cubic spline fit

Similar Questions

• B Spline Fit Lockup

  Hello

  I've implemented the function B-Spline fit to find a curve of standardization. With specific sets of data, the program is suspended in the call from the library of NI_AALPro.lvlib:B - Spline Fit _nD .vi and ctrl alt del is the only way to escape. After you change the order of the polynomial fit or the number of control points he is still hindering on the data set.

  I'm under Labview 2009 with the complete development package, version 9.0f2.

  What is a user error? If not, does look like a bug in the routine curve? And nobody knows how to identify a problematic set of data before the interruption occurs?

  Attached is a sample of code with a data set that causes labview to lock up, so make sure that you have saved if you run!

  Thanks for the research!

  -Bill

  I looked more closely at your last 2 points of data and discovered that they have the same x value. By changing the last x don't value to the 6th decimal no hang up occur.

  Ben64

• Puzzled by changing the size of the array of Bell Curve (or made gaussien)

  I use an instrument which entered a table 1 d signal. When you draw the it, it looks a lot like a Gaussian function (it looks very good too).

  What I want to do is to change the size of the array of this input function (basically I want to increase the size of table).

  For example, when you look at the picture attached, you will see that the size of the curve in the picture on the left, which is the GROSS ENTRY, 70 =.

  What I want to do is to change this size to a number of interest (for example, let's say 80)...

  So basically I want to insert 10 new numbers in the table (in random places), but I want these 10 numbers to fit on the best-fit-the signal line (like you see in the image to the right).

  So I tried to use Gaussian worthy, and cubic spline worthy... etc but none of these features allow me to change the size of the table of the output to adapt.

  Any of them do not give you the equation of the line of best - fit either... so I can't solve Y for a known X.

  It is very important for me to continue my project.

  Thank you very much

  Look at the palette under Interpolation in the math palette.  You can find something that will work for you.  It will not add points on the equation, but should allow you to get more points along your curve.

  Lynn

• Data smooth XY of a closed curve

  Hello. I'm looking for suggestions on how to smooth the XY data that resembles the Attaché, a closed curve. The filter screw I looked all use X but not of X and Y.

  Thank you.

  Have you tried either:

  (a) using B-Spline Fit?, or

  (b) smoothing X and Y separately and recombine to give your smooth curve?

  You can duplicate your data in the adjustment so that you get a more continuous curve at the ends.  Here's a quick, rough example:

  

• Why my corrected image has non-uniform scaling (mm/pixel)?

  I use Vision tools of OR to calibrate nonlinear distortions by imaging a calibration of the spoaced points unfirmly image.  I have spread this information of calibration to calibrate a series of images taken under the same conditions as my calibration grid.  Then, I need to correct these images before I can make dimensional measurements. (Due to the nature of the processing routine measurement I need that these images corrected first).  I also need to enter the actual conversion to the images corrected to this measure of processing routine.  I get this by using the Pixel convert to real World.vi for each pixel in the image in order to see any variability within the image. I suppose this conversion value is consistent thoughout the picture but it isn't and ranges from 10%.

  Can anyone help explain what might happen?

  Secondly, in the correction of my images I only have the interpolation methods: zero order and bilinear.  Quadratic and cubic splines are grayed out.  Not sure why this is?

  Thank you

  Dan

  Another detail - calibration results NOR are valid within the calibration grid.  The numbers get anywhere outside the grid.  They get also a little wacky on the borders between the boxes.

  Loop through each pixel is a way to do it, but it is slow.  The only other possible approach I can think of is to map the image to a corrected image.  You can see distortions in this way, but you wouldn't have measurements for them.  I might consider to check every pixel on the other, given that the scale factors are not changing too quickly.

  Bruce

• function with a variable number of cubic curves

  Hello

  I have a set of data : a set representing the independent variable and a set representing the dependent variable. I need to find the minimum number of cubic curves (find their coefficients) that reduce the average quadratic error less than a given tolerance. If the tolerance is higher than 17 particular segments, so I need to raise an error.

  You have an idea what function blocks, I need to?

  I could use general polynomial Fit VI with order 3 and its default method to check the residue. If the residue is greater than the given tolerance, so I could try to use two cubic curves and test them on different starting and ending points until the residue is less than the given tolerance. If tolerance is not guaranteed, I add another curve and I test again the Assembly as shown above. By iteration until the residue is less than the given tolerance, or until I would need to add 18th cubic curve.

  If there was something ready, I would be grateful.

  Thank you.

  Fabiobonelli wrote:

  Please, you can test your VI adding another point to four present?

  X =-6453

  Y =-266

  Check the residue.

  Thank you.

  Did you even read my response? You have a serious air conditioning problem because the data is on a narrow Beach far from zero. By example-6500 ^ 3 is smaller that - 2E11, i.e. a value that many (many!) is orders of magnitude different from that of the constant term (1). The linear algebra problem that results is very ill, conditioned and just blindly Ford over the accelerator pedal are bad advice here.

  This isn't a problem with the implementation of LabVIEW, but a fundamental vice that you encouter also (or worse) If you would do your own math. No way around it. (See also)

  My recommendation is to delete the X offset and add it later again. Now things work correctly. (Note that a second order polynomial fitting still works without twist it).

  Try the and see for yourself.

• Interpolation spline work? (what is it supposed to do?)

  Hello!

  I was told (by a work colleague) [Xi] Spline_Interpolation must exactly match a Y 'paintings' (entry) if Xi was one of the 'paintings' X input values.  I don't know if it's okay - if that's the case, then the function does not work as expected.  Any idea is appreciated.

  Thanks in advance!

  Mathematically, the way that the work of interpolation spline is that it fits the curve so that the adjusted data pass through each point of experimental data.  This is in contrast to the linear or polynomial curve adjustments, which reduce to a minimum the overall error.

  One thing that you * could * be done wrong reverse x and are data.  Can not look at your code right now.

• The spline graph?

  Anyone know if it is possible to create a chart "spline" in JFX: http://www.fusioncharts.com/demos/gallery/#spline-and-spline-area
  
  Basically a graph in curves, but with curves between the data points for him give a fluidity?

  I think it's what Jasper recently blog on? http://fxexperience.com/2012/01/curve-fitting-and-styling-AreaChart/

• Watch OS 3 - current fitness activity closes - Bug?

  When you use the market activity (with an open goal) the session closes halfway through without my intervention.

  Today, I came home after a 5km walk to find that the session had stopped smoking. When I opened it the activity app, it showed summary screen activity completed with 0.19 km of distance.

  This is the 3rd time that to happen - it's a new feature or a bug?

  Thank you!

  Hello

  Make sure the wrist detection is open (on your iPhone, in the application of the watch, go to: My Watch (tab) > General > wrist detection.)

  Follow-up may be affected if your watch loses contact with your skin, leading them to believe that he had been removed from your wrist. A bunch of cowards can trigger this by allowing your watch raise your wrist or clothing (for example, the end of a handle) to fit under the back of the watch. Performance of the sensor can also be affected by temporary or permanent changes on your skin, such as certain wrist tattoos.

  Also check the back of your watch is clean and dry (use an abrasive, lint cloth).

  During the year, Apple Watch should be worn comfortably on top of your wrist. Apple suggests that you consider your clamping Strip before workouts and it loosen again thereafter. Better contact with your wrist can also improve the performance of sensor of heart rate during your workout.

  

  Workouts also can be suspended or ended early because of accidental interaction with the screen of the watch (including clothing). To avoid this, you can lock the screen during training (see article to drive app for instructions).

  More information:

  Use of the workout on your Apple Watch - Apple Support

  Your heart rate. What it means, and where on Apple Watch you will find. -Apple Support

• My iPhone case 6 will fit the iPhone 7?

  I recently bought an iPhone 6 cases and I was wondering if anyone knew if it fits the iPhone 7? Thank you!

  Hello

  The iPhone 6 cover Silicone case in leather and smart box are not compatible with iPhone 7.

  Apple offers separate lawsuits for iPhone 7:

  • Silicone cover:
    • http://www.Apple.com/shop/product/MMX02ZM/A/iPhone-7-silicone-case-Sea-Blue?fnod e = 99
  • Leather case:
    • http://www.Apple.com/shop/product/MMY32/iPhone-7-leather-case-Midnight-Blue?fnod e = 42
  • Smart battery case:
    • Ode http://www.Apple.com/Shop/Product/MN012LL/A/iPhone-7-Smart-Battery-Case-White?FN = 99

• Apple Watch: How can I get my heart rate to show the application of fitness?

  If I use the fitness app in shape and choose 'Other' for my workout, it shows my heart rate. But if I select 'Run in the open air' or "Walk in the open air" it does not show it. Is there a way to get my heart rate visible without having to leave the app to fitness and pull up on the application of the heart rate? It should be possible as the option 'Other' discount-shaped poster. I was hoping that the new update would automatically as in, but alas, it isn't. For those of us who want to run in a particular range of heart rate, it would be crucial. Fitbit wife t - it? Why not my dear remarkably Apple Watch?

  Help here > your heart rate. What it means, and where on Apple Watch you will find. -Apple Support

• Apple Watch Fitness?

  Hey guys! I thought that if I would like to pre-order the Apple Watch 2. But I just have 1 question. The ability of Apple Watch will always be on, followed everything I do? As he count me walking on the refrigerator and that count for the discount shaped daily "report"? and also me being at the Mall, do the basic everyday things, will it count fitness report and tell me how many calories I've lost that day? I really want to know this, because I want to start making goals so I can begin to be more active.

  So in summary, I just want to know if the ability of Apple Watch is always enabled, counting of the basic daily activities and tell me how many calories I've lost that day?

  Thank you.

  Hello

  The activity app works continuously in the background, tracking of activity including the measures taken and Active of Calories burned.

  It also monitors your progress toward your three daily goals: Move (Calories active), exercise and support.

  More information:

  Use the activity on your Apple Watch - Apple Support

• can any band 42mm Apple fit any 42mm Apple Watch?

  Can any band 42mm Apple fit any 42mm Apple Watch?

  Hello

  Yes it can - new and old similar bands.

• can assume that new tapes of series 2 will fit original Apple Watch?

  ??

  Hello

  Yes, they will do it.

  All existing (that is to say since when Apple Watch was launched) and new Apple Watch straps will fit any other Apple Watch of the same size of the case.

• Their is something stuck on my port of lightning and cable does not fit on my phone solutions please?

  The cable does not fit on my phone because it is stuck on the port of lightning

  6 iPhne

  Download the right cable before you damage your product and void the warranty.

  http://www.Apple.com/shop/iPhone/iPhone-accessories/power-cables