Extract arrays according the number of consecutive values

Question

Hello I would need some help on one problem to search the
number of consecutive values in an array. I am using Labview 8.1
First I have a 2D array with 3 columns: Col (A)  Col (B) 
Col (C). I would like to plot points from Col( B)=f(ColC) at Constant
value in Column A. The problem is that in Column A the values changes. My
problem is to extract arrays when the values in column A are the same and when
the number of values is higher than a number that I can choose. In my case I
chosse this number by the threshold function on the peak detector.
Let ‘s take an exemple:
Col (A)            Col(B)              Col(
C)
12                    343                  45
654                  65                    33                               
121                  65                    65                   
18                    31                    45                   
12                    456                  98       
787                  361                  787
121                  156                  123     
12                    32                    545
Let ‘s say I want to plot Col(B)=f( Col(C)) at constant value in
Column A when I have more than 2 constant values in Column A
The aim would be to have different arrays to plot 2
different graphs for different constant value in Col( A).
Col (A)            Col
(B) Col( C)                        Col (A)            Col(B)              Col(C)
12                    343                  45                       121                  65                    65       
12                    456                  98           &          121                  156                  123
12                    32                    545
 What I do with the VI is:
1)      sort
 the 2D arrays accordind the values in
the Col (A) and extract Col(A)
2)      Search
the index of elements in Column A when they I do not have consecutive values
3)      Subtract
each new indexes indexes 2 by 2: this gives me the number of consecutive values
in a new array.
4)      Detect
the indexes of the peak (number of consecutive values) that I want (in the
exemple= 2)
My problem is now to come back in
the initial array and extract the arrays that has more than n  consecutive values
(n=2 in the exemple) according to the index found by the peak values.
 I am sure that there is a simpler
and better way to do this (maybe by a for loop or by using an histogram);
Thank in advance for the help
Olivier
Attachments:
extract values.vi ‏33 KB

Answer 1

First, I wanted to thank you, Kumar for the quick answer: 5
stars for the answer, this is exactly what I was looking for. I would not have
found it by myself.
I have an other problem to plot now Col( B)=f (Col( C))
What I would like to do is plot Col (B)=Col (C) with
different plots (colour) on a same graph when the value in column A changes.
I managed to have 2 arrays (thanks to the forum with some
modifications):
-One to tell me each first indexes when the value changes
-One to tell me each last indexes when the values changes
My idea would be to use theses indexes to split the initial
array by  a loop when the value in Column
A changes and then in an other loop  (or
in the same) connect the XY graph to the build arrays.
The only problem is that before running Labview I do not
know how many different values in column A I have so I do not know how many
arrays will be created when I will try to split the initial array.
Is someone know if this solution is possible?
Thank you in advance for the help.
Olivier