Colourmap (indicator) in 3d parametric graph.

Hello,
How can I turn on colourmap (legend which describes values in terms of colour intensity) in 3d parametric graph? Is there any simply way to do this or I have to write additional vi?
I was looking everywhere and I coudn't find proper option to make the colourmap visible (indicator not control) in plot area.
Many thanks,
Peter.

Hello Peter,
I do not believe there is any way to enable a color map indicator on this graph. There are ways to display intensity in a seperate graph, however. Another customer has addressed a very similar issue at this link: http://forums.ni.com/ni/board/message?board.id=170&message.id=34884&requireLogin=False , and has provided a pretty good example. One of the bigger things to watch for is the conversion between the ActiveX color scheme and the LabVIEW color screen.
I hope this has been of help,
Travis M
Applications Engineer
National Instruments
Travis M
LabVIEW R&D
National Instruments

Similar Messages

Adding intensity to 3d parametric graph

I am trying to find a way to add intensity to a 3d parametric graph. I want to use the newest 3d parametrc graph in labview 8.6. So basically, i have my X, Y, and Z data, but i want to be able to change the color depending on values from a 4th input. The Plot Parametric sub vi has an input labled color matrix, but i cant find any information on what this does. Anyone know? I also though i could use the surface color map property node option, but not sure what format it is expecting and if this will work. Anyone have any suggestions?
much appreciated, thanks!!!

sufu wrote:
Can you post an example or more details. Basically, I have an antenna pattern plotted as a 3D surface and I want to create an "intensity" view where the magnitude is mapped to different colors.
- Sufu
"There is nothing new under the sun." Eclesiastes
See this thread starting at post # 7 I offered a series of posts that serve as a worse case tutorial.
All of the code is included.
Here are some previews.
Again these are just previews. See that thread for the example code and to read how it was done.
Ben
Ben Rayner
I am currently active on.. MainStream Preppers
Rayner's Ridge is under construction

Error -23027 in parametric graph

First off, I'm not even sure if what I have been attempting is feasible, so please tell me if it by chance is not possible to finish this. Nonetheless, here goes my attempt at solving my problem:
I am trying to display a parametric graph (form x(t)=... and y(t)=...). My front panel contains an XY Graph. My back panel is pictured below (and attached as a VI Snippet PNG file):
However, my functions are extremely complex (3 printed pages) parametric plot, (involving the Heaviside step, sign function, and lots of trig). When I first received the error ("-23027, more than one variable"), I thought I may have mistyped an element in the equation, but after extensive searching, I could not find a single letter out of place. This begs my question:
How can there be more than one variable if the only times I use letters in the strings that contain the formula are in "sqrt", "sin", "sign", "cos", and "step" (all functions, to my knowledge) and of course, the sole variable "t"?
Here is the basic idea of what I'm trying to pull off.
http://blog.wolframalpha.com/2013/05/17/making-formulas-for-everything-from-pi-to-the-pink-panther-t...
(my "picture" isn't as complex as most of the examples on wolfram alpha)
If any clarification is needed, I'm happy to post it. I just don't want to unnecessarily clutter this question with my 3 page parametric formula.
Thanks a million,
T16626
"Whether you think you can or can't, you're right."
~Henry Ford
Solved!
Go to Solution.
Attachments:
block-diagram.png ‏76 KB

Being somewhat new to LabView, I had no idea that "probing" existed. However, it is a great tool for debugging, (so far as I can tell), and although it didn't help me find the problem directly, it did help me eliminate some possibilities.
Here is what I did wrong in the VI snippet attached to the original question (which is still incorrect):
I left spaces instead of multiplying using the '*' (asterisk).
I wrote the sign function "sgn(..." instead of "sign(..."
Thanks for your help GerdW.
Also, I have attached my working VI Snippet to this post, while leaving the original up for people to use as an example of what NOT to do.
Cheers,
T16626
EDIT: I recommend changing the "number of points" value on the "Eval X-Y(t) Optimal Step" sub-VI to something much higher than the default 10, which produces a grapht that is a bit... inaccurate... if I may say so.
"Whether you think you can or can't, you're right."
~Henry Ford
Attachments:
block-diagram-working.png ‏75 KB

Obtaining equations with 3D graph

This is what I'm trying to do but I'm not too certain whether it's doable in Labivew or not.
Basically I have a program which collects bunch data points and insert them into arrays.
The 3 sets of arrays I have are:
Water Weight
Water Ratio
Reflectivities
Basically there are 1 WW and 1 WR array for each reflectivity. (ie. for 10% reflectivity there's a 1D WW array and a 1D WR array). So really the reflectivity array is just some constant numbers used for the sake of implementing the 3D graph.
I want to plot these arrays in a 3D graph. Right now I'm using 3D parametric graph instead of 3D surface graph b/c surface graph doesn't seem to work with the restriction of 2x 1D array and 1x 2D matrix. (Unless someone has a suggestion?)
I managed to plot the data points on the parametric graph. Basically if you plot the WW and WR in 2D you get a polynomial curve. So in 3D you get a surface of bunch polynomial curves.
Now what I want to do is able to select a specific reflectivity value on this 3D surface and get an equation for this particular polynomial curve at this reflectivity. Is this doable in Labivew at all? Helps would be much much appreciated. Thanx.

Wow thanx for the fast responses. I really appreciate it.
Ok let me explain the program a little bit. Basically "Read Grid" moves a computerized linear stage system so the program can collect data at different parts of the sample. The sample is placed on a plate which holds 8 different reflectivity backings (2%-99%) and an empty slot. The sample is wetted and dries up as time goes by. The program collects the sample weight and the measurement data, does some calculation to spit out WW and WR. Since there are 9 different reflectivities I have each WW and WR saved in arrays (so 18 arrays in total).
When the program is done one can analyze the data by clicking "Fit Data." Basically this sub-vi plots the 9 sets of data, does polynomial fits to each and finds the polynomial constants for each reflectivity.
Now it's necessary to be able to predict polynomial constants within the 2%-99% range (for example, say we want 13%). This is why I need to be able to plot a 3D surface/parametric graph, select the reflectivity value I want, and find out the polynomial constants for that specific reflectivity value. Basically you would have a surface that looks something like this:
http://www.leeds.ac.uk/iss/documentation/beg/beg28/beg2802.gif
So yeah the VI I attached previously doesn't have the right surface look.
Here's the screenshot for Read Grid.vi while it's running. Note, the data are kinda nonesense right now:
http://photobucket.com/albums/y218/Tawcan/?action=view&current=screenshot.jpg
Here's the screenshot for plotting 2D graph and finding polynomial constants:
http://photobucket.com/albums/y218/Tawcan/?action=view&current=screenshot1.jpg
I've attached a sample data text file so you would have an idea.
Attachments:
Avg Data.txt ‏3 KB

I give up! - waiting for items to copy

I know a lot has been said on the subject and I've said a few things myself. However, I've about reached my breaking point and would love it if someone could point me the way to someone at Apple to talk to.
I'm referring to syncing and the dreaded message generally at the end of the sync, "waiting for items to copy." Sometimes the message will end after a long time (an hour) and all will seemingly be ok, and sometimes it will continue indefinitely. I've tried virtually every suggestion here and from apple senior support. I have had the same problem for well over a year with 2 iPads and 2 iPhones. I've had syncing problems seemingly forever, back to 3 years ago when I had a MacBook Pro and after with my present computer, an iMac. However, the problem was not the same previously, i.e., waiting for items to sync., in the past year or so. It seems to be happening with more regularity now, like almost every time I want to completely change songs on my devices.
If I interrupt the "waiting for items to copy," I often get a huge amount of "other" indicated in the bar graph in iTunes showing the amount of audio, apps, etc.
I have a large library, almost 2TB and 80k songs. I don't know if that's the problem. I also have a 124gb iPad and 2 64gb iPhones. I rotate the songs every few weeks... I have about 15 playlists set up randomly so I can just switch playlists. As a result, I can rule out that corrupt songs are causing the problem unless there are a lot of corrupt songs.
Without exaggeration, I must have talked to 10 senior apple technicians. I'm covered by Apple Care on all but one of my 3 devices. It's always a very lengthy conversation and doing mostly the same things over and over with call backs necessary. And the problem doesn't get resolved.
The only way I can seem to resolve the issue is by doing a complete erase on the device and syncing my songs 1 playlist at a time. It's an incredibly lengthy process, especially when I try to sync normally at first and that fails - there went up to a few hours' time.
However, I'm not so sure about this method any longer. I sync'd my iPad yesterday, which took an entire day or about 15 hours. After completely erasing everything and restoring, I sync'd 1 playlist at a time as previously mentioned. I got the "waiting" message after each sync, but it eventually went away and all seemed fine. That is, until I checked my iPad. I should have had 22,000 songs (according to iTunes and a manual count of songs taking the totals from my playlists) but the iPad indicated only 12,000.
If it is not an inherent problem with every version of iTunes and/or every OS in the last few years, the only other thing I can think of is that's my computer. I am flinging my hands up in the air at this point and begging for a phone number of someone to talk to who can help. Most of the senior iTunes reps claim they are unaware of the problem, which is baffling to me.

(In response to Mike Stitzer's post):
I'm a 30-year+ PC user (DOS then Windows) with a systems programming and admin background in Unix. Apple is still a bit foreign to me, although not out of the realm of understanding. The problems Apple now faces deal with (1) its popularity, which now makes it susceptible to the same kind of hacking-attacks that Windows has endured forever (which has nothing to do with these problems, granted); (2) complexity of the technology and (3) inexperience and/or lack of knowledge plus limited training of its customer & tech support staff (both of these being the central issues of this syncing problem).
You make a good point: these companies are now using "us" as their beta-testers. They don't thoroughly vet their products before releasing them into the market, and then leave it up to the users to find problems/bugs, and maybe even figure out how to fix them. I don't know, honestly, but that's how it seems. Maybe they don't care. Maybe they know their client-base will remain steady and reliable because people still want to have iPads and iPhones and iPods. And like all tech companies, Apple is always moving on to the next best thing, the newest upgrade features which lure their client-base to buy again, and attract new buyers. Like any other company, their bottom line is what matters, and fixing problems, such as this sync one, may not be cost-effective enough to rise to the level of fixing, simply because it doesn't appear to be widespread enough, although who knows. I know people who have iphones who NEVER connect them to their laptops for syncing, who buy music from iTunes from their iPhone and that's their music library. That's the extent of their 'use.' There are a lot of Apple customers, maybe a majority of users, who have no clue about ninety-percent of what is discussed in these forums.
In any event, for some reason, after I updated to the latest iTunes, I was able to sync my three "i" devices, iPhone--which was what I was having the trouble with; then the iPad and just the other day, my iPod Classic; all synced without problem. Last Sunday I did, momentarily, have the "waiting to apply changes" stick while trying to sync some newly made ring tones to my iPhone, so I bailed out of the process, rebooted my (Windows 7) laptop, and tried again, and it took. Don't ask me why. I have no idea.
Regarding Windows... I have to say that since Microsoft's XP, I haven't had many problems with the system. I had seriously considered getting a Mac the next time I get a new laptop, and just going "all Apple" but I'm definitely reconsidering that now. With all the new products coming on the market now, I don't want to put all my cookies into one jar... you know? Things change, that's a guarantee.

Drawing several 3D lines in one graphic?

In principle my problem seems easy to solve. I know how to create the 3D graph,and how to set the number of plots available on the graph. My question is how do I specify "These data is plot1, these plot2..."? Cos all the data I put into the graph is represented in plot1.
Thanks in advance.

The following example draws 2 different plots on the same 3D graph (you have to specify the 'plot number' input to the '3D Parametric Graph' VI).
http://zone.ni.com/devzone/explprog.nsf/6c163603265406328625682a006ed37d/96d968d612f01e8586256a9d007614bf?OpenDocument
Chris_Mitchell
Product Development Engineer
Certified LabVIEW Architect

3D Not implemented at all.

How can I graph an x,y,z (vectors) all them in a surface 3d graph? I tried with 3Dsurface but only can put two vectors and one 2d map. It is not my goal a 2d map. I need to see a projection of a 3d curve, (like 3d curve) but in a surface 2d graph.Something operative like matlab but included in Labview.
I have a 3d positioning system that receives power magnitude signals and I have a x,y,z,power 2d array. I have split all information in 4 independent arrays. In each measurement sequence the system only scans a 2d plane and receive information of a power signal.
Now, I would like to plot, in colour spectrum or somethig that diferenciates de different levels of signal, the projection o this level in a 2d graph.
The most sim
ilar I've found is 3d curve, then I have moved axis orientation and I have fixed in a 2d plane. but I only can see lines. If I try to resize the size of point to a higer value the distance between point decreases, its a bad solution and I've not more resources to do it.
Please I carry loads of days trying to do this without success. Could someone help me?.
I'm not an english man, as you can see. So if you want more detailed comments about if exists some comprension error please make me know it.
Thanks.
Robert Clua

The following answer contains an example that shows how to draw 3D surfaces with different colors. Not sure if this is what you are looking for:
http://exchange.ni.com/servlet/ProcessRequest?RHIVEID=101&RPAGEID=135&HOID=5065000000080000008F250000&UCATEGORY_0=_49_%24_6_&UCATEGORY_S=0
The following webpages may also provide some insight:
http://digital.ni.com/public.nsf/3efedde4322fef19862567740067f3cc/e09eb9c864a320cd862568890005b388?OpenDocument
You can think of the x,y,z inputs to a 3D Parametric Graph as a 2D array of 3D vectors. For example, x(3,2), y(3,2), z(3,2) is equivalent to the 3D vector in space.
Chris_Mitchell
Product Development Engineer
Certified LabVIEW Architect

Help Creating an Antenna Pattern from Multiple Files

Hello, I would like some suggestions on how to create a 3-D plot from mulitple data files. In my setup I measure a receive antenna using an HP 8510. The transmitter is stationary but the receive antenna is able to be positioned at different angles. For each angle we sweep the receive antenna in the azimuth axis. So for each azimuth sweep I generate a data file, and each new sweep I roll the antenna in the phi direction. I would like some suggestions on how I would write an application where the user could select the multiple data files and then plot the data in a 3-D plot generating an antenna pattern or some call a volumetric plot.
Thanks,
joe

Hi Joe,
Attached are three vi's to get started with. AzElAntennaPattern generates a dipole antenna pattern (r = sin(theta)) in radius, elevation (theta), azimuth (phi) coordinates. It transforms the coordinates to Cartesian and puts every azimuth sweep into a new row in an array. This creates 3x 2D arrays, one for X, Y and Z, each row an azimuth sweep. These can then be plotted in a 3D parametric graph. Technically the parametric graph accepts spherical coordinates, but it won't draw axes or grids in spherical as far as I can tell. I'm sure it uses the normal spherical coordinates anyway, so best to transform to Cartesian yourself. DipoleWrite, generates azimuth sweep files and puts them into a folder you choose. Choose the folder by pressing the small folder icon before running it. AzElAntennaPatternFromFolder, shows how to read these files back in and plot them. If you post one of your files, I can help with a file reader.
Good luck!
Attachments:
AzElAntennaPattern.vi ‏167 KB
DipoleWrite.vi ‏15 KB
AzElAntennaPatternFromFolder.vi ‏180 KB

Plot of a 360 degree sampling around a line

I'm doing a scan around a line by sampling data 360 degrees for every value of z(z is the position on the line). So, that mean I have a double for-loop where I collect the data for each z-value. The problem comes when I try to plot the data. How should I do? I've tried the 3D-parametric graph with cylindrical coordinates, but it won't work properly.
The following structure is used for collecting the data.
For z = 0 to max_length
move delta_z
For theta = 0 to 360
move delta_theta
read (value)
End
End
Thanks!!

Jonas,
I was browsing through the Dev Zone and found this posting from you ( link ), I think is yours but I wanted to double check that you are receiving the notifications from it also.
Good luck!
Nestor Sanchez
Applications Engineer
National Instruments
Nestor
National Instruments

Stl files and labview

Ok here we go
Purpose: 3d micro/nanofabrication of collagen matrixes via multiphoton excitation.
What this means: A laser is driven by two mirrors attached to galvanometers and controlled by labview. When the laser passes over the collage (several times) it becomes crosslinked. The result is a potential micro scale cell scaffold that has potential in tissue engineering.
The goal: As of now we have limited capabilities for creating 3d structures. Lines rectangles and circles are easy enough but anything larger..or deeper requires the movement of an xyz stage which is also controlled by labview. The goal is to be able to be able to simply create an object in autocad (or a similar product) output the file to labview and run the galvanometers, which incidentally, move according to how much voltage is passed through them.
Ideas: Let's say we wanted to create a sphere. The laser only has one plane of focus so to create a 3d object requires slicing. Divide the sphere up into several hundred slices, which, when stacked loosely resemble a jagged sphere. Slicing can be done in a program called Magics RP. This is where the .stl file comes in. From magics rp we should be able to get an .stl file that describes the coordinates of these slices (in ascii or binary format) and from here transfer the job over to labview.
Problem: NO IDEA how to go about doing that last step. Does labview have anything built in to handle .stl files?? Any advice appreciated.

Hi Jimbo2,
The only mechanisms for creating 3D plots in LabVIEW are using the 3D Surface Graph, 3D Parametric Graph, and 3D Curve Graph. I don't know if these graphs will fit your application, you could probably better determine that than myself. Also, to my knowledge there is nothing inherent to LabVIEW to directly handle .stl files. However, you might be able to find a 3rd party program that will display .stl files. If the 3rd party package has an ActiveX control, you can embed it into the front panel of your VI using an ActiveX Container and call methods and properties to the control using the property nodes and invoke nodes in the ActiveX palette in LabVIEW.
I hope this gives you a couple of ideas,
Travis H.
LabVIEW R&D
National Instruments

Problem printing CWGraph3D

I am trying to print vi front panel containing CWGraph3D control but I only get pop-up error message
"An error occured. The control was unloaded". The vi crashes, print comes out with the container containing no graph only "Control could not be loaded" text.
Is that common to all ActiveX containers?
I use Print Panel to Printer method

No, this is not common. There may be a problem with the control. Can you print the panel with File>>Print?
Instead of dropping the activeX container and inserting the control, use 3D Parametric Graph from the Graph palette. Delete the 3D Parametric Surface.vi, that gets created on the block diagram when this object is used, and leave just the control reference. I tried this in LabVIEW 6.1 and didn't have problems printing.
Zvezdana S.

Lecture un fichier

Bonjour,
Je viens pour vous demander des conseils, j'ai un fichier texte de deux colonnes, j'ai commencé avec la lecture de fichier. Mon but est de récoupérer une valeur à partir une valeur entrer par l'utilisateur en sachant une valeur peut-être entre les deux valeurs par exemple 476,210 dans ce cas on prendra une valeur entre les deux. Merci d'avance pour les propositions.
Résolu !
Accéder à la solution.
Pièces jointes :
Fichier.txt ‏1 KB
Test- Read from Text File-yann-do.vi ‏20 KB

Bonjour ,
ci joint le vi correpondant a ce que vous souhaitez obtenir.
Vous pouvez utiliser la fonction ouvrir un fichier tableur qui vous renvera alors un tableau fonction du séparateur
dans votre cas ce n'est pas une tabulation mais trois espaces.
Je n'ai pas pu l'ouvrir directement en float directement , peut etre a cause de la representation en exposant donc dabord en chaine puis float.
Suppression des deux dernieres lignes puisque nulles
Pour la suite il reste a cherchez l'indice fractionnaire correpondant à votre x puis d'aller chercher la valeur d y avec cet indice (interpolation lineaire)
un graph xy permet d'avoir l'allure de la courbe
Cordialement
Tinnitus
CLAD / Labview 2011, Win Xp
Mission d'une semaine- à plusieurs mois laissez moi un MP...
RP et Midi-pyrénées .Km+++ si possibilité de télétravail
Kudos always accepted / Les petits clicks jaunes sont toujours appréciés
Don't forget to valid a good answer / pensez à valider une réponse correcte
Pièces jointes :
Test- Read from Text File-yann-do mod1 .vi ‏24 KB

Intensity plot LV 7

Hi everybody out there.
My licensed Version of LV is 7.1 for windows XP.
I have a big matrix:
first line: wavelenghth (380, 400, 420, ...)
first column: time (a nonlinear scale, e.g. 0,1,2,3,4,50,100,500,1000)
all the other "cells" contain my (relative) intensity signal:
0.01, 0.02, 0.00
0.03, NaN, -0.1
I cut the first row and column and generate an intensity plot.
That looks quite OK.
But what I want to do is the following:
1) How can I create ticks on the axis with my real value (and not the
matrix index)? (I'd like to use the vectors which is left from the
matrix cropping)
2) I need a interactive "tool" to read a cursor, which is placed by user
in this plot (with the intensity plot it is not possible).
=> in other word:
LV creates a nice plot with a axis including the ticks and the user can
put a cross (cursor) in the plot and LV returns the wavelength and the time
Is this possible?
I'm new here, I hope the questions are not off topic.
Thanks a lot,
Thilo Kunz

Intensity graps require the spacing in x and y to be uniform so labeling the axis ticks will not be trivial. Maybe you can substitute the axis of a hidden slide and set it to "text labels".
The cursor problem is much easier. Just read the cursor index and then index into your array of time values and display it. (Same for the Y axis, except you would need to use cursor position, because cursor index is not available here).
Another possibility would be a picture indicator to make your graph. Here you have full control over any axis labels you want to place. This will require some work, though.
LabVIEW Champion . Do more with less code and in less time .

Measuring frequency question

I have a Speedmaster device that outputs a TTL signal at a frequency
related to the measurement that it is reading. The frequency
fluctuates around 8000 Hz. I am trying to measure the period between
pulses in real time using a counter on a 6024E DAQ card but I am
getting readings that are not correct. I connect the +output of the
Speedmaster to the Counter0 Gate the GND output of the speedmaster to
the DGND of the DAQ. I am using the 20MHz timebase to count pulses on
Counter0. This is my first time trying to measure frequency this way
and any help would be appreciated.
Thanks,
-Mike

Hi Mike,
Gabi’s suggestions are definitely good ideas. If you are certain that your Speedmaster device is generating a TTL signal, you can check to see if your signals are connected properly using MAX.
1.
-Open Measurement and Automation Explorer.
-Right-click on the 6024E and select “Test Panels…” Test Panels are useful for trouble shooting because it removes any LabVIEW code from the test. You can use the digital I/O tab to see if you are switching the digital value. You can use the counter I/O tab to see how many pulses are counted.
-To configure the Counter I/O test, under Channel Name, select whichever counter you are using (zero or one).
-Change the Mode to “edge counting”.
-Select your signal channel as the “Edge Source”. The signal channel for your device (assuming you are using counter 0) should be PFI 8.
2.
There are several examples for acquiring frequencies in LabVIEW. These are accessible in LabVIEW by selecting Help>>Find Examples…
Then browse to Hardware Input and Output>> DAQmx >> Counter Measurements >> Digital Frequency. The appropriate example for your application would be “Meas Dig Frequency-Low Freq 1 Ctr.vi”.
3.
For simple acquisition tasks, it may be easier to generate your own program using the DAQ Assistant.
-Place a DAQ Assistant on the Block Diagram and choose Acquire Signals>>Counter Input>> Frequency.
-Select your device and counter.
-Configure your Signal Input Range. You mentioned that your input will be around 8000 Hz.
-Your Measurement Method should be “1 Counter (Low Frequency)”.
-For acquisition mode, you will probably want to use either “N samples” or “Continuous”.
-“Samples to Read” will be determined by how many pulses of which you want to measure the frequency. You may want to measure the frequency of a large number of pulses and average them to get one value.
-Click “OK”.
-On data output terminal of the DAQ Assistant Express VI, right-click and select Create>>Indicator to create a graph of the measured frequency.Message Edité par The Fearless Hyena le 04-30-2007 06:05 PM

I have a DAQ Assistant configured to read multiple channels at the same time. When I wire a graph indicator to the output, I see all of my signals jumbled together. How do I split them up into seperate signals?

I have a DAQ Assistant configured to read 2 channels at the same
time. When I wire a graph indicator to the output, I see the 2
signals jumbled together. How do I split them up into seperate signals?
When I wire any type of indicator it is showing just one output of a single channel.
I want 2 indicators showing 2 different signals as expected from the 2 channels configured. How to do this?
I have tried using split signal but it end up showing only 1 output from 1 signal in both the indicators.
thanks in advance.
Solved!
Go to Solution.

Yes you are right. I tried that but I did not get the result.
I just found the way. When we launch split signal, we should expand it (split signal icon) from above and not from below. It took me a while to figure out this.
thanks

Colourmap (indicator) in 3d parametric graph.

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