Array from index 1 to x

Hi
is there a way to create arrays from index 1 to something, like
double[][] data = new double[1:2][1:64]I can, off course, create an array like
double[][] data = new double[3][65];
but this will cost me a lot of rewriting.
Luca

> double[][] complex = new double[2][<huge number>] >changing the 2 into a 3 would increase the array a lot, and slow-down the program even more memory).
Well, if you really have to, you could always do this -- double[3][] = { null, new double[<huge number>], new double[<huge number] }; This way it would only cost you one 32 bit reference. I don't find it very elegant though ...
kind regards,
Jos

Similar Messages

I need help with event structure. I am trying to feed the index of the array, the index can vary from 0 to 7. Based on the logic ouput of a comparison, the index buffer should increment ?

I need help with event structure.
I am trying to feed the index of the array, the index number can vary from 0 to 7.
Based on the logic ouput of a comparison, the index buffer should increment
or decrement every time the output of comparsion changes(event change). I guess I need to use event structure?
(My event code doesn't execute when there is an event at its input /comparator changes its boolean state.
Anyone coded on similar lines? Any ideas appreciated.
Thanks in advance!

You don't need an Event Structure, a simple State Machine would be more appropriate.
There are many examples of State Machines within this forum.
RayR

Adding data to array from an empty query

I am trying to add data to an array from a database query, however some queries will return no data (empty set). In that case I would like to add fake data so that the index size matches my other array (assetsid).
Thank you for your time.
     int f2a=0;
     String[] exportedtime;
     String[] exportedtime_formated;
     ArrayList exportedtime_ar = new ArrayList(f2a);
     ArrayList exportedtime_formated_ar = new ArrayList(f2a);
     for (int jj=0; jj<assetsid_ar.size(); jj++)
          String eng_id_out = (String) eng_id_h2a_ar.get(jj);
          String fuel2a = "select engineserialnumber, TO_CHAR(exportedtime, 'MM/DD/YYYY HH24:MI:SS') exportedtime, TO_CHAR(exportedtime, 'DD/MON/YY') as exportedtime_formated from tblexportedjobs where exportid = (select max(exportid) from tblexportedjobs where engineserialnumber = "+eng_id_out+") and engineserialnumber = "+eng_id_out+"";
          ResultSet fuel2a_myResultSet = stmt.executeQuery(fuel2a);
              while (fuel2a_myResultSet.next()) {
               f2a=f2a+1;
               exportedtime = new String[f2a+1];
               exportedtime_formated = new String[f2a+1];
               exportedtime[f2a]=fuel2a_myResultSet.getString("exportedtime");
               exportedtime_formated[f2a]=fuel2a_myResultSet.getString("exportedtime_formated");
     if (exportedtime[f2a].equals("")) {
    exportedtime[f2a] = "01/01/2004 00:01:01";
     } else {
     exportedtime[f2a] = exportedtime[f2a];
               exportedtime_ar.add(exportedtime[f2a]);
     if (exportedtime_formated[f2a].equals("")) {
    exportedtime_formated[f2a] = "01/JAN/04";
     } else {
     exportedtime_formated[f2a] = exportedtime_formated[f2a];
               exportedtime_formated_ar.add(exportedtime_formated[f2a]);
     }

I'd be curious to know if it would be possible to rewrite your query using a JOIN so you could get all the data in one query. The way you've written it will require N network round trips, where N is the number of engine serial numbers. I wonder if clever application of a JOIN with a GROUP BY would do the trick in one?
I don't care for the formatting stuff you're doing, either. There's no need to ask the database for that. Bring the dates over and handle the formatting in Java using java.text.SimpleDateFormat. Less work for the database AND it won't be so tied to Oracle, since you won't need that TO_CHAR function anymore.
I'd give clients the raw java.sql.Date and let them worry about formatting it the way they wish. That's not a persistence concern.
I always prefer data structures like List and Map when I'm working with database result sets. They grow to fit the # of records that I get back. If I want arrays, I can always use the toArray() method to generate them.

Question-Creatin array from a large # of scalars

Hello
I am developing LV code, where a large number of calculations are being done
in various ways as scalars. I would like to assemble these (say about 200
such) into a 1D array. I want to avoid using Build Array with 200 element
inputs. Also, these are not being generated within a For-Next loop to be
able to use the auto-indexing function or shift-registers.
Is there a relatively simpler way to create a 1D array from a large number
of scalars?
Reason I want to do this, is to make it easy to pass this array to other
vi's via a connector output or store to like a spreadsheet or send to a
printer.
TIA
Khan Kabir
Xerox Corp.

Hi Khan,
you can use Vi-Server to automatically build an array of values contained in controls or indicators of your front panel.
I attach a vi in LV6 that:
- Creates an array of references of all the front panel controls and indicators
- Extracts the values of a determined number of controls/indicators
- Converts each value in a DBL format (of course it can be changed)
- Builds an array of values extracted
N.B. the order of the references array refers to the order of the controls/indicators on your panel. It's important that you set correctly the panel order to make this vi build an array of the wanted controls/indicators; to access panel order: Edit - Set Tabbing Order. If for instance you want to make an array of 5 controls but in your panel you have a boolean at
order #3 you will get an error ( you can't convert a boolean to DBL...)
Let me know if you need more help.
good luck,
Alberto
Attachments:
building_controls_array.vi ‏35 KB

Programmatically create array from common cluster items inside array of clusters

I have seen many questions and responses on dealing with arrays of clusters, but none that discuss quite what I am looking for. I am trying to programmatically create an array from common cluster items inside array of clusters. I have a working solution but looking for a cleaner approach. I have an array of clusters representing channels of data. Each cluster contains a mixture of control data types, i.e.. names, types, range, values, units, etc. The entire cluster is a typedef made up of other typedefs such as the type, range and units and native controls like numeric and boolean. One array is a “block” or module. One cluster is a channel of data. I wrote a small vi to extract all the data with the same units and “pipe” them into another array so that I can process all the data from all the channels of the same units together. It consists of a loop to iterate through the array, in which there is an unbundle by name and a case structure with a case for each unit. Within a specific case, there is a build array for that unit and all the other non-relevant shift registers pass through. As you can see from the attached snapshots, the effort to add an additional unit grows as each non-relevant case must be wired through. It is important to note that there is no default case. My question: Is there a cleaner, more efficient and elegant way to do this?
Thanks in advance!
Solved!
Go to Solution.
Attachments:
NI_Chan units to array_1.png ‏35 KB
NI_Chan units to array_2.png ‏50 KB

nathand wrote:
Your comments made me curious, so I put together a quick test. Maybe there's an error in the code (below as a snippet, and attached as a VI) or maybe it's been fixed in LabVIEW 2013, but I'm consistently getting faster times from the IPE (2-3 ms versus 5-6ms for unbundle/index). See if you get the same results. For fun I flipped the order of the test and got the same results (this is why the snippet and the VI execute the tests in opposite order).
This seems like a poster child for using the IPES! We can look at the index array + replace subset and recognize that it is in place, but the compiler is not so clever (yet!). The bundle/unbundle is a well-known "magic pattern" so it should be roughly equivalent to the IPES, with a tiny penalty due to overhead.
Replace only the array operation with an IPES and leave the bundle/unbundle alone and I wager the times will be roughly the same as using the nested IPES. Maybe even a slight lean toward the magic pattern now if I recall correctly.
If you instantly recognize all combinations which the compiler will optimize and not optimize, or you want to exhaustively benchmark all of your code then pick and choose between the two to avoid the slight overhead. Otherwise I think the IPES looks better, at best works MUCH better, and at worst works ever-so-slightly worse. And as a not-so-gentle reminder to all: if you really care about performance at this level of detail: TURN OFF DEBUGGING!

Loading 7831R memory with contents of Array from Host VI?

Hi,
Can anyone help - how can I load the contents of an array in the
labview Host VI into the memory of the FPGA on the 7831 board? When I
try to do this in a FOR loop, and index each element, it says that the
array must be a fixed size for this target. How do I do this? I
initialise the array in an earlier sequence frame, and am reading from
a local variable.
Thanks for any advice,
Joe.

In LabVIEW FPGA all arrays must have a fixed size, because they are allocated as static memory on the FPGA. As much as possible you should avoid allocating (large) arrays in your LabVIEW FPGA diagram since this will use a lot of FPGA space; about 1% of the FPGA for every 4 bytes of array data.
Instead of using an array in your diagram you can use the Memory Read and Write functions which provide access to 16kB of memory which is separate from the FPGA.
If you want to use an array as you described, you should create an array constant in your diagram or an array control on your front panel. To set the size, right click on the array index display and select 'Set Dimension Size'. Select the fixed size and specify the number of elements in the array.
T
o pass values to an array on the diagram use the 'Array Replace Subset' function on the existing array.
If you have an array control on your front panel you can directly pass the whole array from your host application to the FPGA VI and do not need to pass individual array elements.
Christian L
NI Consulting Services
Christian Loew, CLA
Principal Systems Engineer, National Instruments
Please tip your answer providers with kudos.
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Calling Oracle 10g Stored Proc with Assoc Array from C# VS 2008

I have the following PL/SQL procedure:
CREATE OR REPLACE PROCEDURE HMA_ADM.PRC_VDM_SAVDEL_VEN_DOC
P_OP IN VARCHAR2,
P_USRID IN TB_VDM_MANAGE_DOCUMENTS.CREATEDBY%TYPE,
P_DATE IN VARCHAR2, -- HAS TO BE STRING, ELSE WE GET AN ERROR
P_DOCNAM IN TB_VDM_MANAGE_DOCUMENTS.DOCUMENT_NAME%TYPE,
P_DOCLNK IN TB_VDM_MANAGE_DOCUMENTS.DOCUMENTLINK%TYPE,
P_FNGUID IN TB_VDM_MANAGE_DOCUMENTS.FILENET_GUID%TYPE,
P_DESC IN TB_VDM_MANAGE_DOCUMENTS.DESCRIPTION%TYPE,
P_REQID IN VARR
) IS
Where VARR is:
CREATE OR REPLACE TYPE VARR IS TABLE OF INTEGER;
In C# I have the following code:
int64[] intReqID;
OracleCommand cmdVDL = new OracleCommand(DBQueries.SPQRY_SAVDELVENDOC, connDB);
cmdVDL.CommandType = CommandType.StoredProcedure;
cmdVDL.Parameters.Add(new OracleParameter("P_OP", strOP));
cmdVDL.Parameters.Add(new OracleParameter("P_CREATEBY", strUID));
cmdVDL.Parameters.Add(new OracleParameter("P_CREATEDATE", strDate));
cmdVDL.Parameters.Add(new OracleParameter("P_DOCNAM", strDocNam));
cmdVDL.Parameters.Add(new OracleParameter("P_DOCLNK", strURL));
cmdVDL.Parameters.Add(new OracleParameter("P_FNGUID", strGUID));
cmdVDL.Parameters.Add(new OracleParameter("P_DESC", strDesc));
cmdVDL.Parameters.Add(new OracleParameter("P_REQID", OracleDbType.Int64) {
CollectionType = OracleCollectionType.PLSQLAssociativeArray,
Size = intReqID.Count(),
Value = intReqID,
DbType = DbType.Int64,
OracleDbType = OracleDbType.Int64
OracleParameterStatus[] stat = new OracleParameterStatus[intReqID.Count()];
for (i = 0; i < intReqID.Count(); i++) {
stat[i] = OracleParameterStatus.Success;
cmdVDL.Parameters["P_REQID"].ArrayBindStatus = stat;
cmdVDL.ExecuteNonQuery();
When I run this I get the following error:
ORA-06550: line 1, column 7:
PLS-00306: wrong number or types of arguments in call to 'PRC_VDM_SAVDEL_VEN_DOC'
ORA-06550: line 1, column 7:
PL/SQL: Statement ignored
If I remove the Associative Array from both, the procedure runs fine.
What am I doing wrong?

Additionally,
1) UDT support requires 11106.20 or higher ODP (but can be used against 10g db)
2) if the plsql is changeable, you may want to swap it to associative array instead to avoid having to create custom classes for the UDT, and here's a short sweet example.
Greg
CREATE or replace PACKAGE MYPACK3 AS
TYPE numarray is table of number index by BINARY_INTEGER;
PROCEDURE getempsinarray(thearray IN numarray, numrecs out number);
END MYPACK3;
CREATE or replace PACKAGE BODY MYPACK3 AS
PROCEDURE getempsinarray(thearray IN numarray, numrecs out number)
IS
begin
numrecs := thearray.count;
END getempsinarray;
END MYPACK3;
using System;
using System.Data;
using Oracle.DataAccess.Client;
public class indexby
     public static void Main()
      OracleConnection con = new OracleConnection("data source=orcl;user id=scott;password=tiger;");
      con.Open();
      OracleCommand cmd = new OracleCommand("mypack3.getempsinarray", con);
      cmd.CommandType = CommandType.StoredProcedure;
      OracleParameter Param1 = cmd.Parameters.Add("param1", OracleDbType.Int32);
      Param1.Direction = ParameterDirection.Input;
      Param1.CollectionType = OracleCollectionType.PLSQLAssociativeArray;
      Param1.Value = new int[3]{7369,7499, 7521};
      Param1.Size = 3;
      OracleParameter Param2 = cmd.Parameters.Add("param2", OracleDbType.Int32, DBNull.Value, ParameterDirection.Output );
     cmd.ExecuteNonQuery();
     Console.WriteLine("{0} records passed in",Param2.Value);
      con.Close();
}

Copy small array from cyclical queue

Hi,
I would like to know how to create a small array from a bigger one when the bigger one is cyclical. The problem is that i'm copying the values with Arrays.copyOfRange(array,from,to) until I end up to the final of the queue where it falls in a ArrayIndexOutOfBoundsException
Example:
cyclical_queue: [ 34 23 2 3 4 5]
if small_array has to be [4 5 34] i cannot use copyOfRange since it would end up in Arrays.copyOfRange(cyclical_queue,4,1) -> ArrayIndexOutOfBoundsException
P.S. I am trying to do it without loops since performance is important in my program
Thanks in advance for any help,
Rodo

Rodo1983 wrote:
I would like to know how to create a small array from a bigger one when the bigger one is cyclical. The problem is that i'm copying the values with Arrays.copyOfRange(array,from,to) until I end up to the final of the queue where it falls in a ArrayIndexOutOfBoundsExceptionYou can't use Arrays.copyOfRange for this if the array you're copying wraps around the end of the queue.
P.S. I am trying to do it without loops since performance is important in my programDon't bother. Looping isn't inefficient, and besides, I'm almost positive Array.copyOfRange() uses loops. Just start copying at the beginning index, wrapping to zero if you get to the end, and stop when you get to the ending index.

How can i get a array from a JSP ?

Hi all,
i have a STORED PROCEDURE like this:
static public void getMyArray(double [] xx) {
for (int i=0; i<myarr.length;i++){
myarr=3.145*i;
xx=myarr;
return ;
how can i get the array with XSQL and transform with a XSL ?
Is this at all possible?
Thanks for any help.
Achim

u r asking how ca u get array from jsp?
and u r asking xsql ...some stuff i couldnot understand .can u repeat the question properly?
null

How do I copy an array from a website to Excel using Firefox

Was running Firefox on Windows Vista. I could copy an array from finance.yahoo.com into an Excel spreadsheet by selecting the array with control key down then clicking on edit - copy selected cells, then pasting into an Excel sheet. I only had to tell it the upper left cell and the whole array went in properly
Now trying to do the same thing on a new machine running Windows 7, but the "copy selected cells" option is not available in the edit menu. Is there a way to copy an array with Firefox and Windows 7? These are big arrays. One cell at a time is out of the question.

Try this Add-on --> https://addons.mozilla.org/en-US/firefox/addon/dafizilla-table2clipboard/
'''If this reply solves your problem, please click "Solved It" next to this reply when <u>signed-in</u> to the forum.'''
Not related to your question, but...
You may need to update some plug-ins. Check your plug-ins and update as necessary:
*Plug-in check --> http://www.mozilla.org/en-US/plugincheck/
*Adobe Shockwave for Director Netscape plug-in: [https://support.mozilla.org/en-US/kb/Using%20the%20Shockwave%20plugin%20with%20Firefox#w_installing-shockwave Installing ('''''or Updating''''') the Shockwave plugin with Firefox]
*'''''Adobe PDF Plug-In For Firefox and Netscape''''': [https://support.mozilla.org/en-US/kb/Using%20the%20Adobe%20Reader%20plugin%20with%20Firefox#w_installing-and-updating-adobe-reader Installing/Updating Adobe Reader in Firefox]
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*Next Generation Java Plug-in for Mozilla browsers: [https://support.mozilla.org/en-US/kb/Using%20the%20Java%20plugin%20with%20Firefox#w_installing-or-updating-java Installing or Updating Java in Firefox]

How to call a CString array from TestStand

I have a C++ DLL that uses a CString array, CString myString[ ], that I need to pass back to TestStand 4.0 for inclusion in my results database.
In the TestStand module definition the parameter argument Description comes up as a CStriing pointer (CString*) instead of a CStringArray.
When I put my array of strings into the Value Expression I get an error: Expected String, found Array of Strings.
I have no trouble passing just a string pointer but that's not working either.
Can someone help?
Thanks,
Steve S

Hi Steve,
I don't think that you can pass a CString Array from C++ DLL to TestStand 4.0 directly.
But you can do it another way: concatenate all Strings by a delimit in your CString Array to build a new String, then pass it to TestStand. In TestStand you can separate those Strings by the delimit, and rebuild a String Array.
For example:
// If this is your CString Array.
CString myString[] = {"AAA", "BBB", "CCC"};
// Build a new String in your C++, and pass it to TestStand.
char *myNewString = "AAA~BBB~CCC";
// Separate myNewString and build an Array in TestStand...
Hope that can help you!
Message Edited by My NI on 11-29-2007 11:34 AM
Regards
MY

Passing an array from Java to Pl/SQL Procdures

I am relatively new to the Java world and I am unable to pass back an array from Java back to the calling PL/SQL procedure. I have read many of the posts that deal with this issue and in specificly have viewed Ask Tom. My main issue is trying to get the data types matched up. I am able to return varchar2, numbers, and the like, but an array of filenames is not happening. I have tried a variety of "types" but unable to accomplish the task. Please help.
I have my Java class basically defined as:
public static oracle.sql.ARRAY[] getCollection(String directory)
throws SQLException
{ // provide a directory and get a listing of files
File path = new File( directory );
String[] list = path.list();
return list;
SQL Type and PL/SQL Procedure is:
CREATE OR REPLACE TYPE PTO_FILE IS TABLE OF VARCHAR2(100);
create or replace function get_dir_collection( p_directory in varchar2 ) RETURN PTO_FILE
as language java
name 'DirCollection.getCollection( java.lang.String ) return oracle.sql.ARRAY[]';
/

I know that it is not an ARRAY. It is however an "array" and I am attempting to map Java's String[][ to some "object" on the oracle side. I have looked at the link you sited and was not able to find the data mapping. I have found that mapping data types between different "languages" is some of the most difficult aspects of working with multiple languages.
Any suggestions? Thanks

Reading in an array from a text file

I'm trying to use a text file to load in some configuratin
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like gamename=Chess&gamescore=100 , etc... but some of the data
needs to be in an array. Can someone please point me in the right
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the easiest way is to create a string with the (soon-to-be)
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I'd like to move a set of disk with an existing Array from one Xserve RAID to another. Can I simply shutdown both Xserve RAIDs and move the disk over, assuming I put the disk back in the same order?

Yes, you should be able to do this.
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Calling an array from another class

Ok I have this little program that I created to display values stored in an array. Well, I want my array to automatically be populated with the same values that are in another array that resides in a different class. Here is my code for the class that I want the values to be displayed:
import javax.swing.*;
import java.awt.*;
public class GUIRead extends JFrame
     double[] interest = new double[3];
     MemicCSVReader[] interestObjectArray = new MemicCSVReader[3];
     interestObjectArray[0] = new MemicCSVReader();
     interestObjectArray[1] = new MemicCSVReader();
     interestObjectArray[2] = new MemicCSVReader():
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     JPanel display = new JPanel();
     JTextField interestText = new JTextField(10);
     JPanel display2 = new JPanel();
     JTextField interestText2 = new JTextField(10);
     JPanel display3 = new JPanel();
     JTextField interestText3 = new JTextField(10);
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          super("Test");
          setSize(160,200);
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          GridLayout config = new GridLayout(3,1);
          FlowLayout config2 = new FlowLayout(FlowLayout.LEFT,10,10);
          Container pane = getContentPane();
          pane.setLayout(config2);
          display.setLayout(config2);
          display.add(interestText);
          interestText.setText(interest[0]);
          interestText.setEditable(false);
          pane.add(display);
          display2.setLayout(config2);
          display2.add(interestText2);
          interestText2.setText(interest[1]);
          interestText2.setEditable(false);
          pane.add(display2);
          display3.setLayout(config2);
          display3.add(interestText3);
          interestText3.setText(interest[2]);
          interestText3.setEditable(false);
          pane.add(display3);
          setContentPane(pane);
     public static void main(String[] args)
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Here is my code that I want the double[] interest array to pull it's data from:
public class MemicCSVReader
     double interestArray[];
     MemicCSVReader()
          String[] interestString = {"5.5","5.35","5.75"};
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               interestArray[x] = Double.parseDouble(interestString[x]);
}

Ok, thanks for your help. Now I have another problem. I can't get the values to display. Here is my code:
This is the program that runs the application:
import javax.swing.*;
import java.awt.*;
public class GUIRead extends JFrame
     MemicCSVReader readCSV = new MemicCSVReader();
     double[] interestDouble = readCSV.getInterestArray();
     String[] interest;
     JPanel display = new JPanel();
     JTextField interestText = new JTextField(10);
     JPanel display2 = new JPanel();
     JTextField interestText2 = new JTextField(10);
     JPanel display3 = new JPanel();
     JTextField interestText3 = new JTextField(10);
     public GUIRead()
          super("Test");
          setSize(160,200);
          setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          setVisible(true);
          GridLayout config = new GridLayout(3,1);
          FlowLayout config2 = new FlowLayout(FlowLayout.LEFT,10,10);
          Container pane = getContentPane();
          pane.setLayout(config2);
          display.setLayout(config2);
          display.add(interestText);
          interestText.setEditable(false);
          pane.add(display);
          display2.setLayout(config2);
          display2.add(interestText2);
          interestText2.setEditable(false);
          pane.add(display2);
          display3.setLayout(config2);
          display3.add(interestText3);
          interestText3.setEditable(false);
          pane.add(display3);
          setContentPane(pane);
     public void actionPerformed()
          for(int x = 0; x < 3; x++)
               interest[x] = Double.toString(interestDouble[x]);
          interestText.setText(interest[0]);
          interestText2.setText(interest[1]);
          interestText3.setText(interest[2]);
     public static void main(String[] args)
          GUIRead run = new GUIRead();
This is the file that it pulls the array from:
public class MemicCSVReader
     private double[] InterestArray = new double[3];
     MemicCSVReader()
          double[] InterestArray = {5.5,5.35,5.75};
     public double[] getInterestArray()
          return InterestArray;
}

Array from index 1 to x

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