'Variance PtByPt.vi' generates values of negative values for some input
With certain sequences of input values the Gap PtByPt.vi can generate negative values. It is because of the precision in calculations.
Because it is very common to calculate the gap by taking the square root of the variance, this behavior can take you by surprise because the result will be Nan and not almost 0 you expect. According to the data, this may be frequent or very frequent. In general, a nuisance to debug.
The remedy is simple: take the Abs() before the square root value. A vi that demonstrates the case is attached.
I would suggest to include this correction (or similar) in the "Variance PtByPt.vi' because it gives rise to unexpected and hard to find errors.
By definition - variance cannot be negative.
CAR 446514 discussed in this thread has been corrected in LabVIEW 2014. For a more complete list of bugs fixed in LabVIEW 2014, see 2014 LabVIEW bugfixes. You can download a copy of LabVIEW 2014 evaluation at http://www.ni.com/trylabview/ or if you have a previous version of LabVIEW installed and an active subscription to SSP, you will be able to download the latest version of LabVIEW through NI Update Service.
Kind regards
Jeff Peacock
Product Support Engineer | LabVIEW R & D | National Instruments | Certified LabVIEW Architect
Tags: NI Software
Similar Questions
-
Generate values for automatic fields
Dear gurus,
I want to generate automatic value for each field in the form, as for example in the course of field OLM code or any field in any application how can I fill with automatic generated value each time as sequence concatenated with some characters?
Thank youVisit this link
http://apps2fusion.com/apps/14-FWK/195-OA-framework-R12-extension-exampleThank you
-
Definition of default values for the inputs of button and the cursor?
Hello
I use Labview 8.5.1 and have a few entries button and zipper-type on my front. How can I set some of them having specific (as opposed to zero) default values when the VI is executed?
Thanks for the help
The default value for the type of slide of entry (or button).
Right-click on the control.
Select "Operations on the data" > "default to the current value of doing."
-
I can't have my Subvi simply use the default values for some of its entries?
I use the code for a DS345 machine, using the sample code from here: http://sine.ni.com/apps/utf8/niid_web_display.download_page?p_id_guid=E3B19B3E9149659CE034080020E748...
I use version 7.0 (because I'm in 7.1).
Anyway. I managed to get the proper waveform I wanted, just stored waveform in the default values and frequency input, so I can some frequency I want input. When I run the example VI itself, it displays the waveform for the machine just that very well, however, when I use this example VI as a Subvi, it didn't come out of the machine data.
Any ideas?
Thank you
Edit:
When I say defaults for some of its entries, I mean the values that are usually connected by a user, controls that are not 'inputs' in VI.
I understood the question, and I must say that I am embarrassed. If you look at the code, I'm feeding a resource VISA name, when the Subvi needs just a chain with the GPIB address number.
-
NULL values for some elements of the XML reading tree
I am confirming that I interpret correctly all the elements of a custom data XML structure defined by my application (the schema is completely under my control). Some of the elements in my XML tree are read as NULL values, even if similar items are readind as expected. I have checked some obvious things like misspelling the names of keys, but have not yet find the problem. Anyone who has debugged similar questions - what else could cause this?
Example XML:
1.0.0.0 1000 MyAppsName 1000 userDefined StructName And extracted C++ w/comments at the end of each line about what I see (DataManager is my class of CRUD operations):
In DataManager.hpp:
QVariant mCustomDataStructsTopLevel; QVariantMap mCustomDataStructsTopLevelMap;
In DataManager.cpp:
mCustomDataStructsTopLevel = mXda.load(Utils::dataFilePath(customDataStructsFileName)); // XmlDataAccess; verified loading w/no errors mCustomDataStructsTopLevelMap = mCustomDataStructsTopLevel.toMap(); qDebug() << "appName element value: " << mCustomDataStructsTopLevelMap["appName"]; // Outputs "MyAppsName" as expected qDebug() << "lastId element value: " << mCustomDataStructsTopLevelMap["lastId"]; // Outputs null (specifically: QVariant(, ) ) - this is NOT expected qDebug() << "appVersion element value: " << mCustomDataStructsTopLevelMap["appVersion"]; // Outputs null (specifically: QVariant(QString, "") ) - this is NOT expected
OK, I got the feeling (and actually hoped) it was a silly mistake of face-palm on my part (compared to a problem of BB10 who had little chance of getting fixed).
The problem is that I copy the structure of custom data from Starter to my Active dir to my data directory to first install but do not crush him on subsequent launches, as the copy in the data directory is what the user changes and relies on. I was not a delete and reinstall on each of my iterations, so I wasn't really loading the modified versions of my XML I wanted--just, I was getting a day old stale version which was actually for the items I didn't expect NULL values for nulls. DOH!
-
How can I set the default value for an input text element?
Hello
I have a page where I ask the user to fill out entry texts.
The input text have links for some parameters of an exported method of the AM via the DataControl.
Once the user fills the text of entry, he can click a button that executes the method associated with AOS.
It's ok.
Now, I want to set default values appropriate (taken from a java method) for some texts of entry on the initial page rendering, for they are virgins.
How can I do this?
<af:inputText value="#{bindings.parameter.inputValue}" label="Method Parameter" required="#{bindings.parameter.hints.mandatory}" columns="#{bindings.parameter.hints.displayWidth}" maximumLength="#{bindings.parameter.hints.precision}" shortDesc="#{bindings.parameter.hints.tooltip}" id="it15"> <f:validator binding="#{bindings.parameter.validator}"/> </af:inputText> <executables> <variableIterator id="variables"> <variable Type="java.lang.String" Name="parameter" IsQueriable="false"/> </variableIterator> </executables>
-
The Null value as the default value for an input to a stored procedure parameter
Hello
How can we set the default values with the NULL value for the parameter in a stored procedure.
As described above if I want to delete only the functioningcreate or replace procedure emp_proc ( p_test_input in varchar2 p_emp_id in number, p_emp_name in varchar2, p_manager_id in number ) as begin if ( upper ( p_test_input ) = 'I' ) then insert into emp values ( p_emp_id ,p_emp_name ,p_Manager_id,sysdate ); elsif ( upper ( p_test_input ) = 'D' ) then delete from emp where emp_id = p_emp_id; else dbms_output.put_line ( 'Please input ''A'' for ADD or ''D'' Delete EMPLOYEE' ); end if; end;
I want to call this procedure without pass additional parameters.
Published by: Rede on May 28, 2010 12:21EXECUTE emp_proc('D',1010);
Published by: Rede on May 28, 2010 12:22create or replace procedure emp_proc ( p_test_input in varchar2, p_emp_id in number, p_emp_name in varchar2 default null, p_manager_id in number default null )
-
How to add the default value for the "Full - Text Search" box
Hi all
I am looking for the ability to add a default value for the "Full text search" box in the search form.
Example:
When the user accesses the search page it get default values for some fields (defined in the rule as default values) such as
xField1 = txt1 and xFiel2 = txt2.
and Furthermore we need full-text = Hello world.
Is this possible?
Another way that we use is to open the search by URL with coreContentOnly = 1 as a form:
http:// < Server >/cs/idcplg? IdcService = GET_DOC_PAGE & to Action = GetTemplatePage & to Page = STANDARD_QUERY_PAGE & coreContentOnly = 1 & to xField1 = txt1 & to xFiel2 = txt2
It is possible to add full-text criteria here? Somethig like: & text = Hello World
Thank you
Leon
It is not possible in a very obvious way, not to mention that it is a rather strange request. I can't really imagine a realistic use for this case.
Anyway, without a messy customization, you should provide a default query with an FTX inside element text setting (i.e. "IdcService = GET_DOC_PAGE & Action = GetTemplatePage & Page = STANDARD_QUERY_PAGE & QueryText =
Hello World " "")To do this in a profile in the secondary effects of the profile section, add the following:
<$dpPromote("QueryText",>$dpPromote("QueryText",>
Hello everyone ") $>. -
CS_SRS. WKTEXT generated value is being generated by commas instead points
I was able to add a coordinate system:
but the CS_SRS. WKTEXT generated value is being generated by commas instead points.
is generated as:
PROJCS ["" ETRS89 / Portugal TM06 ", GEOGCS ["ETRS89", REFERENCE ['European terrestrial reference (EPSG ID 6258) 1989 system', SPHEROID ["GRS 1980 (EPSG ID 7019)"6378137, 298,257222101]], PRIMEM ["Greenwich", 0.000000], UNIT ['decimal degrees', 0.01745329251994328]], PROJECTION [" ETRS89 PT-TM06 "], PARAMETER ['Latitude_Of_Origin', 39,6682583333333], ['Central_Meridian', - 8,13310833333333], PARAMETER ["Scale_Factor", 1], PARAMETER ["False_Easting", 0], ["False_Northing", 0], UNIT ["meter", 1]"]
but should be like:
PROJCS ["' ETRS89 / Portugal TM06", GEOGCS ["ETRS89", REFERENCE ["European terrestrial reference 1989 system (EPSG ID 6258)", SPHEROID ["GRS 1980 (EPSG ID 7019)" 6378137, 298.257222101]], PRIMEM ["Greenwich", 0.000000], UNIT ['decimal degrees', 0.01745329251994328]], PROJECTION ["ETRS89 PT-TM06"], PARAMETER ['Latitude_Of_Origin', 39.6682583333333], PARAMETER ['Central_Meridian',-8.13310833333333], ["Scale_Factor", 1], PARAMETER ["False_Easting", 0], ["False_Northing", 0], UNIT ["meter", 1] "]
and the SDO_CS. VALIDATE_WKT gives FALSE (170).
I could disable the trigger CS_SRS and update the value in the hand, but is it the right way?Hello Rui,
to disable triggers, according to me, is not a good solution. You must solve the problem for the insert statement. Please have look more closely at the NLS settings during your session when you do the insert. I had good experiences to set the NLS parameter to the American environment. You should be able to influence the outcome of integration by setting the nls_numeric_characters ',' (set NLS_NUMERIC_CHARACTERS = ','.) and make the Insert with this settings. The setting can be changed for the current session only, so it doesn' influence other processes in your instance. After insertion, you can reset the setting, or simply close the session.
Concerning
Udo -
How to generate values null?
Hello
I have a nice select which produces this output:
Sum of the value
42 02/1997
35.6 06/1997
17.6 07/1997
97,2 08/1997
42 10/1997
71.8 11/1997
90.6 12/1997
I want to see zero if for the month, that data is not provided, this would gives this result:
Sum of the value
0 01/1997
42 02/1997
0 03/1997
0 04/1997
0 05/1997
35.6 06/1997
17.6 07/1997
97,2 08/1997
0 09/1997
42 10/1997
71.8 11/1997
90.6 12/1997
He comes to select nice I use:
SELECT TO_CHAR (titi, "MM/YYYY") value.
Toto "stacking".
DE)
with precipitation as
(
Select date1 rainfalldate, value
of evv_stpl
where clef_var = 4542
and between date1
TO_DATE ("0101" |) ""1997"|" 000000', 'DDMMYYYYHH24MISS') and to_date ("0101" |) ""1997"|" 235959', 'DDMMYYYYHH24MISS') 365
order of date1
)
Select trunc (rainfalldate, 'MM') titi, toto (toto) sum of
(select rainfalldate, value, lead (value) over (partition by order of trunc (rainfalldate) of rainfalldate),
(Value) lead over (partition by order of trunc (rainfalldate) of rainfalldate) - value toto
precipitation
)
where toto > = 0
Trunc Group (rainfalldate, 'MM')
order by trunc (rainfalldate, 'MM')
)
Data:
Insert into 'evv_stpl' ('Clef_var', 'Date1', 'Value') values (4542,' 02/1997 ', 42);
Insert into 'evv_stpl' ('Clef_var', 'Date', value) values (4542,' 06/1997 ', 35, 6);
Insert into 'evv_stpl' ('Clef_var', 'Date', value) values (4542,' 07/1997 ', 17, 6);
Insert into 'evv_stpl' ('Clef_var', 'Date', value) values (4542,' 08/1997 ', 97, 2);
Insert into 'evv_stpl' ('Clef_var', 'Date', value) values (4542, 10/1997 ', 42);
Insert into 'evv_stpl' ('Clef_var', 'Date', value) values (4542, 11/1997 ', 71, 8);
Insert into 'evv_stpl' ('Clef_var', 'Date', value) values (4542, 12/1997 ' 90, 6);
Insert into 'evv_stpl' ('Clef_var', 'Date', value) values (4542,' 01/1998 ', 1, 8);
Could you help me? I know that I have to generate a list of months and a value of zero and to join these two tables. Despite my best efforts, I could not arrive at a result. Thank you very much for your help!
Christianfor some reason, you missed the join external on your last question, when he was on your old one (the {noformat} (+) {noformat}). If you want your activation date shaped in a particular way, you need the to_char on the external final selection. Always leave the stuff of formatting until as late as possible, in this way, you have lots of information in your calculations, etc.
This should be what you are looking for:
WITH RAINFALL AS (SELECT DATE1 RAINFALLDATE, VALEUR VALUE FROM EVV_STPL WHERE CLEF_VAR = 4542 AND DATE1 BETWEEN TO_DATE('0101'||'1997'||'000000', 'DDMMYYYYHH24MISS') AND TO_DATE('0101'||'1997'||'235959', 'DDMMYYYYHH24MISS') +365 ORDER BY DATE1), MONTHS AS (SELECT ADD_MONTHS(TO_DATE('01/1997', 'mm/yyyy'), LEVEL-1) DT FROM DUAL CONNECT BY LEVEL <= 12), MY_TAB AS (SELECT TRUNC(RAINFALLDATE, 'MM') VALUE, SUM(TOTO) CUMUL FROM (SELECT RAINFALLDATE, VALUE, LEAD(VALUE) OVER (PARTITION BY TRUNC(RAINFALLDATE) ORDER BY RAINFALLDATE) - VALUE TOTO FROM RAINFALL) WHERE TOTO >= 0 GROUP BY TRUNC(RAINFALLDATE, 'MM')) SELECT TO_CHAR(MONTHS.DT, 'MM/YYYY') VALUE, NVL(MT.CUMUL, 0) CUMUL FROM MY_TAB MT, MONTHS WHERE MONTHS.DT = MT.VALUE (+) ORDER BY MONTHS.DT;
Published by: Boneist on June 26, 2009 09:41
Oops; I forgot to add the to_char in!
-
Create a table of values for which a condition is met
I have exactly this problem, however connected solution is no longer valid: Re: table to automatically generate values if the condition is met,
Basically I have a table (named 'Master Sheet') that has two columns, one with project names with a status ('Active' or 'pending'). I want a separate table that automatically fills the project names of the leaf of the master for which the status is 'Active '.
For example, from this table:
Project
Status
Red
PENDING
Orange
ASSETS
Yellow
ASSETS
Green
ASSETS
Blue
PENDING
I want to automatically generate this table, which contains only values whose status is 'Active' (not 'pending' and without values null):
Project
Status
Orange
ASSETS
Yellow
ASSETS
Green
ASSETS
Please note that using the filter function does not work in this case, as I need to be able to freely add new lines to the two tables.
Hi Kath,
Here is a pair of similar solutions.
That on background uses a writing ('ACTIVE') of the value in the formula in the master-1 table to create the index in column C.
Above who gets the value of the cell in row 1 (A1) of the table of the single column and lists him only the names of any State were brought to the project.
Index columns can be hidden.
Formulas:
Master: C2 IF (B = C$ 1, ROW (), 999)
Table 1::A3: IF (SMALL (Master: $C, LINE () −2) = MAX (Master: $C),"", INDEX (Master: $A:$ B, SMALL (Maste r: $C, ROW (−2)), COLUMN ()))
Master - 1:C2: IF (B = "ACTIVE", ROW (), 999)
Table 1 - 1:A2: IF (SMALL ("Master-1': C, LINE (−1) ') = MAX ('Master-1': C),' ', index (" Master-1': b, SMA LL('Master-1'::C,ROW()−1),COLUMN()))) ")")
All forms filled up to the last line of their respective columns.
Filled with formulas in column A of the table of two columns to right of column B.
Single column table must be no more than a longer column of its master table.
Double table column must be as long as his master table or less.
Kind regards
Barry
-
How do subtract you different values for items in a specific table?
Hi LabVIEW community.
I am new to LabVIEW and Im working on my first application. One of my challenges I have problems is to know how to avoid specific values of some elements in a table.
My application is to measure the distance between sensor and magnet, however the initial distance for each magnet sensor is different. I have converted the tension up to a distance using the Math node for each element and now need to correct these values by subtracting their initial value.
The source is a table 1 d of DBL64 composed of 32 elements and each of these values must have a different value subtracted.
for example:
Element 1 - 5.557
element 2 - 2.34
3-7 654 element and so on
I tried to separate them (index table) and subtract the values of each item and then combine them again. This was not effetive. I need to write these values in a .txt file and also to use them in another calculation.
I have attached my attempted under VI.
Any advice would really be apprecieated.
You don't need to look it. There is a very simple method. Generate a table that contains all your desired offsets. Then he subtract off the coast.
This is the VI even with this change:
-
Take the minimum value for table data
I'm storing test data in a table, with the hope that I can output the minimum value of the data. So far, I have used the table of max/min but can't make it work how I want. The test runs continuously in a loop of the holder. I get the minimum values in the table, but I would like to change the number of samples that the table contains, before it generates a minimum. The other option is that I run the test for a period of time (e.g. 3 seconds) and the table stores the data for this time then output 1 minimum value for the entire period.
My current configuration VI is attached.
Very appreciated
Chris
The size of the array in your VI is determined by the number of samples that you collect in your DAQ assistant, who is now 100 samples. Never more, never less.
How many samples do you want before you determine the minimum?
Maybe what you really want to do is to build the table in the while loop and store it in a shift register, and when the loop has repeated enough times, then you take the minimum of built table.
-
Hello
The Sub data, I want to find records where status = 1 and the values for all the questionnarie ($quest1 to Quest5) is other than 1, i.e. the value must be null, 0 or a negative integer
Thanks in advance
with t as
(
Select 101 as the nest, 1 as the status, "Cookie" as a term, 1 as $quest1, Quest2 0, 0 Quest3, 0 Quest4, 0 as Quest5 from dual union
Select 102, 1, "Chips", 0, 0, 0, 0, 0 double Union
Select 102, 1, "Chips", 0, 0, 0, 0, 1 double Union
Select 102, 1, 'milk', 0, 0, 0, 0, null Union double
Select 103, 0, 'mixture', 0, 0, 0, 0, 0 double Union
Select 103, 1, 'sugar', 0, 0, 1, 1, 1 Union double
Select 104, 1, 'sugar', null, null, 0, 0, 0 double Union
Select 105, 1, 'the', 1, 1, 0, 0, -1 Union double
Select 106, 0, 'milk', 1, 1, 0, 0, -1 double Union
Select 106, 1, 'milk', -1, -1, 0, 0, -1 Union double
Select 106, 1, 'milk', 0, 0, 0, 0, 0 of the double
)
Select * from t
When status = 1
Output
NEST STATUS TERM $QUEST1 QUEST2 QUEST3 QUEST4 QUEST5 102 1 Chips 0 0 0 0 0 102 1 Milk 0 0 0 0 104 1 sugar 0 0 0 106 1 Milk -1 -1 0 0 -1 106 1 Milk 0 0 0 0 0 Select *.
t
When status = 1
and nvl ($quest1, 0)<= 0="">=>
and nvl (quest2, 0)<=>=>
and nvl (quest3, 0)<=>=>
and nvl (quest4, 0)<=>=>
and nvl (quest5, 0)<=>=>
-
Default value for the text in a tabular presentation element
Hello
I creates a tabular form generated by using a SQL query.
I would like to first of all the value for a column of nextval deault a sequence when an empty row is added using the add a LINE button
my request currently for the sequence value column when you click on the ADD row button is:
apex_item.display_and_save (4, NULL) as trans_id,.
I want this column trans_id trans_seq.nextval where trans_seq is a default sequence.
I tried specifying the default value in the column attributes (expression of PL/SQL - trans_seq.nextval) which does not work.
If I give in the SQL query, it throws an error saying that the unauthorized sequence here...
My query is structured as follows:
Appreciate any help in this regard. I hope that my question is explained clearlySELECT apex_item.display_and_save (4,c002) trans_id FROM apex_collections WHERE collection_name = 'TRANSACTIONS' UNION ALL SELECT apex_item.display_and_save (4,NULL) as trans_id FROM DUAL WHERE :request = 'ADD_ROW_MANUAL'
Thanks in advance,
Dippy
Published by: Fisher on February 16, 2010 12:41
Published by: Fisher on February 16, 2010 15:55Hello.
1. create a function named next_value
create or replace function next_value return number is ret_value number; begin select trans_seq.nextval into ret_value from dual; return ret_value; end;
2 display the query as below
SELECT apex_item.display_and_save (4,c002) trans_id FROM apex_collections WHERE collection_name = 'TRANSACTIONS' UNION ALL SELECT apex_item.display_and_save (4,next_value()) as trans_id FROM DUAL WHERE :request = 'ADD_ROW_MANUAL'
Kind regards
Shijesh
Maybe you are looking for
-
Unlock security on Officejet Pro 8610
I created my new 3-in-1 with no problems until I decided to add the security - now I can't unlock the settings. Help, please
-
Equium A60-156 P4 532 "urgent helo"
Hello world I'm at my wits end, some please explain how to get into the bios of my laptop. I contacted support on the phone and they me disconnected twice. Thank you very much AngelHeart
-
Question about the warranty contract number
I've been recording my toshiba L10 and the basic warranty, but I have not received agree security number to save extention of warranty.What should I do to receive the warranty contract number?
-
K4T90AV: How do I completely remove McAfee?
My computer came preloaded with McAfee protection. I want to hae Windows Defender as my security and the firewall that comes with Windows 8.1. How to completely uninstall McAfee so that I can activate the Windows Defender? I tried to ask the respo
-
Forms &; reports 12 c configuration
Salvation;I am trying to install the forms & reports 12 c and follow this linkEverything was as expected, but I have not understand a part in 2.4.8.1 'putting into service a machine', article 4.I started WLS_REPORTS server, but do not understand how