Row or columns of 2d array to graph

Hello
I tried to plot the values of a certain row of a 2d array in a xy graph. The x-axis should display the column-indexes and the y-axis the values of the elements of the row. The rowindex can be selectable by the user.
Can somebody help me?
Thx
Using Labview 7.1

This should Do
Look at attached pic
First index out that row>> determine its size>> generate a 1 D array column indices as shown>> bundle these two arrays and plot on graph
regards
Dev
Message Edited by devchander on 09-06-2006 04:31 AM
Attachments:
xy_2D.PNG ‏8 KB

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Remove specific row and column from 2d array

Hi,
I would like to know how to remove the specific row and column from 2d array.
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2 -1 -1 0
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-1 -1 2 0
-1 -1 -1 3
let say that i want to remove row 2(bold) and column 2(bold), and the new 2d array should get as below
2 -1 0
-1 2 -1
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Thanks.

You can't remove elements of an array, it's fixed at a certain size once created. What you can do however is make a new array and only copy the things you want. Something like:public static void main(String[] args) {
    Integer[][] bar = new Integer[5][5];
    for (int i = 0; i < bar.length; i++) {
        Integer[] baz = bar;
Arrays.fill(baz, i);
System.out.println(Arrays.toString(baz));
Integer[][] muu = new Integer[5][4];
removeColumn(3, bar, muu);
for (Integer[] mee : muu) {
System.out.println(Arrays.toString(mee));
Integer[][] smuu = new Integer[4][5];
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public static <T> void removeRow(int row, T[][] a, T[][] result) {
if (row >= a.length) {
throw new IllegalArgumentException("no row at " + row);
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if (a_r == row) {
continue;
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result_r++;
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for (int i = 0; i < a.length; i++) {
if (col >= a[i].length) {
throw new IllegalArgumentException("no column at [" + i + ", " + col + "]");
for (int a_i = 0, r_i = 0; a_i < a[i].length; a_i++) {
if (a_i == col) {
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result[i][r_i] = a[i][a_i];
r_i++;

Get the intersection when u know row and column in 2D array

I am trying to get the intersection of the row and column and I am not able to do so......
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123456789 <<These in array indicate the row
255555555
388888888
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I want to get 7 which is the intersection of column 6 and row 4............Please help

Hi Marlin..
I am reading this after having done it in a very similar way....... thank you so much
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Summing the Rows and Columns in an Array

I am importing a 2-dimensional array of integers.(which is held in a 2-dimensional array)
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I can get the integers in and print out a list along with the grand total(sum of all).
But, how do I pass each row's and each column's value in to my sumRow and sumCol methods to get the sum for each row and each column?
Can I do the row and column summing in the same "for" statement where I calculate the "grand total"? Or am I making this more difficult than it is?
Would appreciate any help.
This is what I have so far:
import java.awt.Graphics;
import java.applet.Applet;
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for(int j = 0; j < data.length; j++){
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grandTotal += cell[i][j];
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System.out.println(grandTotal);
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public int sumCol(int [] data3){
     int colaccumulator = 0;
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Thanks for your input.
I'll make the changes that you suggest.(after this)
My output prints:
4 6 3 8 21
9 1 5 3 18
13 7 8 11 39
numbers are right, but I need to format the table
the output needs to look like this:
int int int int | rowsum
int int int int | rowsum
colsum colsum colsum colsum | total
How do I do this?
I have no idea?
I'm supposed to call a "void setMargins( )" method to line this up, without
using the exotic formatting in the IO library.
I'm also supposed to use "public String toString( )"
This is what I have so far:
import java.awt.Graphics;
import java.applet.Applet;
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int numRows;
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System.out.println(rowSum[i] + " ");
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Getting row and column of an array element

Hi,
I have an array of 24 rows and 24 column giving me a total of 576 elements. How do I get the row and column of a particular element in an array in LabView. E.g. If I have to write to element 127 how do I get the column and row in which element 127 is located.
Regards,
Harshil
Solved!
Go to Solution.

Hi Harshil,
maybe you only need to find the correct "address" of the element in your 2D array?
Use something like this:
Maybe you have to switch Row&Column output according to your numbering scheme...
Best regards,
GerdW
CLAD, using 2009SP1 + LV2011SP1 + LV2014SP1 on WinXP+Win7+cRIO
Kudos are welcome

Search row and column for return value

Dear Sir/Madam,
                           I have a problem for searching spreadsheet and hope you can help me out a bit. Im pretty new to Labview and Im currently using Labview 8.0. My task is to search the spreadsheet I have attached in row and column-wise, then return the corresponding value out. I had an attempt in doing this as you can see from the vi that i have attached. I try inputting the 'read from measurement file' into an array and using delete, index and search array I will be able to find the index value for the relevant row and column that i searched for by inputting them into an index array with the orginal array from the 'read from measurement file'.
                          So ultimately, when i enter a row value of 0.5 and a column value of 0.3, my output will be 1.688.
                          I can't see any mistakes in my logic but I getting really strange results, like I can read my data has been entered into an array but when i try deleting the first column and put it into another array, the orginal array with nothing deleted is outputted hence making my search to give out -1 value. So could you take a look please and give me any suggestion that can solve my problem or enhance the code a bit. Thank you for your time.
Best Regards,
Coato
P.s for some reason i can't attached the .lvm file of my data hence i have attached the excel version but i think you need to convert it back to .lvm for the 'read from measurement file' function to work.
Attachments:
Backswing compensation.csv ‏10 KB
Backswing comnpensation2.vi ‏109 KB

Your VI makes absolutely no sense to me, but maybe I don't understand what you are trying to do.
You seem to have dynamic data with 6 signals and 48 points/channel. Now you reshape this into an array of dynamic data with 4x13 elements from which you slice out one row or column, resp. "delete from array" is NOT the correct tool to do this, use "Index array" with one index unwired to get a row or column as 1D array.
So you end up with two 1D arrays of dynamic data that you search for DBL. It is difficult to understand how you want to search for an array element that corresponds to a scalar DBL value of 0.1. Your array elements are NOT DBLs but dynamic data, each containing many signals!
There are two elements on all your data that are "3", the rest are zero. You will never find anything that is 0.1.
Maybe you can convert your original dynamic data to a 2D array with "rows are signals" using "convert from dynamic data", then operate on the 2D array.
Coato wrote:
                          So ultimately, when i enter a row value of 0.5 and a column value of 0.3, my output will be 1.688.
Sorry, Please explain.
Please make a VI containing a simple 2D aray as diagram constant that contains e.g. 5x5 typical values. Let us know what kind of result you expect from your algorithm..
LabVIEW Champion . Do more with less code and in less time .

Excel & ActiveX: Insert arbitrary columns from 2D array and create graph problems

Hi there,
I want to insert data from either a 1D or 2D array from LabView into Excel and create graphs.
I used the information from the following example:
http://www.ni.com/example/28934/en/
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Now I also would like to write a 2D array - so the first column in Excel should be the first column from the array and so. Here I cannot use the loop counter directly as Excel only counts 1,2,... for the rows, but uses A,B,... to count columns. Also I do not know in advance how many columns my 2D array will contain, so creating a lookup table like (A means 1, B means 2,...) is not really an option (except there really is no other way). Is there a possibilty to convert numbers into letters or some way to 'explain' to the program that column 2 in the array means column B in Excel for example, or is there a way to insert new columns?
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http://www.ni.com/newsletter/51339/en/
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To explain my problems better I added a snippet showing my two problems: The inner of the two while loops shows how I import a 1D array. In the outer loop I seperate the columns. I know that currently this is not working as all data end up in column A of the Excel sheet - so I would need to convert the number of the outer counter to A, B,... or find a different solution.
Moreover on the snippet I placed an ActiveX Worksheet Property with the Chart Object - as I can see the difference to the Chart Object in the example code from the last link above is the color. However I'm not sure what that means and how to change/ solve this.
And just to make sure - I know this way the VI does not run as the Chart Object is placed completely wrong - I just did it, so it is included in the snippet.
I'd be thankful for any suggestions,
Thanks!
Solved!
Go to Solution.
Attachments:
ExcelAreaScan.png ‏60 KB

Hello everyone and thanks for the answers.
I only have the LabView Student Edition available here - is the toolkit included in it too. How can I check if it is installed/ available and in case it is installed - where can I find it?
Today I had time to take a look at the example
Create via ActiveX Labview a XY Scatter plot graph on an excel sheet
It almost does what I want in terms of creating a graph. The only problem I could not fix, is that in this example a sheet is created where only the graph is present. i'd like to add the graph to a previously created worksheet. Today I tried get this working but it seems I stilll don't really understand what I'm doing, I'll post a snippet of my code as soon as I can access the PC with LabView on it again.
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Thanks for the help so far!

How to get number of rows and columns in a two dimensional array ?

Hello,
What would be the simplest way to get number of rows and columns in a two dimensional array represented as integers ?
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Regards,
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Hi Petri,
See a attached txt file for obtaining two arrays with upper and lower index values
Regards
Ray
Regards
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Get2DArrayIndex.txt ‏2 KB

Hi, how can i break the value for a row and column once i have converted the image to the array???????

Hi, I would like to know how can i break the value for a row and column once i have converted the image to the array. I wanted to make some modification on the element of the array at a certain position. how can i do that?
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Hi,
Thanks for your reply.Sorry for the confusion.
I manage to change the array element by changing the row and column value. But, what i want is to allow the program to change the array element at a specified row and column value, where the new value is generated automatically by the program.
Atatched is the diagram. I've detailed out the program . you may refer to the comments in the formula node. There are 2 arrays going into the loop. If a >3, then the program will switch to b, where if b =0, then the program will check on the value of the next element which is in the same row with b but in the next column. But if b =45, another set of checking will be done at a dufferent value of row and column.
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Hope you can help me. Thank you!!!!
Attachments:
arrayrowncolumn2.JPG ‏64 KB

I need to take elements from within 2 nested for loops and place them in an array at the specific row and column that I need.

I have tried intializing an array and replacing elements by specifying a particular row, and column, but in the end I get an array with only one element replaced, and I suspect that it is because as the for loops are running through their iterations each time the array is re-initializing. I have a simple vi that I will post below, it is not the exact situation that I have but is a good place for me to get some understanding. I have the row and column indexes being driven by the inner and outer loop iterations, which gives me the pattern I need. I am using the inner iterations as array elements. How do I set this up so that it works and d
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Attachments:
Untitled.vi ‏26 KB

I have fixed a number of things in your vi.
You were right in thinking that the array was continuously re-initialized. To avoid this, use a shift register (right-click the loop border), which will pass the updated array into the next iteration.
Chilly Charly (aka CC)
E-List Master - Kudos glutton - Press the yellow button on the left...
Attachments:
your_vi.vi.zip ‏13 KB

Row and Column detection of a 2D boolean array

I use an array as showed by my example (LB8.2).
Press a 1 or 0 in the array changes it's value and it gives
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I use this to program a 22 channel patterngenerator (GPIB).
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Here is a different way
Tim
Johnson Controls
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Attachments:
MyRowColDetection Rev TLE.vi ‏15 KB

Arrays[][] - row and column

Evening All...
Just a quick question regarding arrays. My program is working but I am trying to tidy it up.
public class Arrays{
static int firstArray[][]= new int [][] {{8,5},{9,3}};
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- you can use variables to specify array dimensions
- you can get the (1D) dimension of an array by using the "attribute" theArray.length . Knowing that a 2D-array is indeed an array of arrays, you can indirectky get the size oif the second dimension too:
public static void multiply( int[][] x, int[][] z)
int array2[][] = new int [x.length][x[0].length];
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Regards,
J
Edited by: jduprez on Mar 14, 2011 10:45 PM
And please, in the future, use tags around code text, when posting code

Help! Inserting a 1-D comment array into a 2-D string array at specified row AND column

Hello everyone,
I am writing a 2-D string array to excel and i need a way to add comments to my file like this:
SLAM NAME G Level Comments
1 RALF 26
1 RALF 26
1 RALF 26
1 RALF 26
For some reason, i cannot specify a row AND column to write because:
When i use replace array subset it only replaces 1 element at my index.
When i use replace array subset with a loop, it creates empty spaces until it reaches the end of the array it is replacing.
When i use Insert into array: i cannot wire 2 inputs for row and column.
In my complete VI i will need to write from row 1-1001, a different comment from 2-2002, a different comment from 3-3003, etc until a stop condition is met so i need to figure out how to do this programatically and not have it replace any elements outside of the range or it will override previous commetns.
I am at a loss of what to do. Any and all suggestions are greatly appreciated.
Thanks!
Solved!
Go to Solution.
Attachments:
array.vi ‏13 KB

Hi proph,
I made a small subtile change to yur VI and now it replaces all values of the 4th column…
THINK DATAFLOW!
Use shift registers when you need to propagate values from one loop iteration to the next!
USE/LEARN DEBUGGING TECHNIQUES!
There are tools like probes and highlight to understand your VI execution and to find problems…
Go through all those free online courses offered by NI!
Best regards,
GerdW
CLAD, using 2009SP1 + LV2011SP1 + LV2014SP1 on WinXP+Win7+cRIO
Kudos are welcome
Attachments:
array.vit ‏12 KB

Get Row and Column info from an Array Cluster

I have an array with a cluster of 2 elements (string and double). Within my application, I am using the State Machine architecture with an Event Structure. When I click on a element within the cluster array, is there a way to retrieve the row and column? I seen the Coordinates within the Mouse Down event but I don't think that will work.
Any ideas?
Solved!
Go to Solution.

How To Return the Index of a Mouse-Select Array Element:
https://decibel.ni.com/content/docs/DOC-6406
Jean-Marc
LV2009 and LV2013
Free PDF Report with iTextSharp

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kris

Hi Kris,
This is a limitation with Export to PDF. Plz. go thru' below link.
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