In range and coerce oddity

From the v. 8.6.1f1 help file
To change whether the function includes the value wired to upper limit or lower limit, right-click the function and select Include upper limit or Include lower limit from the shortcut menu to include or remove the value in the range. These options only affect the result of In Range?. The function always coerces x to the exact values of upper limit or lower limit, regardless of whether you select Include upper limit or Include lower limit from the shortcut menu.
Is there a reason for this? I was trying to coerce something and it took me a fair amount of time to realize what was happening and to look into the help file. Frankly, I'm kind of surprised I haven't run into this yet.
Tim Elsey
LabVIEW 2010, 2012
Certified LabVIEW Architect

If your array size is 10, you're telling the function to coerce between 0 and 10 which are actually 11 elements.
That's wrong. I understand what you're trying to do with the "do not include upper limit" but that's not what it is there for. It's there for only the "In range" portion of the "In range and coerce".
Just input a -1 before the in range and coerce function and you're all set.
The function works exactly as it says on the box. Adapt and survive.
Plus, you openly admit that your "solution" creates additional problems. This is far too small an issue to warrant revising how a quite frequently-used primitive should behave. If you want you can create your own sub-VI (inline it if you want) to do exactly what you're looking for. This, at least, won't break everyone else's software who uses this function properly.
Shane.
Say hello to my little friend.
RFC 2323 FHE-Compliant

Similar Messages

I have an array in which I want to check and see if it falls within a certain range with about 7 different ranges. I have tried the range and coerce function but something is going wrong.

Also, I have a timer that lets me know how long the trigger has been active. I want to know if it is possible if that time would be reset everytime the trigger goes off.
Attachments:
Code.vi ‏113 KB

1. Do not run using the Continuous Run button! This is intended only for certain types of trouble shooting and not for normal operation.
2. Put a while loop around your entire program. Add a stop button wired to the stop terminal of the loop.
3. Then you can replace all the feedback nodes with one shift register with the input expanded to five elements. Sum the three bottom ones for your averaging.
4. Nothing is wrong with the In Range and Coerce. You should only check it when you have data. That is what the Data Available output from Trigger and Gate is for.
5. I am not sure what you want to reset for your timer or exactly when, but it should be possible.
6. I did not try to figure it all out but you may not need the timer while loop once you wrap the loop suggested in 2 around the rest of the code. You may be able to move the shift registers to the outer loop.
Lynn

[Bug?] In Range and Coerce Comparison Mode

It seems that changing the Comparison Mode of the IR&C function with Arrays or Clusters attached does not trigger Type Propagation, or whatever is responsible for selecting the proper instance. For example, if I wire up three arrays to the inputs of IR&C, change comparison mode to Compare Aggregates, then create an Indicator from the In Range? output, the result is the wrong indicator and a broken wire. Likewise, I can change the mode on an IR&C function with a wired In Range? output and it will not break the wire until a later change triggers a recompile or type propagation.
LV10 (not SP1) and Win7.
Solved!
Go to Solution.

Hi Darin,
As mentioned, that CAR refers specifically to clusters and the 'In Range?' boolean output of the In Range and Coerce function. The specific VI that showed the issue always had an In Range output of true for all elements of the cluster except the first. However, it is worth note that the Coerced results showed correct behavior, unbundling showed correct behavior, changing the numeric representation of the compared elements (even changing back to the original representation of U32) corrected the behavior, this error is fixed in LabVIEW 2011, and when I recreated the VI from scratchn in LabVIEW 2010 it behaved as expected.
So, it is very unlikely that the error fixed in this CAR will impact your use of the In Range and Coerce function.
Matt
Product Owner - NI Community
National Instruments

In range and coerce

I want to make a VI that will show me how many random numbers from 0-100 range should be generated. After that VI should draw a histogram, showing how many percent of numbers were from 0-49 range and how many from 50-99. There should also be two numeric indicators showing how many numbers were from both of those ranges.
I use "In range and coerce", but for example if I generate numbers: 78, 97,74;
First "In range and coerce" (50-99)" will show output: 78, 97,74, which is correct.
But second "In range and coerce" (0-49)" will show output 49,49,49 which I dont want; I just want to show in this example one zero.
After that I will connect both input to histogram, will be OK ?
See picture, thanks
Rookie; LV 2011 on WIN 7
Solved!
Go to Solution.
Attachments:
project 3.vi Front Panel _2.jpg ‏68 KB

Yes I know that but I have probelms, that from 3 input numbers,"in range and coerce" function make:
78, 97,74 and 49,49,49;
From 3 input numbers I need 3 output not 6 :/. If it's not in range, why than show 49,49,49 ?
After that I will make front side as this on picture
Rookie; LV 2011 on WIN 7
Attachments:
project 3.vi Front Panel _2.jpg ‏68 KB

In range and coerce with complex numbers?

I have an array of complex numbers with these numbers I need to set to 0 all numbers whose real parts are negative. With "in range and coerce" I can split the array into real and imaginary then set all negative numbers to 0 then recombine the complex part but that still leaves me with 0+ai numbers that should be 0. How can I also set the complex part to zero for the negative numbers?

Hello,
You can use the following fonction in a for loop with your array.
Michel

In range and coerced problem

Good day,
I'm using labview 2009 and I have a problem using in range and coerced VI. The problem is that I want to map one analog value that goes from 0 to 12 to a scale of 0 to 20 and the VI in range and coerced but this VI is ignoring the numbers after the point. I already set the diferent values for the lower and higher limits but it keeps happening.
I posted my VI so you can see the trouble I'm having.
Best regards.
Esteban Gonzalez
P.D. The error is easy to see when the numeric indicator with the label "Current" have a value of 9.
Solved!
Go to Solution.
Attachments:
VI - Comparacion Corriente.vi ‏33 KB

First of all, you probably would need much less code, maybe the size of a postage stamp. (hint: threshold array)
You have overlapping conditions, for example between 11 and 11.1, two LED will be lit.
You have gaps where it fails right between two LEDs.
LabVIEW Champion . Do more with less code and in less time .

In range and coerce on time stamps

Is there any reason why I shouldn't be able to use in range and coerce on time stamps? In this VI the value is not being coerced, but the output for in-range is false. With values out of range, it DOES coerce the output.
Jim
LV 2013
Solved!
Go to Solution.

lmtis wrote:
What a NOOB mistake!
Thank you nathand
LOL The next noob minstake is forgetting to mark the person's post that solved the issue for you as the solution.
Bill
(Mid-Level minion.)
My support system ensures that I don't look totally incompetent.
Proud to say that I've progressed beyond knowing just enough to be dangerous. I now know enough to know that I have no clue about anything at all.

In range and coerce function does not always return a correct result

I passed 20E6 as DBL to "upper limit" input of "in-range and coerce" built-in VI, and also passed 20E6 as DBL to the X input of the VI, yet it says that it is not in range. (Note: lower limit was hardwired to 0.)
Apparently, there is some kind of roundoff error going on with LabVIEW.
I've seen this before when just wiring 2 doubles of the same value to an "=?" built-in VI.
When I display 30 digits or so, the values then display slightly differently.
How do 2 numbers which were entered by ME (not anything else) precisely as 20E6 manage, over time or by passing thru VIs, or by being copied & pasted -- or whatever -- to become "different"?

This simpliest 'In Range and coerce' does not work on my setup (8.0 and XP). The result should be 0 but it returns -5.
Attachments:
Coerce Not Working.vi ‏8 KB

In Range and Coerce, STRING

Hola a todo el mundo,
La funcion "In Range and Coerce" para cadenas de caracteres, tiene un comportamiento que no acabo de entender.
Si mi limite superior es z y mi limite inferior es a, si pongo d obtengo un PASS. Hasta aquí todo correcto.
¿Por qué obtengo también un PASS si pongo d seguido de cualquier texto? ¿Como es posible que solo evalue el primer digito?
Es decir: "alaglhzafgkhjzs" esta dentro de "a" y "z"?? ...... al parecer la respuesta es sí.
Con imagenes:
Muchas gracias por todo

Hola de nuevo,
He hecho un vi que realiza lo que esperaba encontrarme. Lo dejo en Labview 8.5 por si a alguien le ha sucedido lo mismo.
Gracias
Adjuntos:
In Range String.vi ‏14 KB

In range and coerce binary operation

How do I implment the "in range and coerce" function with binary operation? I want to do that to make my fpga code more efficient.
Kudos and Accepted as Solution are welcome!

What exactly do you mean by "binary operation"? I am assuming you are dealing with integers here to make life simple.
The In Range portion is just a simple Less Than and a More Than with an AND ( x < UL && x > LL). The Coerce portion would likely be best done with Select nodes based on the Less Than and the More Than comparisons.
There are only two ways to tell somebody thanks: Kudos and Marked Solutions
Unofficial Forum Rules and Guidelines

To coerce passed values, use the In Range and Coerce function.

-" Device Number for Card 1 uses data range coercion, which now only applies to data entry; values will not be coerced when passed to subVIs. To coerce passed values, use the In Range and Coerce function."
Hi,
I had program runnning fine in labview version 5.0, Recently i updated to labview version 6.0, but when i opened file i will see many warnings like above.
I saved the file as 6.0, all the warnings are gone and program compiles as well but i am not sure saving as 6.0 eliminate those problems like..."value will not be coereced when passed to subvis"

It means that some of your controls use coercion to alter data if it is not within a range. In LV 5.0 this worked for either typing the data into the control or passing it through the connector as a sub-vi. In 6.0 the data won't be coerced if it has been passed through the connector as a sub-vi, only if it is entered on the front panel. If your sub-vis relied on this coercion to operate properly then you will need to add the "In Range and Coerce" function to your block diagram to manipulate these values. If the coercion wasn't important then disregard the warning.
Hope this helps
Brian

Latch an "In Range and Coerce" Output until Reset

I have numerous voltages and signals that I am reading from an PXI system. Each of these signals needs to fall between a minimum and maximum.
Right now, the entire "program" is running inside of a While Loop. Each signal is being read and then passed to an "In Range and Coerce". This function is working well, in that it notifies me when the value falls outside of the maximum and minimum. But what I need to do is to "latch" the output from the "In Range and Coerce" until I have completed other functions also running in this While Loop.
I'm very new to LabView and a hardware engineer on top of that. I know that the way I'm doing this is probably not the best way. I am open to any suggestions.
Thanks,
-Steve

It sounds to me like the kind of "latching" you're looking for is automatically available to you as a side-effect of LabVIEW's "dataflow" nature.
Once a value exits an output terminal of the "In Range and Coerce" function, all wire paths connected to that output will receive the exact same value. I.e., once a value gets on a wire, it remains constant through all branchings connected to that wire. If you turn on debug highlighting mode, you'll see what this means more visually.
A common source of LabVIEW problems for people experienced in text languages is overuse of local and/or global variables. Perhaps this is the root of your issues with "latching?"
In text languages, data is contained within and "transported" by variables. In LabVIEW, data is contained within and transported by wires. In LabVIEW, variables and controls/indicators are just termination points to allow the data to be displayed or passed to/from calling functions. They aren't really important in and of themselves.
-Kevin P.

Upper Limit In Range and Coerce

I found a bug with the In Range and Coerce function, and I tried searching but I didn't see if anyone posted the issue before. Anyways, the Lower Limit is inclusive for the In Range indicator and the Upper Limit is not:
Using U32, set the Upper limit to 5 and lower limit to 1. When x = 1, In Range is True, and when x = 5 In Range is False.
Took a little bit of time to figure out why my code wasn't working... but just fyi if no one is aware.

That's kind of a unique situation... I was thinking more likely to see if an array index is valid. In my mind inclusive is intuitive, but I guess I wouldn't have found out about the setting if it was intuitive.

Problème avec la fonction " In range and Coerce"

Bonjour à tous;
J'ai un problème concernant la fonction " In range and Coerce". En faite j'utilise cette fonction pour avoire seulement une partie d'un tableau. Dans ce tableau il y a plusieurs fréquences et moi j'aimerai bien obtenir les fréquences comprises entre 10 MHz et 20 MHz seulement. Ce tableau est à 1D et sa taille est 200, je l'injecte à l'entrée de cette fonction en définissant également la limite basse (10MHz) et la limite haute(20MHz), à la sortie je récupère un autre tableau de 1D et de taille 200, lorsque je lis ce tableau je trouve les fréquences voulus mais avec plusieurs valeurs répétés de 10MHz 20MHz dont je n'ai pas besoin, en fait je m'attend à trouver un tableau de taille inférieure à celle du tableau d'entrée qui contient juste les valeurs comprises strictement entre 10 et 20 MHz. Je travaille avec labview 6i sous windows 95. J'aimerai bien que j'ai bien exposé ce problème.
Cordialement;

Bonjour,
Le probleme est que cette fonction arrondie les valeurs qui ne sont pas dans la gamme. Pour avoir un tableau de taille inferieure, il y a Array Subset, qui permet d'extraire une partie d'un tableau.
Il lui faut un point de depart et une longueur, donc en lisant l'index de la limite basse et l'index de la limite haute, une soustraction suffit. Je joins le vi au cas ou je n'ai pas ete tres clair.
Cordialement,
Simon D.
CLA | Certified LabVIEW Architect
CTA | Certified TestStand Architect
Pièces jointes :
subset.vi ‏9 KB

Dynamic Ranges and Dynamic SQL

Hi,
I have built a table of ranges and would like to use them in an sql query. Ive had a look but cannot think of a way to get this to work.
I have a table of fieldnames and a table of ranges. Does abap have a way of selecting a element from a table so I can generate the following sql.
select * from table
into some_table
where
    'FIELD0' IN range[0] AND
    'FIELD1' IN range[1] AND
    'FIELD2' IN range[2] AND
    'FIELD3' IN range[3] AND
I know how to build dynamic sql thats the easy bit. The hard bit is inserting a reference to a table element dynamically into the sql :S
Any help would be much appretiated,
Thanks,
James

hi,
Yes, We can make use of Subroutine pools.
This is from F1 help about dynamic where..
1. This variant is exclusively for use with SELECT. The
     internal table itab can only have one field which must be of
     type C and not be greater than 72 characters. itab must be
     specified in parentheses with no blanks between the
     parentheses and the table name. The condition specified in
     the internal table itab must have the same form as a
     condition in the ABAP/4 source code. The following
     restrictions apply:
- You can only use literals as values, not variables.
<b>     - The operator IN cannot be used in the form f1 IN itab1.    </b>
Regards,
Sailaja.

In range and coerce oddity

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