LabVIEW Idea Exchange

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Round towards Zero Primitive

We have a Round towards -Infinity (3.8 becomes 3, -3.8 becomes -4)

We have a Round towards +Infinity (3.2 becomes 4, -3.2 becomes 3)

We have a Round to Nearest (Rounds up or down to nearest integer, if 0.5, banker's rounding to even integer)

Why is there no Round towards Zero? Basically a truncate. (3.2 becomes 3, -3.2 becomes -3)

I have a use for that right now, but it takes several primitives to work.

As a corollary, a Round Away from Zero. (3.2 becomes 4, -3.2 becomes -4)

Message Edited by Ravens Fan on 01-19-2010 04:53 PM

It would be a great add-on if the graphs have got in-built measurement features/properties/methods like an oscilloscope;

Trigger
Basic arithmetic function like Ch1-Ch2, Ch1/Ch4, etc.
Event trigger based on plot value change. Example an event will be generated if Ch1 value is greater than a set value, an event will be generated if Ch2 value is greater than Ch4 value
In built average plots. Example add plots like 10SMA(Ch3), 30EMA(Ch1) etc.
Threshold based graph visual property change. Example configurable out-of-threshold or in-threshold plot color change.

Advantages;

Save time in development.
Integrated code will be efficient as no data unbuild/build/pass overheads.
Block diagram would be neat and easily readable.
Lightweight code.

Thank You

Adarsh

LabVIEW from 2006

CLA from 2014

I need a format into string that is capable to format numeric with thousands separators.

Like this (Visual Aides - Numeric Separators) idea but also for the conversion and scan functions.

Looking at the syntax

%[$][-][+][#][^][0][Width][.Precision || _SignificantDigits][{Unit}][<Embedded information>]Conversion Code

the <Embedded information> currently used only for time formats would be ideal to extend to a more general form.

Something like <+ nnn nnn.ddd ddd> would be nice 🙂 ( the d is already occupied ... # or whatever .... maybe similar to the excel format syntax or maybe there is a (better) standard??? )

Currently I use the attached vi to add the separators, however it would be nice to have it in a general form

I would like to have an XY Chart that has the same functionality as the Waveform Chart, but with x and y inputs instead of just the y. The XY Graph is not efficient to be used inside of a loop, mainly because it redraws the plots each iteration, and I've had a hard time trying to make a buffer that is as efficient as the waveform chart. The Waveform Chart does not allow you to define the x-axis as anything that is not an interval. For example, I might want to plot pressure vs. flow rate. Many customers also request the ability to change the sampling rate during an experiment. this would be much easier to handle with an XY Chart.

It would also be nice to have the buffer size included in a property node.

It would also be nice to have the ability to change the size of the graph palette.

It would also be nice to have the nearest plot coordinates (x and y values), or interpolated values, to mouse movements over the plot area as a "visible item" in the shortcut menu (this should show a dot over the plot's trace)... I've done this with an X Control, but I'd like the ability built into the new XY Chart on a lower level to improve effiecency.

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PlusAndMinus function

From an AE:

I confirmed with the Product Support Engineer for the PID Toolkit that the toolkit does not officially support the Mac OS X and therefore, we do not have an installer available for it. However, she also did mention that the PID Toolkit is created using LabVIEW code, so it is possible that you would be able to open VIs that come with the PID Toolkit in the Mac OS. I can submit a product suggestion for you to request Mac OS support for the PID Toolkit in the next release.

So here is the product suggestion. NI has gone to the trouble of building a cross platform set of VIs for PID and then stumbled in merely packaging it. Just build an installer.

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Python

It would be great if LabVIEW supported the Python language, including any of its various packages such as numpy. Such computations would be much more transparent and easier to support than calling code in DLLs. They would also be much more open and flexible than the existing built-in computational solutions in LabVIEW, e.g., expression/formula nodes. Currently, I have to call Python scripts via System Exec.vi, which complicates data exchange. (NOTE: I am using an older version of LabVIEW: 2009 SP1.)

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Allow booleans for array indexing

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3D Plot Should Not Plot NaN as Zero

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Hi,

for a complete validation of a software, it is mandatory to perform tests. When testing, we differ between two major tasks:

- static code analysis

- dynamic code analysis

For static code analysis, we got the VI Analyzer toolkit. It automates the task of looking into the sources (front panel and block diagram) and compare the current layout against recommended layout (style guide). Additionally, it detects known sources of issues for lack in performance or even crashes and misbehavior during runtime.

So it makes perfect sense, to define requirements that static code analysis has to be performed before proceeding to dynamic (runtime) code analysis.

Yet, VI Analyzer tasks have no option for creating such a link as a field "comment" or "description" is missing for the configuration!

I suggest to add such a field in the cfg-file level (exported VI Analyzer configuration) where we can add strings like [Covers: <req_ID>] as we are used to in LV code.

Norbert

In Place Auto Indexing

Hello LabVIEW Users,

While working with a complex configuration application, I found myself heavily utilizing in place operations. Throughout the process of contstructing the code, I found myself commonly having to create an In Place Indexing structure (pictured below). I thought it would be really nice if you could mark an auto-indexed array for in place operation. As always, I am open to suggestions, but thought this might be a nice creature feature:

Cheers, and happy coding.

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If you have open the Bookmark Manager and
you change one bookmark, the Manager gets an "Bookmark Info Change" event and reloads all bookmarks from all
VIs in the project. The event that triggers the update is the
application event "Bookmark Info Change". At this event there is no
info in which vis a bookmark has changed. If the event would provide the info which VIs have changed,
the Bookmark Manager would be able to reload only the bookmarks from this particular vis.
On larger projects the Bookmark Manager needs minutes (Time and CPU
load) to update the whole list. The additional event data node can be an array of vi names or references.

This changes will fixed also the EventQ Problem of the Bookmark Manager. If the Bookmark Manager is open and you change several Bookmarks the manager reloads all VIs for x times because everey change generates a "Bookmakrs Info Change" Event.

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LabVIEW Idea Exchange

In range and coerce should have additional polymorphic functionality like accept tolerance

Round towards Zero Primitive

Add "Akima Spline" option to the existing interpolation functions

In-built features in LabVIEW Graph

Include the constant "Tau", the circle constant

Format into string with thousands separator

Support new floating point formats in IEEE 754-2008

XY chart

PlusAndMinus function

shift register loop tunnel connection issue

PID Toolkit installer for all platforms....

Python

Saving all the event logs to file in event inspector window

Allow booleans for array indexing

TDMS function to delete channels and groups

3D Plot Should Not Plot NaN as Zero

Link VI Analyzer to NI Requirements Gateway

In Place Auto Indexing

Bookmark Manager: Add VI Source (List of VI-Refs or Names) to Application Event "Bookmark Info Change"

Search 1D array with all the indices of the matched elements