Read from 2 D file

Read 2D file
I have a file where I saved 2 columns of Data, E1 and E2.
I want to read this file and take a statistics for each
column. Then save the result on one file with 6 columns (Mean E1, standard
deviation E1, Variance E1, Mean E2, standard deviation E2, Variance E2).
See my example please.
Thank you for your help.
pascal
Attachments:
signal check and statistics.vi ‏65 KB

thank you for your replay,
I changed what you said. I think it works now. Can you confirm for me?
For the “for
loop” I used, is just to read many files of 2D data (I save my data in many file s of different names).
I want to calculate the statistics of all files and save them in one file (each row coresponds to one file).
I attached the prgram and 2 example of data file.
Pascal
Attachments:
f100.txt ‏69 KB
signal check and statistics.vi ‏57 KB
f000.txt ‏69 KB

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// display the information for the last product
displayProduct(inventory[currentProductIndex]);
private void jbtPreviousActionPerformed(java.awt.event.ActionEvent evt) {
if (currentProductIndex != 0) // it's not the first product displayed
currentProductIndex -- ; // move to the previous product (decrement the current index)
} else // the first product is displayed
currentProductIndex = inventory.length-1; // move to the last product
// after the current product index is set, display the information for that product
displayProduct(inventory[currentProductIndex]);
private void jbtNextActionPerformed(java.awt.event.ActionEvent evt) {
if (currentProductIndex != inventory.length-1) // it's not the last product displayed
currentProductIndex ++ ; // move to the next product (increment the current index)
} else // the last product is displayed
currentProductIndex = 0; // move to the first product
// after the current product index is set, display the information for that product
displayProduct(inventory[currentProductIndex]);
private void jbtFirstActionPerformed(java.awt.event.ActionEvent evt) {
currentProductIndex = 0;
// display the information for the first product
displayProduct(inventory[currentProductIndex]);
private void colorFieldActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
private void jbtModifyActionPerformed(java.awt.event.ActionEvent evt) {
prodNameField.setEditable(true);
prodNameField.setFocusable(true);
unitsInStockField.setEditable(true);
unitPriceField.setEditable(true);
private void jbtAddActionPerformed(java.awt.event.ActionEvent evt) {
IDNumberField.setText("");
IDNumberField.setEditable(true);
prodNameField.setText("");
prodNameField.setEditable(true);
colorField.setText("");
colorField.setEditable(true);
unitsInStockField.setText("");
unitsInStockField.setEditable(true);
unitPriceField.setText("");
unitPriceField.setEditable(true);
restockingFeeField.setText("");
invenValueField.setText("");
currentProductIndex = inventory.length;
private void jbtExitActionPerformed(java.awt.event.ActionEvent evt) {
DataOutputStream out = openOutputStream("inventory.dat");
for (InventoryPlusColor i : inventory)
writeInventory(i, out);
closeFile(out);
System.exit(0);
private static InventoryPlusColor readProduct(DataInputStream in) {
int idNum = 0;
String prodName = "";
double inStock = 0.0;
double pric

BalusC -- The line that gives me my NullPointerException is when I call the "DisplayProduct()" method. Its a dumb question, but with NetBeans how do I find out which reference could be null? I'm not very familiar with how NetBeans works with finding out how to debug. Any help you can give me would be greatly appreciated.The IDE is com-plete-ly irrelevant. It's all about the source code.
Do you understand anyway when and why a NullPointerException is been thrown? It is a subclass of RuntimeException and those kind of exceptions are very trival and generally indicate an design/logic/thinking fault in your code.
SomeObject someObject = null; // The someObject reference is null.
someObject.doSomething(); // Invoking a reference which is null would throw NPE.

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

Crystal Report that reads from an XML file Datetime or Date

I have a Crystal Report 2008 that reads from an XML file, the source File XML Date data looks like this: 2008-03-10
But the Crystal Report interpreted by datatime, I need the Crystal Report to look like this: 2008/03/10 (date) not 2008-03-10T00:00:00-05:00 (datatime)
Look at an example (source file xml, report, and parameter file to execute report) at url: http://www.5websoft.com/sample.zip
Import the file in the design and will to verify that interpret incorrectly the fields of type date as datetime
not mapped currently for fields..
Help.....
Thanks!

You could always reformat the field to only display the date portion:
Format Field > Date and Time tab; choose the date style you need here.
Or create a formula to extract just the date and use this field in your report:
date({table.field})

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.

How to read from a text file one character at a time?

Hello
I wish to read from a text file in a for loop and that on every iteration i read one charachter and proceed to the next one.
can anyone help me?
Lavi

lava wrote:
I wish to read from a text file in a for loop and that on every iteration i read one charachter and proceed to the next one.
can anyone help me?
Some additional comments:
You really don't want to read any file one character at a time, because it is highly inefficient. More typically, you read the entire file into memory with one operation (or at least a large chunk, if the file is gigantic) and then do the rest of the operations in memory. One easy way to analyze it one byte at a time would be to use "string to byte array" and then autoindex into a FOR loop, for example.
Of course you could also read the file directly as a U8 array instead of a string.
Message Edited by altenbach on 06-10-2008 08:57 AM
LabVIEW Champion . Do more with less code and in less time .

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.

Cannot read from the source file or disk

I had to get a new hard drive for my Satellite A665 old one kept freezing up; had a recovey disk from Geek Squad when I got it but they did not work. So I ordered a Recovery Disc set from Toshiba.
A few minutes after I insert the 3nd disc, I get the following message:
Cannot read from the source file or disk
PREINST14.SWM
Type: SWM File
Size: 670 MB
Modified: 10/29/2010 11:24pm
Clicking [Try Again] or [Skip] clicked try again twice. Gave same message so clicked skip. Got another message.
Cannot read from the source file or disk
PREINST18.SWM
Type: SWM File
Size: 372 MB
Modified: 10/29/2010 11:24pm
Clicking [Try Again] or [Skip] clicked try again twice. Gave same message so clicked skip after checking do it for next one. Got error message.
An error has occurred.
Error: 10-FC06-0002
Recovery Error.
Please press [OK] to turn off the computer.
I tried erasing the disk, then running the Recovery Wizard again, but wind up in the same place.

It's hard to know exactly what the problem is. You might want to contact customer support because it could just be a faulty disc.
- Peter

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.

Reading from an excel file

I was wondering, what do i need to look at to get cracking with making a programme that can read from a excel file
I was thinking of making a programme that uses a excel spreadsheet <this spreadsheet is made and provided by the national lottery and has all the winning combinations that have been drawn in past draws> and reading them in and generating a list of combinations that have not occured yet
Its just for a bit of fun, but could be a good challenege
thanks

PaulOckleford wrote:
If all you want to do is select from the excel sheet you may find it easier to use the jdbc option, I have an example of some code I wrote that does a select from an excel sheet and it may be useful for you:Just my opinion here but I would avoid using odbc to deal with the spreadsheet if at all possible.
Time for a war story:
After losing an argument with some business, marketng and management I had to develop a program that accepted spreadsheets as datafiles and it was nothing but trouble.
I experienced all kinds of type problems, the most common and annoying of them being
that the driver (via some logic unknown to me) will determine the type of each column.
Any data that is does not match that expectation is dropped (I found that the query returned NULL).
As far as I could tell there was no way to make the driver treat the data the way you want it too.
After much trouble and lots of manual intervention by the poor person who has to deal with this data on a regular basis it seems to be working but it was not fun it is still very ugly code.
You may not end up reliving my tale of woe, but I though I would give you some fair warning.
As I continue to say "Spreadsheets are not a reasonable data transfer format."

After updating I ended up with 4 icons on my desktop - I cannot delete any of them. The error message reads; "Cannot read from the source file or disk".

I updated from the original version to 6.0.1 and when I re-started FF there were 4 icons on my desktop. I managed to delete one of them, but I cannot delete the other two - to leave me with just one.
I get the error message of "Cannot delete file: Cannot read from the source fie or disk".

Here's the meaning of the error that you received.
"An error has occurred. ERROR :10-FC06-0002" -- may be caused by damaged recovery media or faulty hard drive"
Possible that the problem is on the recovery also.
Hope this helps.

How to remove noisy data points read from a text file

Reading data measurements taken in from a txt file. How do I get rid of noise aside from going into the text file and deciding point by point what to delete.

Well going in point by point and deleting is certainly one way of going about it. Of course that would defeat the entire purpose of having this great programming enviroment that is capable of doing that kind of thing for us.
Is your text file small enough to upload? Obviously you know what the criteria are for judging whether or not a data point is acceptable so it should be simple enough to program. Give us a bit more information and I can assure you there will be a race between LabVIEW experts to see who can post the cleanest, simplest, and fastest piece of code that will do what you need. My wager is on altenbach, but there are a few others here that are almost as impressive.

How to avoid pop-up dialog? "Read From Spreadsheet File.vi"

I am using LV2010 and VBAI2011.
I am using LV to write vi for my VBAI user interface. VBAI will send the inspection results to vi by "Update Inspection UI".
I am calling a "Run LabVIEW VI" from within the VBAI. This vi contains a sub-vi "Read From Spreadsheet File.vi"; the "file path" input to this sub-vi is a string control, which will be updated by a string value obtained in previous steps.
What happen is, when I run the Inspection, a windows "Choose File to Read" will pop up, even though I have already update the "file path" in VBAI. I guess this happens because the "Read From Spreadsheet File.vi" sub-vi didn't wait for the "file path" input, or rather the "file path" update was "too slow"
How to prevent this from happening?
Solved!
Go to Solution.
Attachments:
PQT_CurveFitting_Lookupxxx.vi ‏15 KB

I didn't use your code but tried the attached simple VIs and they work well. Can you create a simple VBAI interface that just runs these two VIs and see if you are able to replicate the issue? The VIs are LabVIEW 2010 SP1
Attached is my VBAI inteface as well, which is 2011 SP1.
Adnan Zafar
Certified LabVIEW Architect
Coleman Technologies
Attachments:
Run1st.vi ‏10 KB
Run2nd.vi ‏11 KB
Test1.vbai ‏3 KB

Encore CS4 error "could not read from the source file"

- Source File: C:\Users\Anil\AppData\Local\Temp\2013 11 08 c Big Budha_9.prproj
- Output File: F:\Adobe Encoded Blu-ray\For Disk #013\Disk#013-B\2013 11 08 c Big Budha.m2v
- Preset Used: Full HD 1080i [MPEG] 30 MBPS
- Video:
- Audio:
- Bitrate:
- Encoding Time: 01:49:53
25-Jan-14 2:50:32 PM : Encoding Failed
Could not read from the source. Please check if it has moved or been deleted.
i have tried creaeted a NEW Premiere Pro project and still get the same error again ... can someone help me to figure out what is wrong ...

Hi Neil
I have been using file names with spaces and it has been working fine. As stated in reply to Jones, uninstall and reinstall of Premiere Pro CS4 has helped to get rid of this error.
also i did not use Dynamic link, but was trying to create MPEG file using Media Encoder and then import it in Encore.
your suggestion for H264 seems good and will try it.
x264 Pro is for CS5 and above versions, so it seems i can not use it and have to manage with Adobe Media Encoder's default. Hope i will not have any major technical issues.
please suggest me for below:-
1) i have 4 hours of Full HD footage and made 1080i MPEG2 files of 30mbps to fit in 2 seperate Bluray Disks.
2) now i plan to put all in one Single Bluray Disk by reducing MPEG2 file average data rate to 15mbps. will that work or is there any limitation of time in Bluray Disk.
3) Will it be ok to create H264 files at 30mbps [as you mentioned H264 reduces file size to half of MPEG] and still be able to fit 4 hours footage in one BR Disk ?
4) even though i specify Min 10 Target 25 Max 30 data rate for MPEG files creation, it creats file at data rate of 30 mbps, can you explain why it is happening as i thought my target rate should be 25 mbps and not the maximum rate specified.
Thanks ...
PS...
my source file is .mov 1920 x 1080i 29.97 fps from Canon 6D. first i tried to create progressive file in Encoder but while imported in Encore realised at 29.97 fps, it allows only interlaced file and had to transcode back to interlaced. so i stick to interlaced file.
Canon 6D also allows me to shoot in 24fps [motion movie] which Encore can handle as progressive file for authoring. What are the pro and cons of shooting in 24fps, if you can suggest.
Message was edited by: AnilHVarma

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