How to read time stamps from a spreadsheet and calculate the difference between consecutive time stamps?

Hi,
I am new to Labview. This question might be a joke to some of you here, but any help would be greatly appreciated. I have a spreadsheet with time stamps and power outputs from a generator. I am supposed to calculate the difference between consecutive time stamps, which will act as a delay for the next power output update that needs to be sent. For example, lets say that I have to following data:
Time Stamp                    Power Output
11:00:00 AM                       3kW
11:00:02 AM                       2.9kW
11:00:04 AM                       3.2kW
11:00:06 AM                       3.1kW
The above data doesn't make any sense, but it is just for the purpose of this question.
So, I have to read 11:00:00 AM and 3kW initially - 3kW is the initial request that is sent. Then I have to

Repeated forum post
Please view http://forums.ni.com/ni/board/message?board.id=170&message.id=294435
Regards,
Juan Galindo
Applications Engineer
National Instruments

Similar Messages

How to read time stamps from a spreadsheet and calculate the difference between consecutive time stamps?

Hi,
I am new to Labview. This question might be a joke to some of you here, but any help would be greatly appreciated. I have a spreadsheet with time stamps and power outputs from a generator. I am supposed to calculate the difference between consecutive time stamps, which will act as a delay for the next power output update that needs to be sent. For example, lets say that I have to following data:
Time Stamp                    Power Output
11:00:00 AM                       3kW
11:00:02 AM                       2.9kW
11:00:04 AM                       3.2kW
11:00:06 AM                       3.1kW
The above data doesn't make any sense, but it is just for the purpose of this question.
So, I have to read 11:00:00 AM and 3kW initially - 3kW is the initial request that

Hello
you can simple subtract one time from the other one and so you get the difference. -> Example
Mike
Attachments:
Unbenannt 2.vi ‏8 KB

How do I calculate the difference between two times?

I am so embarrassed by the fact that I can't figure this out.
Cell B2- 8:00 am
Cell C2- 10:50 am
Cell D2- (How do I get this cell to calculate the difference and say 2:50?)
I know this is probably one of the most basic operations, but for the life of me I can't figure it out. Cells B2 & C2 are formatted for 24 hour clock. But if I tell the system to just subtract the two, I get "0.118". Everything I find on the forum search goes beyond what I need. Can anyone help me?
Thank you.

KOENIG Yvan wrote:
Numbers states clearly in the Help and the PDF Users Guide that it doesn't know a "duration" object but a time one which is restricted to the range 00:00:0 to 23:59:59.
When I search the U.S. language Numbers User Guide for the word "duration," it is not found.
What may be more clear: _duration is not available but time is_?
Once again your response resemble to a rant againt the Help and the User Guide.
In the Help:
+date-time Any Numbers date/time value. _While you can choose to display only date or time in a cell, all Numbers date or time values contain both the date and time._+
Which wording would be more clear and precise?
TIMEVALUE
+The TIMEVALUE function converts a date, a time, or a text string to _a decimal fraction of a 24-hour day._+
Which wording would be more clear and precise?
TIME
+The TIME function converts hours, minutes, and seconds into a time format.+
+TIME(hours, minutes, seconds)+
+hours: The number of hours _(using a 24-hour clock)._+
+minutes: The number of minutes.+
+seconds: The number of seconds.+
Notes
+You can specify hour, minute, and second values greater than 23, 59, and 59, respectively. _If the hours, minutes, and seconds add up to more than 24 hours, Numbers subtracts 24 hours repeatedly until the sum is less than 24 hours._+
Which wording would be more clear and precise?
In the User Guide:
page 190
+date-time Any Numbers date/time value. _While you can choose to display_+
+_only date or time in a cell, all Numbers date or time values contain_+
+_both the date and time._+
+TIME (page 277) Converts a time to a decimal fraction of a 24-hour day.+
+TIMEVALUE (page 278) Converts a time in a string to a decimal fraction of a 24-hour day.+
TIME
+The TIME function converts the specified time to a decimal fraction of a 24-hour day.+
+TIME(hours, minutes, seconds)+
+• hours: The number of hours _(using a 24-hour clock)_.+
+• minutes: The number of minutes.+
+• seconds: The number of seconds.+
Notes
+You can specify hour, minute, and second values greater than 23, 59, and 59,+
+respectively. _If the hours, minutes, and seconds add up to more than 24 hours,_+
+_Numbers subtracts 24 hours repeatedly until the sum is less than 24 hours._+
+You can also specify fractional values for hours, minutes, or seconds.+
TIMEVALUE
+The TIMEVALUE function converts a time in a string to a decimal fraction of a 24-hour+
day.
TIMEVALUE(date-time)
+• date-time: A date, a time, or a string in any of the Numbers date and time formats.+
As you may check, the infos are exactly the same in the Help and in the Guide.
And I really don't understand how you may find them unclear.
Yvan KOENIG (from FRANCE lundi 4 août 2008 14:57:36)

I've never seen flex for sell.. how do I obtain a copy of it and whats the difference between it and flash?

Hey;
I've heard great stuff about flex but I've never seen it for sale. I've read that it is better for real time programs than flash. I don't know if thats true or not. What does flex offer that flash doesn't and how is the flex language better than the flash language? Or am I totally confused and is flex like an addon to flash??? any guidance would be really appreciated. I'm working on something Object oriented that needs to be in real time so I'm looking for the best program that offers that.

I'm pretty new at all thsi stuff too, and all these terms killed me for my first few weeks in this arena, but I've got my feet under me now.
Flex is an opensource SDK provided by Adobe (previously Macromedia). It used to be something they sold, but they opensourced it, Hoorah!!
Flash is the set of APIs that start with flash.*, and you can fully create flash animations with just the standard flash APIs.
Flex comes with a ton of very useful components, features, and functionalities that are built on top of flash. You should definitely download and get familiar with flex.
The flex api's start with mx.*
Flex also provides the ability to compile MXML documents into flash. MXML documents make it very easy to build Flash, full with animations, customizations, etc. in an HTML-like format. Take a look at the component explorer link below and you'll see the MXML generated for the example components. You can copy and paste that MXML (simple looking stuff eh?) and get a working app that you can expand on and play with as you learn.
Here are a few helpful links to get you moving in the right direction:
An interactive list of GUI components available in Flex (Flex isn't limited to just GUI components, but this is a nice place to whet your appetite):
http://examples.adobe.com/flex3/componentexplorer/explorer.html
http://examples.adobe.com/flex3/consulting/styleexplorer/Flex3StyleExplorer.html
A good list of Flex links:
http://seantheflexguy.com/blog/2009/02/27/how-do-i-learn-flex/
The documentation available from Adobe is second to none:
http://www.adobe.com/devnet/flex/quickstart.html
http://livedocs.adobe.com/flex/3/html/help.html?content=Part2_DevApps_1.html

How do I extract email from a form and send the PDF to that user?

How do I extract email from a form and send the PDF to that user?

here you can add email to send to, CC, Subject, and body message
var oDoc = event.target;
                    oDoc.mailDoc({
                                                            bUI: false,
                                                            cTo: "Agency Contact Email",
                                                            cCC: "",
                                                            cSubject: "Write your title here,
                                                            cMsg: "Dear" + AgencyContact + "(" + AgencyContactEmail + ")\nThe student, " + FirstName + " " + LastName + " has applied to work at your agency. Please confirm they can work here blah blah blah.......\n\nThanks.\n\nrespectuflly,\n\nme"

Extract Time from date and Time and Need XLMOD Funtion to find the Difference between Two Time.

X6 = "1/5/15 5:16 AM" & NOW ....................difference by Only Time
not date
X6 date and Time will be changing, Its not Constant
Dim myDateTime As DateTime = X6
            Dim myDate As String = myDateTime.ToString("dd/MM/yy")
            Dim myTime As String = myDateTime.ToString("hh:mm tt")
            Dim myDateTime1 As DateTime = Now
            Dim myDate1 As String = myDateTime1.ToString("dd/MM/yy")
            Dim myTime1 As String = myDateTime1.ToString("hh:mm tt")
Need to use this function to find the Difference between Two Time. due to 12:00 AM isuue
Function XLMod(a, b)
    ' This replicates the Excel MOD function
    XLMod = a - b * Int(a / b)
End Function
Output Required
dim dd = XLMod(myTime - myTime1)
Problem is myTime & myTime1 is String Need to convert them into Time, Later use XLMOD Funtion.

Induhar,
As an addendum to this, I thought I'd add this in also: If you have two valid DateTime objects you might consider using a class which I put together a few years ago
shown on a page of my website here.
To use it, just instantiate with two DateTime objects (order doesn't matter, it'll figure it out) and you'll then have access to the public properties. For this example, I'm just showing the .ToString method:
Option Strict On
Option Explicit On
Option Infer Off
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, _
ByVal e As System.EventArgs) _
Handles MyBase.Load
Dim date1 As DateTime = Now
Dim date2 As DateTime = #1/1/1970 2:35:00 PM#
Dim howOld As New Age(date1, date2)
MessageBox.Show(howOld.ToString, "Age")
Stop
End Sub
End Class
I hope that helps, if not now then maybe at some point in the future. :)
Still lost in code, just at a little higher level.
Thanx frank, can use this in Future....

How to find the difference between 2 time values in Java

hi all,
i have 2 time values
String time1="6:20";
String time2="21:30"
How to find the difference between 2 times in Java?
pls help
thanx in advance....

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How to calculate the difference between values in a custom PSObject?

If I have a PSObject (created from an imported CSV) that has data like the following:
date,Total size of files uploaded
03-17-2014 09:08,1293334574547
03-17-2014 09:10,1293335326912
03-17-2014 09:13,1293336523562
03-17-2014 09:14,1293337541156
03-17-2014 09:16,1321031223511
03-17-2014 09:16,1321032156844
This CSV will have lines added to it, so the total number of lines will vary.
Is there a way that two most recently added values and calculate the difference of the "Total size of files uploaded" values?
I have the columns properly cast as datetime and
int64 already using this:
$csv = Import-Csv $csvLocation |
Where-Object { ![string]::IsNullOrWhiteSpace($_.datetime) } |
Foreach-Object {
$_.datetime = $_.datetime -as [datetime]
$_."Total size of files uploaded" = $_."Total size of files uploaded" -as [int64]
$_ }
I tried searching thinking surely there must be someone else who has tried to do this" but I cannot find anything. I am just not sure how to approach this problem. Any help would be appreciated!

Assuming all of your records are sequential with the last two being the most recent you could use this:
$csv = Import-Csv $csvLocation |
Where-Object { ![string]::IsNullOrWhiteSpace($_.datetime) } | select -last 2
Foreach-Object {
$_.datetime = $_.datetime -as [datetime]
$_."Total size of files uploaded" = $_."Total size of files uploaded" -as [int64]
$_ }
$Difference = $csv[1]."Total size of files uploaded" - $csv[0]."Total size of files uploaded"
This uses the index of the imported array and just the last two records. Note that this will give a negative value if the total is less in the later record. Hope this helps!
You could also use
| sort datetime -ascending | select -last 2
if they aren't already in order...

Calculate the difference between two dates times in infopath form 2013

Hi,
I have an infopath 2013 form that contains three fields:
2 date time and the 3rd contains the difference between the two in hours
how I can make the difference between the two so that the display will be like this:
Date Time1 08/21/2014 22:00
Date Time2 08/22/2014 1:00
Diff Field 3:00

Hi,
Please refer to the following article which matches your requirement exactly.
Calculate the difference between two date picker controls in InfoPath using rules and formulas - no code!
Please mark it answered, if your problem resolved.

How do i make a form that will tell me the difference between 2 figures?

how do i make a form that will tell me the difference between 2 figures? ie: the jan. value of account is 32,010 and feb value is 34,013 and march value is 31,089 i would like it to tell me the difference automatically... whichever it is bigger or less... i am sure that this is possible... but i am a complete newby to all of this and could use some help...
jan = 34,013
feb = 34,013
march = 31,089
etc...
etc...

panahead wrote:
i guess what i am trying to make is a form that will automatically calculate the difference in my investment account each month... and sometimes it goes up and sometimes it goes down... but having the difference calculated for me (without the possibility of me making a mathematical mistake) and then also giving me the percentage would be what i am looking for....
Numbers will do the calculations, but it doesn't read minds.
The formulas shown in my previous post assume a table arranged like the example below:
The results in the bottom three rows (Apr, May and Jun) are correct for the simple formulas given and for the data entered in the Amount column as the empty cells are evaluated as containing zero. In practice, you would want a formula that suppressed the calculation until something was entered in that row of the Amount column. That's easy enough to add, should you think doing so will be useful.
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Function Module to find the Difference between two times.

Hi All,
Wud you plz let me know the Function Module to find the Difference between two times.
Input Time1( Hours:Minutes) Time2 ( Hours:Minutes)
Need Output in Hours:Minutes only . ( No seconds Needed )
Ex :
Input :
       06:00 to 18:00 Output : 12:00
and 20:00 to 06:00 Output: 10:00 with +ve sign only. No -ve sign.
Thanks,
N.L.Narayana

check this .
data : p_timel like sy-uzeit,
       p_timeh like sy-uzeit,
       diff like sy-uzeit,
       di(8) type c .
       p_timel = '200000'.
       p_timeh = '060000'.
       diff = p_timeh - p_timel.
       concatenate diff+0(2) ':' diff+2(2) into di.
       write:/ di.
also check for this.
       p_timel = '060000'.
       p_timeh = '180000'.
see if this can be implemented in ur code .
or else u can try with Fm L_TO_TIME_DIFF passing startdate enddate starttime endtime with UOM as MIN
hope this helps regards,
vijay

Function Module to get the difference between two times.

Hi All,
I want to know if there is any function module that gives me the difference between two specified times.
For Ex: Time 1: 12/01/2007 00:01 A.M
            Time 2: Time 1 - 180 Seconds. This changes the time, also may even change the Date. (As in above situation, the Time 2 will be 11/30/2007 11:58 P.M)
Could some one please suggest if there is any function module for this case.
Thanks in Advance.

Hi, You can use the following function module to calculate the diffrence between to dates in the unit that you want.
COPF_DETERMINE_DURATION calculates the difference between two dates and time in minutes and hours.
Parameters:
EXPORTING
     I_START_DATE "The start date of the time interval
     I_START_TIME "The start time of the time interval
     I_END_DATE   "The end date of the time interval
     I_END_TIME   "The end time of the time interval
     I_UNIT_OF_DURATION "Time unit of the duration if not to be calculated in days.
     Value     =====     Meaning
     ' '     =====     Day (default)
     D     =====     Days
     H     =====     Hours
     MIN     =====     Minutes
     MON     =====     Months
     S     =====     Seconds
     WK     =====     Weeks
     YR     =====     Years
     I_FACTORY_CALENDER     "A factory calender if not using the Gregorian calender
IMPORTING
     E_DURATION      "Time difference in unit specified.
Message was edited by:
        Rajesh Soman

How to Snap/Grab Image from 1394 camera and display the Image in CWIMAQVIEWER in VC++ ?

Hi,
I have : - IMAQ1394 2.0.1
              - NI Vision 7.1
In VB, I can Snap/Grab Image from 1394 camera and display the Image in CWIMAQVIEWER :
    Dim Image0 As New CWIMAQImage
    imaq1394SnapCW(sid0,Image0)
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Now,How can I do this in VC++6.0?
    I tried:
              C_CWIMAQImage m_imgViewer1;
              m_imgViewer1 = m_CWIMAQVision1.CreateCWIMAQImage();
              m_CWIMAQViewer1.Attach(m_imgViewer1);
              imaq1394SnapCW(Sid,m_imgViewer1); <--there is no "imaq1394SnapCW "function in VC++,why?
    Please help me!
    Thank you!

For people looking back at these old posts regarding
CWIMAQViewer - it was not made to be used in the C environments and is made
for VB.
Refer to the following locations for displaying images in C
environments:
Start»All Programs»National Instruments»Vision»Documentation
Start»All
Programs»National Instruments»Vision»Text Based Examples
Make
sure that you look at the examples and documentation that is in
reference to the C environments not the VB environments
Vince M
Applications Engineer

How to calculate the difference between intdate and getdate

Hi,
My requirement is to get the data for all the claims where the difference between transactiondate and getdate() should be less than or equal to 7 which means any claims that happened in the past week.
So, my query would be something like this
select * from claims
where transactiondate-getdate < 8
But my transactiondate is in int format such as 20150331 and getdate would be in the format of 2015-03-31. Can someone please help me on how can i achieve the difference between these 2 date formats in the where clause.
Please let me know if you have any questions or if i am unclear.
Thanks

Hi SqlDev12,
Please find the below condition in your query,hope it would help you
DATEDIFF(DD,CAST(CAST(TransactionDate
AS
VARCHAR)
AS
DATETIME),GETDATE())
< 8
Thanks & Regards,
Praveena.

How to calculate the difference between two dates?

Hello,
I would like to write some code which figures out how many days are between the Date_of_change (which is of datatype DATE, length 7 and of format DD-MON-YY) and the current date today. Then if the difference between Date_of_change and the current date is greater that 30 days for example then I would like to delete that record from the database.
Thanks
Doug

Something like this should work:
SQL> select * from emp order by hiredate ;
     EMPNO ENAME      JOB              MGR HIREDATE           SAL       COMM     DEPTNO
      7934 MILLER     CLERK           7782 21-OCT-2005       1300                    10
      7902 FORD       ANALYST         7566 22-OCT-2005       3000                    20
      7900 JAMES      CLERK           7698 23-OCT-2005        950                    30
      7876 ADAMS      CLERK           7788 24-OCT-2005       1100                    20
      7844 TURNER     SALESMAN        7698 25-OCT-2005       1500          0         30
      7839 KING       PRESIDENT            26-OCT-2005       5000                    10
      7788 SCOTT      ANALYST         7566 27-OCT-2005       3000                    20
      7782 CLARK      MANAGER         7839 28-OCT-2005       2450                    10
      7698 BLAKE      MANAGER         7839 29-OCT-2005       2850                    30
      7654 MARTIN     SALESMAN        7698 30-OCT-2005       1250       1400         30
      7566 JONES      MANAGER         7839 31-OCT-2005       2975                    20
      7521 WARD       SALESMAN        7698 01-NOV-2005       1250        500         30
      7499 ALLEN      SALESMAN        7698 02-NOV-2005       1600        300         30
      7369 SMITH      CLERK           7902 03-NOV-2005        800                    20
14 rows selected.
SQL> delete from emp where hiredate < sysdate - 30 ;
10 rows deleted.
SQL> select * from emp order by hiredate ;
     EMPNO ENAME      JOB              MGR HIREDATE           SAL       COMM     DEPTNO
      7566 JONES      MANAGER         7839 31-OCT-2005       2975                    20
      7521 WARD       SALESMAN        7698 01-NOV-2005       1250        500         30
      7499 ALLEN      SALESMAN        7698 02-NOV-2005       1600        300         30
      7369 SMITH      CLERK           7902 03-NOV-2005        800                    20
4 rows selected.
SQL>

How to read time stamps from a spreadsheet and calculate the difference between consecutive time stamps?

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