Has anyone "zoomed in" on a portion of a waveform graph?

Has anyone ever used two cursors to zoom in on a portion of a waveform graph?
I've seen that newer Oscilloscopes offer features to do this both horizontally and vertically.
See the attached jpg for an example of what I'm trying to do. It is from Google Finance. Notice the area circled in red. The two cursors define the portion of the waveform to be displayed on the main graph. There is also a scrollbar beneath them which allows the user to quickly move the zoomed-in area across the graph- I would love to have that functionality on the LabVIEW graphs.
My first thought is that I can do this using mostly property nodes. Not sure on vertical zooming scrolling the horizontal zoom- I'm thinking maybe this would best be done using scrollbars which are not part of the graph itself.
Any ideas or comments?
Thanks,
Dave
Attachments:
deleteme.jpg ‏38 KB

Cursor position is available in Labview via a property node. You can also set about every chart property with property nodes. I have used this many times. Here is a trick. If you have two cursors, Make separate arrays of the x and y positions. Then use the "Array max&min" to sort them. This will make your program independent of the cursor sequence.
Besides which, my opinion is that Express VIs Carthage must be destroyed deleted
(Sorry no Labview "brag list" so far)

Similar Messages

Save portion of a waveform chart

First of all I acquire 2 voltage signals and save them in a file.
The next thing I have to do is to read that file and show a portion of the waveform in a picture inside the page of a tab control, so each page of the tab control has a picture of a different portion of the waveform y different moments.
For example on the page 1, the portion of the waveform from 0 seconds to 2 seconds. The page 2 from 2 seconds to 4 seconds....
What I don´t know how to do is to save that portion of the waveform in a file so i can read it later as an image and put it on a tab control
Thank you.

Like this:
To get the Invoke node, right-click on the graph and select Create->Invoke Node->Get Image.
Message Edited by smercurio_fc on 04-23-2008 08:25 AM
Attachments:
Example_VI_BD4.png ‏2 KB

Has anyone experienced this problem: I am editing in FCP 7.0.3 on a Mac 10.6.8 - I have a clip in the browser that is full frame and matched the other clips but when I drop it in the time line it becomes a fully zoomed in version of itself

has anyone experienced this problem: I am editing in FCP 7.0.3 on a Mac 10.6.8 - I have a clip in the browser that is full frame and fine and it matches the other clips in my bins but when I drop it into the time line it becomes a fully zoomed in version of itself and I can only see a small portion of the image. What's going on? I've noticed this has happened in the past randomly with other clips and it's driving me cray cray! Any help appreciated greatly and thanks in advance for taking the time

In the FCP Browser, click on the source clip that is showing up sized incorrectly to select it. Once it is selected, type Command + 9 to see the item properties for the clip. Either report those properties here, or take a screen shot of the item properties and post the screen shot here.
Next, click anywhere in your sequence timeline and then type Command + 0 {zero} to see your sequence settings. Either report those settings or take a screen shot of the sequence settings and post that screen shot here.
MtD

Under the iCloud portion of settings on my iPhone, I have always gotten the message "account not verified". The email matches and is in fact the same for my accounts on iCloud and iTunes. Has anyone had this problem, and how have they resolved it?

Under the iCloud portion of settings on my iPhone, I have always gotten the message "account not verified". The email matches and is in fact the same for my accounts on iCloud and iTunes. Has anyone had this problem, and how have they resolved it?

Hello megalina23
You need to verify the email address associated with the Apple ID. Check out the article below on how to do this.
Associating and verifying email addresses with your Apple ID
http://support.apple.com/kb/HE68
Thanks for using Apple Support Communities.
Regards,
-Norm G.

Ok really now...has anyone figured out a new way to select a portion of a project and output just that part?? Or is it still a 20 step process??

Ok really now...has anyone figured out a new way to select a portion of a project and output just that part?? Or is it still a 20 step process?? What is the best/fastest way to give my client a teaser clip??

Still a 20 step process, many ways to approch it. Duplicate project and selectively delete everything around it. Or select and copy what you need. I think it could be a year before apple makes that step a 2 or 3 step process.

Has anyone successfully used the Zoom R16 with Audition?

I’ve tried just about everything, but can’t seem to get Audition to run with the Zoom R16. As noted in a recent post, I updated both the Zoom R16 firmware and widows driver, but that doesn’t seem to make the 2 work harmoniously.
Has anyone had success getting the 2 to work together? If so, what’s the trick?!
Thanks in advance
C

CharlestonPro wrote:
As noted in a recent post, I updated both the Zoom R16 firmware and widows driver, but that doesn’t seem to make the 2 work harmoniously.
I'm intrigued - what is actually disharmonious?

As i was using my itouch(2nd gen)there was a sudden and drastic increase in temperature on the rear portion(metal portion) and since then it is not working.Has anyone come across a similar problem?Any Suggestions?

As i was using my itouch(2nd gen)there was a sudden and drastic increase in temperature on the rear portion(metal portion) and since then it is not working.Has anyone come across a similar problem?Any Suggestions?

Sounds to me like the battery has failed.
You can take it to an Apple Store. They MAY be able to do something.. Or, you can find parts and "How-To" repair guides on the internet. eBay and Google are your friends...

Has anyone figured out how to scan from an HP officejet Pro 8600 after upgrading to OS 10.9.4

Has anyone figured out how to scan to a MacBook Pro with 10.9.4 from HP officejet Pro 8600?

iMovie acts as it does, I suspect, because it's so much safer (and easier) to program.
As iMovie is now structured, each clip has a startFrame and an endFrame. They show the starting point and ending point of that clip in its source file. There's only one of each. Simple.
For us to remove a portion of the middle without splitting the clip in two, iMovie would have to allow each clip to have multiple start/end points. So iMovie would have to "remember" that the clip starts playing at frame 100, stops at frame 120, starts again at frame 150, stops at frame 200, and so on. Very complicated.
The amount of data that would be required to undo a change, for example, could become quite large, and be very, very complicated. Lots of opportunity for errors. Imagine what iMovie would have to "remember" if we could remove the middle, added a title to the clip, remove part of the title, then split the clip and applied a slow motion effect to the second part of the split.
This way is simpler, and not all that inconvenient for users, in my opinion. I prefer simple when it adds to reliability.
Karl

Has anyone tried pre-compression to improve image quality?

I am having a hard time creating a usable disk image in iDVD from my 1 hr 45 min FCE movie. Portions of the video are extremely pixelated, usually the grainier, lo-light clips.
Since I don't have Compressor or DVD Studio Pro to use to get more control over the compression, I considered trying to "pre-compress" my video by exporting the entire master sequence using Quicktime conversion to an Mpeg4 format and playing with the data rate so that it would be well under the 4 GB limit of a DVD5. Then I was going to re-import the Mpeg4 into a new FCE sequence, add chapter markers and export again as Quicktime movie into iDVD.
My reasoning is that iDVD will no longer have to compress the file and the pixelization won't be there if it isn't there in the Mpeg4. Has anyone tried anything like this to overcome iDVD's compression and get more control?
If you think I should post over at iDVD forum please let me know.
Thanks in advance,
Mike

What you want to do does not make sense. You are going to ADD more compression
iDVD will compress your video no matter what you do ... it has to, in order to create the MPEG2 that comprises a DVD. iDVD will always do this ... even if you could create your own MPEG2 (which you can't do if you don't have Compressor) it would still try to do that compression ... it is a consumer app designed for ease of use
The more you "step on" your video before it goes to to iDVD the worse it will be.
You are right; you need more control over your MPEG2 compression and you can't tinker with iDVD's compression engine like you could with Compressor
The symptons you describe are not unusual. I fin that anything over 90 minutes in iDVD can give you potential probs. The quality of the original video had to be really, really high ... and doing a double compression ain't gonna help that.
Is it feasible to split the project in half and make two DVDs? If the project is under an hour, you can use iDVD's Best Performance preference which tends to give you a better result.
Remember, iDVD doesn't really care about the "size" of your project, only its length, so tinkering around to reduce the file size won't help you.
It is unfortunate that Compressor is not a standalone program and that DVD Studio Pro is now only included as part of the Final Cut Suite. I suppose you could troll e-Bay to see if there are any older, independent versions of the program still kicking around

Has anyone been able to get a repair/proper fix from Apple for their LCD?

The more I use my Macbook Pro while traveling the more i notice the 'sparkly/grainy' display. Compared to the White/Black Macbook it is obviously noticable what i'm talking about - especially on white backgrounds. My question is - has anyone been able to get a proper repair/fix for this common problem for the Core 2 Duo 15" Macbook Pro's?
I normally have my Macbook Pro connected to an external display but when i do take it along when I travel it stands out more and more every time.
Is Apple going to issue a 'recall/repair' for their customers who bought their Macbook Pro's? What am I to do here, When i need to use my laptop when I travel I can't take the annoyance of using this LCD screen.
C2D 2.16 2GB Mac OS X (10.4.8)

Yes, I can CLEARLY see it, it's like wearing glasses that are filthy. The laptop is one week old and I could see it from after the 802.11n upgrade. This is not all that zoomed, really. To me it looks like a video memory problem, not a LCD problem. The problem is the same if I connect an external DELL monitor. Also very visible there. Also very visible if I change resolutions or number of colours. The main reason I believe it's a video memory thing is that when I move a window, it changes from white to, well... yellow and red. Check out: http://niklas.saers.com/MBP/MG8665.jpg That is why I am unsure if this is the kind of grain you are talking about. Can you confirm that this is the kind of problem you guys are seeing?
PS, I use a Canon 20D with a 100mm f/2.8 macro lens.

HT4528 The icons on my iphone have all changed to large and I cannot change it back to normal view. Has anyone seen this happen?

My phone's display has changed as if it were stretched like we can do with photo's except it affects the whole phone. It won't go back to a normal display even after shutting it off and restarting. Has anyone seen this and how did you resolve?

Thank you...this did the trick. I had forgotten about that zoom feature. Now I will ALWAYS remeber it!
Thank you,
Deb

Has anyone chaged MT LION cursor back to arrow only?

Has anyone been able to get rid of the black box ssurrounding MT LionT's cursor? How???

Go to System Preferences -> Universal Access, click the More Options button, and uncheck the box that says "Show preview rectangle when zoomed out."

Has ANYone come across the problem i have? The screen expands?

Hey guys,
Has anyone come across this problem; the iphone screen now has enlargened slightly so that nothing is at the right resolution anymore!
Even at the home screen If i want to view the time, battery meter and the like, I have to tap up so the screen moves up. Having done this, the bottom bit becomes hidden (i.e. phone, mail, safari, ipod lines)!
What to do?

well i keep roaming around the support site n ended up just resetting all the settings..
I was reluctant to do so for fear of losing all data but that wasnt the case.
Seems to have fixed it.
Im thinking it was an application that may have tweeked the settings a little?
and no, the zoom wasnt on. :S
Thanks for the input tho peeps!

Accessibility, has anyone coded the option to change site colour?

Hi guys,
I have a client that needs their site to be coded with accessibility in mind, I have found a work around for changing the font size but has anyone coded the colour options like on this site http://www.guidedogs.org.uk/ ? Is there an accessibility plugin or anything that BC offers?
Thanks
David

Hi David, that is just all CSS and javascript.
The zoom thing on sites is an old concept and not needed though. Browsers zoom handle that these days.
Colour wise you just have different CSS files and styles and on change of a dropdown or tick with javascript you change the css file and if you want it saved you drop a cookie reference.
That is something as a webdesigner/developer/company is our job to implement, it is not something BC will offer.

Has anyone felt static shock through their earbuds when plugged into an airplane AC adapter using an Apple MacBook Pro with the aluminum shell?

I was flying home on an American Airlines 737. I was watching a movie and my battery started to get low so I plugged my AC adapter into the underseat adapters. This place had the standard 120 volt type plug not the 12 volt automobile type adapter. As soon as I did I felt somthing sharp or shocking on my ears. As it turns out when plugged I could feel static shock when any of the small metal portions of my earbud touched my ear and I could also feel static on the aluminum shell when I lightly rubbed my hand over it. The flight attendant could feel the same thing.
Has anyone else experieinced this?

Never. Just flew United 737 and was plugged in all the way. If that happened to me I would have disconnected from the power outlet. Probably a bad ground. Could you have tried the other outlet in the row?

Has anyone "zoomed in" on a portion of a waveform graph?

Similar Messages

Maybe you are looking for