Polynomial to scatter

Similar Questions

• Polynomial function

  First of all, thanks to you in advance for reading my question and taking the time to respond. I greatly appreciate your effort.

  I have 30 lines of data. Each line represents the net amount of items sold every day.

  I created a graph 2D with these data and applied the polynomial regression for purposes of sales forecast. You can find this feature under series->-> polynomial trendlines.

  You also have the following options to order: 2, 3, 4, 5 and 6 (I chose 6). That really means this 'order'?

  Very simplified and general answer (from a non-statisticien):

  Trend curves are the "best fit" lines applied to a set of XY data that has been drawn on a diagram of dispersion. A linear trendline can be described using a polynomial function "order 1':

  y = a * x ^1 + b * x ^ 0

  (x ^ 1 = x, x ^ 0 = 1)

  Best suited for data graphics in a shape that looks like a curve will require a graphic that function as a curve, as a quadratic function (order 2):

  y = a * x ^2 + b * x ^ 1 + c * x ^ 0

  Data sites that seem to have a folding alternated in the curve, you need a higher order, such as a cubic function (order 3)

  y = a * x ^3 + b * x ^ 2 + c * x ^ 1 + d * x ^ 0

  Unless your data set is large enough, higher orders probably will not give you a more precise match.

  For more information, search for "polynomial regression function" and check out some of the statistics pages.

  Kind regards

  Barry

• Scatter Chart with over 24 hours: confusing result

  I have two columns of data. TIME is formatted as a date/time value with "Date: None, time: 19:07.» AVERAGE is formatted as a number. TIME contains values between 0:00 to 23:59. TIME is on the x-axis of my scatter graph, and the AVERAGE is on the y-axis.

  When I create the graph XY scatter with these columns, the y-axis are mapping correctly, but axis x are not. Values of x-axis does not range from 0:00 to 23:59, but leave 08:05 on the left at 0:15 on the right. The values 0 and 08:05:15 not yet listed in my Chronicle of the TIME.

  I suspect the formatting of date and time is the problem, but what is the solution (or work around)?

  Thank you

  view a sample of your table here for us to try would be helpful AND post a screenshot of what you have would also help you

• First - Division of polynomial

  Quick questions, hoping someone can explain.

  I want to do first HP (2 x ^ 2 + x + 6) /(x+1)

  When I enter quot(2x^2+x+6,x+1) I get 2 x-1, but he neglects to tell me about the rest of (7 / x + 1) is this nbehaviour expected? How can I get a complete result?

  Thanks in advance

  Paul

  Hi, Paul!

  Functions of the polynomial division:

  quot - quotient only.

  REM - rest only.

  quorem - the quotient and the remainder.

  Hope that helps!

• How to calculate the equation of dataset using 'Fitting VI' (non-linear or polynomial fit)?

  I have the datasheet of a NTC (thermistor negative Coefficient) and I want to calculate the most approximate equation

  that describes its behavior. The table has values of temperature and resistance. If the resistance of the NTC varies according to the temperature it detects. I tried the following:

  -Excel: polynomial adjustment

  -Maple: polynomial adjustment

  -LabVIEW: Polynomial Fit.vi

  I've been doing equations with a not very good approximate parameteres. I suspect that this method 'Polynomial FIT' it is not the best method for this type of data/equation (being a non-linear equation).

  So is - that someone has used the non-linear Fit.vi matching the behavior of a dataset object? If so, can you explain how this VI... I would really appreciate it.

  Thanks in advance and I will wait for your reply.

  
  

• assessment polynomial vi giving inconsistent results

  I'm looking at an easier method to evaluate polynomial, rather than using formulas nodes that I currently use.  I found the "polynomial evaluation vi' who would think based on aid would be able to calculate the result of a polynomial Exhibitor multi.

  Currently, I would do something like the following in a node of the formula:

  float64 D1 = 0.387481063640E - 01;
  float64 D2 = 0.332922278800E - 04;
  float64 D3 = 0.206182434040E - 06;
  float64 D4 = - 0.218822568460E - 08.
  float64 D5 = 0.109968809280E - 10;
  float64 D6 = - 0.308157587720E - 13;
  float64 D7 = 0.454791352900E - 16;
  float64 D8 = - 0.275129016730E - 19;

  DC = (V * D1) +(D2*V**2) +(D3*V**3) +(D4*V**4) +(D5*V**5) +(D6*V**6) +(D7*V**7) +(D8*V**8).

  I tried the same calculation by writing a little VI which used the polymomial assessment vi and get seriously incorrect results.  (my vi attached).

  Research in the evaluation of the polynomial vi, honestly, I don't know how it is supposed to work, unless he's trying to do something completely different that I do.   (With the help of labview 2015)

  I'm open to suggestions here.  Thank you!  Mitch

  The first table is the constant term (V ^ 0 = 1), if you need to add an element that is equal to zero in the table of coefficients.

  The polynomial is defined as:

  DC = D0 + (V * D1) +(D2*V**2) +(D3*V**3) +(D4*V**4) +(D5*V**5) +(D6*V**6) +(D7*V**7) +(D8*V**8)

  In your case, D0 = 0, but there still need to be there.

  

  ... and are not the constant diagram EXT. As you can see about to constraint, it will be converted in any case to DBL.

• Feature Request: order more polynomial scaling

  VeriStand supports up to 9, and the producers that I am simulating are settled with polynomials of order 10. I'm getting 9 on the curve the 10 makes it and get on with it, but it would be nice if it wasn't an arbitrary limit.

  Hey Stephen,

  This definitely falls into the territory of feature request, but it seems that the scale supports an arbitrary number of coefficients.  It's just the system explore UI that limit us.

  To test this, I went directly in the XML definition of system and a factor of 11 has added to the scale of the polynomial:

  

  And it seems to work to generate the reverse and actually coefficients across the channels.

  Note: in general, it is never recommended to amend the definition of XML system directly.  You could cause unforeseen problems and generally make your life difficult.  Using the ZFS API to create a polynomial scale would be the recommended method to work around this limitation of the user interface.

  -Kyle

• Polynomial

  Hello!

  Using the line profile, I got a curve representative the trend of pixel on an image, now I want to apply for this curve a polynomial for a more linear trend eliminating bothers them; but before that I have to select(interpolate?) some points on this curve (this point will be the entrance to my polynomial). How can I do this?

  Yet once, your displayed such VI contains no data.

  You can use 'polynomial adjustment' to obtain the coefficients and then use "polynomial evaluation" to calculate the function for an arbitrary x ramp.

• Polynomial evaluation in FPGA

  Hi all
  I am currently facing a problem. I want to evaluate a 6 order polynom in the FPGA (in fact this function will be part of a larger VI). Here's what I put in place:
  Coef tab contains 7 following coefficients (from the RT):

  2734.91

  53.4378

  -2.02666

  0.0463295

  -0.000588338

  3.71736e - 06

  -9.06681e - 09

  When I sent this VI in the 2013 worker compile, I get the following error:

  LabVIEW FPGA: Compilation failed due to the overmapping of the resource.

  The FPGA VI does not fit on the FPGA target because the VI requires more resources
  that are available.

  Suggestions to eliminate the problem:
  Reduce the amount of logic in the VI
  Reduce the number of multiplications, FIFO, or the amount of memory on the block diagram
  Reduce the number of objects on the front panel
  Change the settings of the arbitration
  * Use Timed loops instead of other loops
  * Use Timed loops for intensive resources sections of the block diagram that
  do not require a loop

  I don't know how to solve this problem... Any idea?

  Thank you very much!
  Tom

  What happens if you did it in a loop For?  Two registers, one to accumulate the multiplications of the value of X, the other to accumulate the polynomial to offset additions.

• VS2012 problem of configuration and deployment with scatter chart

  I've recently updated one of my programs of VS2008 to VS2012.  I also had Measurement Studio 2009 and upgraded to 2013.  Since Microsoft dropped its installation and deployment in VS2012, I'm looking to use Flexera Express to create an installer.  My app contains a form that contains a scatterplot graph control that must be deployed on both Win7 and XP computers.  I tried to force the compilation to .NET framework 4.5, but that only supports XP.  I demoted the .NET framework down to 3.5.  I noticed that I had to change the references OR whenever I changed the .NET framework.  I only had references to the NationalInstruments.UI, NationalInstruments.UI.WindowsForms and NationalInstruments.Common.  When I build the installation it requires me to explicitly declare the redistributable packages.  So I chose the package OR Measurement Studio Windows Forms Support and automatically selects the load at the time of Design and common User Interface Support (dependencies I guess).  But after I create this version of installation and install it on a system, I get the following message when you attempt to initialize the scatter chart control:

  Could not load file or assembly 'NationalInstruments.UI, Version 8.9.35.246, culture = neutral, PublicKeyToken = 18cbae0f9955702a' or one of its dependencies.  The system cannot find the specified file.

  Y at - it a redistributable package I'm missing?  I tried to add the base components for the execution of Measurement Studio, but get the same error.

  I tried to use Wix, but ran out of patience, trying to figure out this one.  Any help is greatly appreciated.

  In general, when controls utilities deploying Measurement Studio you refer to this documentation for the required dependencies for the merge modules:

  http://digital.NI.com/public.nsf/allkb/6677098983C36F9086256CFE007F457A?OpenDocument

• Primitive polynomial (generate some Bits VI)

  In the attached VI, I'm actually generate bits using the PN sequence and primitive polynomial. I'm having a problem in the primitive polynomial. If I have a primitive polynomial (x ^ 4 + x + 1) can any body guide me how to make it work? I tried different ways but error message.

  Thank you

  JK

  I fixed it my self.

  Thank you

• CRC-16 with 0 x 8005 polynomial

  I use a CRC-16 for a community page VI of NOR who uses 0xA001, which is the inverse of the polynomial, I want to use, 0 x 8005. For example, with a single 0xD6 byte data, the CRC-16 with 0xA001 is 0xDE3E, it should be 0x9E81 using polynomial 0 x 8005. Change just the polynomial does not give the right result. I have an attached image. Is there something I should 'flip', or 'reverse' to be able to use the polynomial I want and get the right answer?

  

  
  

• Multiplying by output of small polynomial coefficients on vi trendline and get unexpected results

  I'd appreciate it if someone could shine any light on this problem for me.

  I'm performing a polynomial regression with the VI express Curve Fitting.  The express VI itself works very well.  I used the polynomials it generates for the graph of a function in Excel and it looks perfect.

  When I convert the signal to an array and then multiply by other values things start to go south.

  The results of multiplications are wrong when some 'x' values are used.  The strange thing for me, is that it does not work for all values of x.

  Not sure if this is useful, but the expected values for x 0 through x 5 (bottom right, below) are:

  x 0:-1,14

  x 1: 16.11

  x 2:6-3-19

  x 3:-3.39E - 4

  x 4: 6.76E - 7

  X 5:-2.08e - 7

  and the values displayed when the routine is running:

  x 0:-1,14

  x 1: 16.11

  x 2: 25.57

  x 3:-925.06

  x 4: 104.25

  x 5:-2017.87

  Any ideas?  I think a data type must be changed since the expected values are very small and the problem is only present for certain values of x.

  If this is the case I don't know how to change the data type.  The table contains double the conversion of the shape of the signal.

  Thanks for any help,

  Dave

  

  Hi TCPlomp,

  I just realized that I had x and is reversed in my entries "power x" function.

  Thanks for letting me know about polynomial screws.  Add those who should be more pleasant than to try to clean it.

  Kind regards

  Dave

• How to solve polynomial roots using MathScript

  I understand the examples use the roots.vi to solve 0 = Ax ^ 2 + Bx + C for the roots of the polynomial when the coeficients are known...

  But how to find the roots of the polynomials for 0 = Ax ^ y + Bx + C where y =. 625, for example?  Ideally, I would like to do this in matscript which I already use.

  I hope that this is a trivial question, but I'm over my head!

  Thanks in advance!

  
  

• Scatter chart: get the value of the label XYcursor

  Measurement Studio Visual Studio Professional 2012 2013 using,.

  On a scatter chart, it is possible to get the value of the actual label for a xycursor?

  For example, my label displays a date-time on the X axis format, it looks like: [04: 35:49; 0,27101]

  It is possible to get this value? For example, if I want to display in a TextBox?

  I am able to get the xycursor. Which and xycursorYposition but not what I want.

  Thanks for any help!

  Here is a solution to my question:

  {

  Get xy cursor index of the point in plot
  int index = xyCursor1.GetCurrentIndex ();

  Get values at that time (in the plot)
  Double x;
  Double y;
  scatterGraph.Plots [0]. GetDataPoint (index, ByRef x, y);

  X value to the DateTime format & convert to the format of the time
  DateTime t = (DateTime) NationalInstruments.DataConverter.Convert (x, typeof (DateTime));

  string time = t.ToString("hh:mm:ss");

  }

  It is also possible for which xycursor and convert it in the same way.