price1;
MyClassName.sname1

I just want to read in a csv file and send it to an instrument at 1 Hz per line

I want to read in a csv file that has pwr levels given at 1 Hz and append this using a format into string to the signal generator at 1 Hz. I just have never read in an entire file to automate the procedure. Thanks!

duplicate post
Please give time for people to respond.

Help needed regarding reading in a text file and tokenizing strings.

Hello, I require help with a task I've been set, which asks me to read in a text file, and check the contents for errors. The text file contains lines as follows.
surname:forename:1234:01-02-06
I can read in the file, but dont know how to split the strings so each token can be tested (ie numbers in the name tokens)
However, I am not allowed to use regex functions, only those found in java.io.*
I think i should be putting the tokens into an array, but have had no luck so far in doing so. Any help would be appreciated.

public class Validator {
     public static void main(String args[]) {
          String string = "Suname:Forename:1234:01_02-06";
          String stringArray[] = string.split(":");
          System.out.println (validateLetters(stringArray[0]));//returns true
          System.out.println (validateNumbers(stringArray[3]));//returns false
     static boolean validateLetters(String s) {
             for(int i = 0; i < s.length(); i++) {
             char c = s.charAt(i);
             if ((c < 'A' || c > 'Z') && (c < 'a' || c > 'z')) {
                     return false; //return false if one of characters is other than a-z A-Z
             }//end if
             }//end for
             return true;
     }//end validateLetters
     static boolean validateNumbers(String s) {
             for(int i = 0; i < s.length(); i++) {
             char c = s.charAt(i);
             if ((c < '0' || c > '9') && (c != '-')) {
                     return false; //return false if one of characters is other than 0-9 or -
             }//end if
             }//end for
             return true;
     }//end validateNumbers
}

Reading from a txt file and storing into a list

i want to read a list of counters(String) which are there in a flat txt file and store them into a List.
Any suggestion will be helpful
sanjeev

Try this
try {
          FileReader fr = new FileReader("C:/abc.txt");
          BufferedReader br = new BufferedReader(fr);
          String record = null;
          while ((record = br.readLine()) != null)
               System.out.println(record );

Read from a .db file and use the values within a program

each account has 3 values.. (password, balance,id_number)
my .db file contains the following.
pass201 250 9885 pass202 300 5547 pass203 700 1123
(this is 3 accounts)
I need to be able to read from this file and use each attribute within my program... HELP!

String[][] accounts = null;
try
     // Open a file input stream
     FileInputStream fileContents = new FileInputStream("filename");
     byte[] data = new byte[fileContents.available()];
     fileContents.read(data);
     fileContents.close();
     String contents = new String(data);
     StringTokenizer values = new StringTokenizer(data); // using space character as delimiter
     // Using 3 values per line
     int lines = (int)(values.countTokens()/3);
     int columns = 3;
     accounts = new String[lines][columns];
     for(int i=0; i<lines; i++)
          for(int j=0; j<columns; j++)
               accounts[i][j] = values.nextToken();
catch(Exception error)
     // debug stuff
}

Want to Read the a txt file and put the data into the table colums.

I have a text file in which data is piped separated and I want to put the data in the table column.
Eg.
Text File Column
First_name|Last_name|address|phone_number
Database table:
first_name ,last_name,address,phone_number
It's very urgent.
Thanks For your help in advance.
Himanshu

Use sqlldr or external file.
See http://download.oracle.com/docs/cd/E11882_01/server.112/e10701/part_ldr.htm#i436326 for SQL Loader.
See http://download.oracle.com/docs/cd/E11882_01/server.112/e10595/tables013.htm#ADMIN11705 for External table.

Footer.htm, nav.htm, header.htm Disappearing from local webpage files and GET or Revert won't bring them back!

This is driving me crazy! When I pull up a webpage to work on in DW CS4, it comes up with an asterick and no nav, header or footer. Sometimes I can right click the file tab and click Revert to bring everything back up. Then I save that page and work on it, make changes and save and upload it.
Right now, on the page I want to work on, Revert isn't available, so I tried GET. It reloaded without the nav, footer and header -- which are on the live site page. Also, after GET, the nav file gets an asterick again, both on the nav.htm file tab and on the source file for the page I tried to download.
Repeatedly I open nav, footer and header to check them, they all come up with astericks even though I have not changed them since my last save. I save them again, upload them, then try again to open a webpage to work on and it comes up with an asterick and no nav, footer or header, and the same process starts all over again.
I changed my website from HTML 4.0 to XHTML 1.0 the way my html instructer said: Modify>PageProperties>Title/Encoding>Apply
Could this be creating the problem. Please help me. I am afraid of really messing up my whole website. Thanks!

The HTML probably uses a relative path to the image files as the images are uploaded to the server in the same folder as the HTML file.
You would need to find the absolute path to these files.
Relative path example - images/file-name.jpg
Absolute path example - http://www.domain-name.com/folder-name/images/file-name.jpg

Passing information from external asp file and getting it in the portal

Hi,
I think that the answer for my question is simple but I'm not sure how it is done.
I would like to pass information from asp page(microsoft server pages) to the portal and extract the information in the portal
I know how to how to pass the the information as POST or GET method
but how do I extract the infomation within an iView ?
and what is the portal URL I need to call from the asp page ? a page URL or an iView URL ?
Thanks
Y.R

Hi,
In order to use an ASP application in the portal u have to first create a system. In the System Definition Properties, give the url of your ASP page in the Name of server field and the name of the ASP page in the URI field.
For more clear understanding, please go through the following document
http://help.sap.com/bestpractices/crossindustry/enterpriseportal/v160/documentation/How-to_Guides/25_HowToUseAppIntegrator_en.pdf
Best Regards
Priya

// Code Help need .. in Reading CSV file and display the Output.

Hi All,
I am a new Bee in code and started learning code, I have stared with Console application and need your advice and suggestion.
I want to write a code which read the input from the CSV file and display the output in console application combination of first name and lastname append with the name of the collage in village
The example of CSV file is
Firstname,LastName
Happy,Coding
Learn,C#
I want to display the output as
HappyCodingXYZCollage
LearnC#XYXCollage
The below is the code I have tried so far.
// .Reading a CSV
var reader = new StreamReader(File.OpenRead(@"D:\Users\RajaVill\Desktop\C#\input.csv"));
List<string> listA = new List<string>();
while (!reader.EndOfStream)
var line = reader.ReadLine();
string[] values = line.Split(',');
listA.Add(values[0]);
listA.Add(values[1]);
listA.Add(values[2]);
// listB.Add(values[1]);
foreach (string str in listA)
//StreamWriter writer = new StreamWriter(File.OpenWrite(@"D:\\suman.txt"));
Console.WriteLine("the value is {0}", str);
Console.ReadLine();
Kindly advice and let me know, How to read the column header of the CSV file. so I can apply my logic the display combination of firstname,lastname and name of the collage
Best Regards,
Raja Village Sync
Beginer Coder

Very simple example:
var column1 = new List<string>();
var column2 = new List<string>();
using (var rd = new StreamReader("filename.csv"))
while (!rd.EndOfStream)
var splits = rd.ReadLine().Split(';');
column1.Add(splits[0]);
column2.Add(splits[1]);
// print column1
Console.WriteLine("Column 1:");
foreach (var element in column1)
Console.WriteLine(element);
// print column2
Console.WriteLine("Column 2:");
foreach (var element in column2)
Console.WriteLine(element);
Mark as answer or vote as helpful if you find it useful | Ammar Zaied [MCP]

HOW TO WRITE AND READ FROM A TEXT FILE???

How can I read from a text file and then display the contents in a JTextArea??????
Also how can I write the contents of a JTextArea to a text file.
Extra Question::::::: Is it possible to write records to a text file. If you have not idea what I am talking about then ignore it.
Manny thanks,
your help is much appreciated though you don't know it!

Do 3 things.
-- Look through the API at the java.io package.
-- Search previous posts for "read write from text file"
-- Search java.sun.com for information on the java.io package.
That should clear just about everything up. If you have more specific problems, feel free to come back and post them.

Read from a config file in File Adapter in SOA Suite 11g

I want to read from a config file in order to determine whether to archive or delete the file after processing using file adapter in SOA Suite 11g. How do i do that.

only part i replied on was the part of how to read a file
but i think in your case you could do the next
use the sync file adapter to read in the file during your process
based on this content you set a variable "myOutputDirectory"
then create a file adapter (write) which will store the file on file system
http://docs.oracle.com/cd/E23943_01/integration.1111/e10231/adptr_file.htm#CIACICFD
4.3.2.2.5 Specifying a Dynamic Outbound File Name
and use that (jca.file.Directory) property to store the file either on the archive location or the delete location

Getting repeated values when reading from a text file.

I need to read from a text file. When the token encounters a particular word (command) I need to read the next line and perform some actions. However, this part is working but it is repeating the values again and again until it encounters the next particular word (command). Hope that someone will help me out, as always when I posted a problem in these forums.
SetOperations class - contains the set methods
// Imported packages.========================================================
import java.util.Vector;
import java.util.Iterator;
// Public class SetOperations.===============================================
public class SetOperations
     // Instance variables.===================================================
     private Vector v = null; // Creates new instance of vector.
     protected int memberCount;
     // Constructor.==========================================================
     public SetOperations()
          v = new Vector();
     } // end constructor.
     // Method isMember.======================================================
     * Checks whether the element is already a member of the set.
     * @return True if Vector v contains Object member.
     public boolean isMember(Object member)
          if (member != null) // only if Object member is not null.
               return v.contains(member); // returns true if vector already contains member.
          else
               return false; // returns false if vector does not contain member.
     } // end public boolean isMember(Object member).
     // Method addMember.=====================================================
     * Adds a member to the set.
     * @return Adds Object member to Vector v.
     public void addMember(Object member)
          //if (! v.contains(member)) // only if element is not already a member.
          if (isMember(member) == false) // only if element is not already a member.
               v.add(member); // adds a member.
     } // end public void addMember(Object member).
     // Method countMember.===================================================
     * Returns the number of members present in the vector.
     * @return Number of elements present in the vector.
     public int countMember()
          return v.size();
     } // end public int countMember().
     // Method isSetEmpty.====================================================
     * Returns true if set is empty.
     * @return True if no elements are present in Vector v.
     public boolean isSetEmpty()
          return v.size() == 0; // returns 0 if no elements are present in the vector.
     } // end of public boolean isSetEmpty().
     // Method printMember.===================================================
     * Displays member/s of the set.
     * @return Prints element/s present in the vector.
     public void printMember()
          for (int i = 0; i < v.size(); i++) // iterates through present members.
               System.out.println("[" + i + "] " + v.get(i)); // displays member/s present in the vector.
     } // end of public void printMember().
} // end public class SetOperations.
SetTextLauncher class - reads from a text file and implements the set operations
// Imported packages.========================================================
import java.util.*;
import java.io.*;
// Public class SetTestLauncher.=============================================
public class SetTestLauncher
     // Main method public static void main(String args[]).===================
     public static void main(String args[])
          displayFile("test.txt"); // outputs result from text file.
     // method to display a file on screen
     public static void displayFile (String textFile)
          // Instance variables.===============================================
          // Creates new instances of SetOperations.
          SetOperations setA = new SetOperations();
          SetOperations setB = new SetOperations();
          SetOperations setC = new SetOperations();
          SetOperations setD = new SetOperations();
          SetOperations setE = new SetOperations();
          // Initialisation.
          String line = "", nextLine = "";
          FileReader fr = null;
          try
               // Opens the file with the FileReader data sink stream.
               fr = new FileReader(textFile);
               // Converts the FileReader input stream with the BufferedReader processing stream.
               BufferedReader br = new BufferedReader(fr);
               // Iterates through text file reading lines until end of text lines.
               while (line != null)
                    line = br.readLine(); // reads one line at a time.
                    if(line == null) break; // when the line is null break the loop.
                    // Creates a new instace of StringTokenizer.
                    StringTokenizer st = new StringTokenizer(line);
                    // Loops until there are no more tokens.
                    while (st.hasMoreTokens())
                         String token = st.nextToken(); // reads next token.
                         // Only if the token encounters the String "membera".
                         if(token.equals("membera"))
                              nextLine = br.readLine(); // gets next line.
                              setA.addMember(nextLine); // adds a member to the set.
                              // Displays members present in the set if vector is not empty.
                              if (! setA.isSetEmpty())
                                   setA.printMember(); // print members present.
                              // Displays the number of member/s present in the vector.
                              System.out.println("Number of set members: " + setA.countMember());
          // Catches and displays exceptions.
          catch (FileNotFoundException exp)
               System.out.println(exp.getMessage());
               exp.printStackTrace();
          catch (IOException exp)
               System.out.println(exp.getMessage());
               exp.printStackTrace();
          finally
               try
                    // if file is found
                    if (fr != null)
                         // close file
                         fr.close();
               catch (IOException exp)
                    exp.printStackTrace();
     } // end public static void main(String args[]).
} // end public class SetTestLauncher.

Thanks for your interest. Please ignore SetOperations class, it is just the class containing the methods and it works correctly since I checked it without reading from a text file. I marked the part where I think lies my problem in class SetTestOperations.
The information in the text file is as follows:
membera
Hillman
membera
Skoda
membera
Honda
membera
Toyota
and the result is:
[0] Hillman
Number of set members: 1
[0] Hillman
[1] Skoda
Number of set members: 2
[0] Hillman
[1] Skoda
[2] Honda
Number of set members: 3
[0] Hillman
[1] Skoda
[2] Honda
[3] Toyota
Number of set members: 4
instead of just one set:
[0] Hillman
[1] Skoda
[2] Honda
[3] Toyota
Number of set members: 4
Hope it is easier to understand like this.
Regards
Marco
I need to read from a text file. When the token
encounters a particular word (command) I need to read
the next line and perform some actions. However, this
part is working but it is repeating the values again
and again until it encounters the next particular
word (command). Hope that someone will help me out,
as always when I posted a problem in these forums.
SetOperations class - contains the set
methods
// Imported
packages.=============================================
===========
import java.util.Vector;
import java.util.Iterator;
// Public class
SetOperations.========================================
=======
public class SetOperations
// Instance
e
variables.============================================
=======
private Vector v = null; // Creates new instance of
f vector.
     protected int memberCount;
Constructor.==========================================
================
     public SetOperations()
          v = new Vector();
     } // end constructor.
// Method
d
isMember.=============================================
=========
* Checks whether the element is already a member of
f the set.
     * @return True if Vector v contains Object member.
     public boolean isMember(Object member)
if (member != null) // only if Object member is not
ot null.
return v.contains(member); // returns true if
if vector already contains member.
          else
return false; // returns false if vector does not
not contain member.
     } // end public boolean isMember(Object member).
// Method
d
addMember.============================================
=========
     * Adds a member to the set.
     * @return Adds Object member to Vector v.
     public void addMember(Object member)
//if (! v.contains(member)) // only if element is
is not already a member.
if (isMember(member) == false) // only if element
nt is not already a member.
               v.add(member); // adds a member.
     } // end public void addMember(Object member).
// Method
d
countMember.==========================================
=========
* Returns the number of members present in the
e vector.
     * @return Number of elements present in the vector.
     public int countMember()
          return v.size();
     } // end public int countMember().
// Method
d
isSetEmpty.===========================================
=========
     * Returns true if set is empty.
* @return True if no elements are present in Vector
r v.
     public boolean isSetEmpty()
return v.size() == 0; // returns 0 if no elements
ts are present in the vector.
     } // end of public boolean isSetEmpty().
// Method
d
printMember.==========================================
=========
     * Displays member/s of the set.
     * @return Prints element/s present in the vector.
     public void printMember()
for (int i = 0; i < v.size(); i++) // iterates
es through present members.
System.out.println("[" + i + "] " + v.get(i)); //
// displays member/s present in the vector.
     } // end of public void printMember().
} // end public class SetOperations.
SetTextLauncher class - reads from a text file
and implements the set operations
// Imported
packages.=============================================
===========
import java.util.*;
import java.io.*;
// Public class
SetTestLauncher.======================================
=======
public class SetTestLauncher
// Main method public static void main(String
g args[]).===================
     public static void main(String args[])
displayFile("test.txt"); // outputs result from
om text file.
     // method to display a file on screen
     public static void displayFile (String textFile)
// Instance
ce
variables.============================================
===
          // Creates new instances of SetOperations.
          SetOperations setA = new SetOperations();
          // Initialisation.
          String line = "", nextLine = "";
          FileReader fr = null;
          try
// Opens the file with the FileReader data sink
ink stream.
               fr = new FileReader(textFile);
// Converts the FileReader input stream with the
the BufferedReader processing stream.
               BufferedReader br = new BufferedReader(fr);
// Iterates through text file reading lines until
til end of text lines.
               while (line != null)
line = br.readLine(); // reads one line at a
at a time.
if(line == null) break; // when the line is null
null break the loop.
                    // Creates a new instace of StringTokenizer.
                    StringTokenizer st = new StringTokenizer(line);
                    // Loops until there are no more tokens.
                    while (st.hasMoreTokens())
String token = st.nextToken(); // reads next
next token.
// Only if the token encounters the String
tring "membera".
                         if(token.equals("membera"))
                              // *****THE PROBLEM LIES HERE....I GUESS
// need to read the next line after encountering the word membera in text file
nextLine = br.readLine(); // gets next line.
setA.addMember(nextLine); // adds a member to
ber to the set.
// Displays members present in the set if
set if vector is not empty.
                              if (! setA.isSetEmpty())
                                   setA.printMember(); // print members present.
// Displays the number of member/s present in
ent in the vector.
System.out.println("Number of set members: " +
s: " + setA.countMember());
          // Catches and displays exceptions.
          catch (FileNotFoundException exp)
               System.out.println(exp.getMessage());
               exp.printStackTrace();
          catch (IOException exp)
               System.out.println(exp.getMessage());
               exp.printStackTrace();
          finally
               try
                    // if file is found
                    if (fr != null)
                         // close file
                         fr.close();
               catch (IOException exp)
                    exp.printStackTrace();
     } // end public static void main(String args[]).
} // end public class SetTestLauncher.

Reading from a text file into a 2D array

How do you read from a text file and put it into a 2D array? Or if someone could guide me to where I can find the information?

This tutorial shows how to read a file:
http://java.sun.com/docs/books/tutorial/essential/io/scanfor.html
This tutorial shows how to create arrays with multiple dimensions:
http://java.sun.com/docs/books/tutorial/java/nutsandbolts/arrays.html

I have a VI and an attched .txt data file. Now I want to read the data from the .txt file and display it as an array in the front panel. But the result is not right. Any help?

I have a VI and an attched .txt data file. Now I want to read the data from the .txt file and display it as an array in the front panel. But the result is not right. Any help?
Attachments:
try2.txt ‏2 KB
read_array.vi ‏21 KB

The problem is in the delimiters in your text file. By default, Read From Spreadsheet File.vi expects a tab delimited file. You can specify a delimiter (like a space), but Read From Spreadsheet File.vi has a problem with repeated delimiters: if you specify a single space as a delimiter and Read From Spreadsheet File.vi finds two spaces back-to-back, it stops reading that line. Your file (as I got it from your earlier post) is delimited by 4 spaces.
Here are some of your choices to fix your problem.
1. Change the source file to a tab delimited file. Your VI will then run as is.
2. Change the source file to be delimited by a single space (rather than 4), then wire a string constant containing one space to the delimiter input of Read From Spreadsheet File.vi.
3. Wire a string constant containing 4 spaces to the delimiter input of Read From Spreadsheet File.vi. Then your text file will run as is.
Depending on where your text file comes from (see more comments below), I'd vote for choice 1: a tab delimited text file. It's the most common text output of spreadsheet programs.
Comments for choices 1 and 2: Where does the text file come from? Is it automatically generated or manually generated? Will it be generated multiple times or just once? If it's manually generated or generated just once, you can use any text editor to change 4 spaces to a tab or to a single space. Note: if you want to change it to a tab delimited file, you can't enter a tab directly into a box in the search & replace dialog of many programs like notepad, but you can do a cut and paste. Before you start your search and replace (just in the text window of the editor), press tab. A tab character will be entered. Press Shift-LeftArrow (not Backspace) to highlight the tab character. Press Ctrl-X to cut the tab character. Start your search and replace (Ctrl-H in notepad in Windows 2000). Click into the Find What box. Enter four spaces. Click into the Replace With box. Press Ctrl-V to paste the tab character. And another thing: older versions of notepad don't have search and replace. Use any editor or word processor that does.

Help! Want to read from a xl file and get an output voltage value!!!

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