NaN correlation coefficient

Similar Questions

• find the maximum correlation coefficient

  Hello

  I am able 2 analog signals simultaneously from the DAQ 9233 module.

  Whenever there is a trigger, my DAQ will gather X number of samples from the analog module and a cross on the data correlation analysis.

  My question is how can I get the maximum cross correlation coefficient between the two signals (e.g. North is my reference, how many samples should I change my South to get the maximum correlation coefficient)?

  My goal for this?

  This is so that I can get the time between two samples (e.g.sampling to 50 kHz, if I need to move the sample 300 times, so I know my delay is 300 * 1/50000 = 6ms)

  Thank you.

  Attached a picture of my waveforms

  North = my reference signal

  South = my 2nd signal

  Low = Corss correlation between two signals

  I'm sure that the maximum value of the cross-correlation function is the location the highest correlation coefficient.  Using your own example to verify this.

  Search the index of this value.  Subtract the size of the reference (in the X of entry) of the peak value index signal.  The value obtained must be the number of points which is equivalent to one quarter of work.  Divide this value by your sampling frequency (50,000 in your case) and you should have your answer.

• Deviation and variance and correlation are return NaN results

  I'm new to statistics with Labview, and I am changing the example of statistics in Labview by reading a column in a table to csv and then doing the analysis of statistics data. I tried to make it work, but when I run it, I get results NaN for the standard deviation, correlation, Kendall correlation of Spearman and no results for the Covariance.

  Can someone please help me solve this VI?

  Thank you.

  I just corrected the error. The problem is in the input array.

• How to work on the coefficient of correlation of Pearson on the numbers

  Hi there, I was wondering how to determine the coefficient of a set of data in numbers.

  It's the set of data that I have.

  Thank you

  Taking a quick, without testing my formula

  = SUMPRODUCT (C, E) / (SQRT (SUM ((D)) * SQRT (SUM (F)))

• When I use the mail merge with excel file, after I press ok the progress bar indicates "NaN", mail project window crashes. My record is nice little CVS n

  When I use the mail merge with excel file, after I press ok of the progress bar indicates "NaN", mail project window crashes. My file is in the correct format and small size (4-column 4 raws). I use an English version of thunderbird after accidentally, I installed one in my tongue.

  I am attaching the screenshot

  I solved the problem
  has been st@pid excel

  I created a CSV file in openoffice calculator and everything went smoothly

• Who's who and twitter stop working. NAN's Yearbook through what?

  I AI YOONO AND IT CONNECTS FACE BOOK and other sites for a reason that updates are marked NAN I'm not sure what it means. Twitter says my session has expired I try to reconnect yoono says it is connected but it is not.

  Start Firefox in Firefox to solve the issues in Safe Mode to check if one of the extensions or if hardware acceleration is the cause of the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > appearance/themes).

  • Makes no changes on the start safe mode window.
  • https://support.Mozilla.org/KB/safe+mode
  • https://support.Mozilla.org/KB/troubleshooting+extensions+and+themes

• HP50G: correlation

  Hi, I have to make a correlation between the experimental data but I don't know what to use: LSQ or adapt data?

  I have this equation

  B = x + y / A

  And these data

  B1 =-281.5

  A1 = 240

  B2 =-201

  A2 = 250

  B3 =-166

  A3 = 275

  B4 =-138

  A4 = 300

  I read the guide for 50g, but I can't solve my problem

  Thanks in advance

  Hello, Mrs92!

  The HP - 50 g did not have a built-in commands to resolve this problem.

  It is possible to solve this problem for the correlation given by using the method of the "Non-linear least square.

  You can write a program for HP - 50 g using this method.

  Please visit http://en.wikipedia.org/wiki/Non-linear_least_squares.

  Try the program:

  (Note: ' B = x + y / A '-> ' y = a + b / x "!)

  < < - > PUSH ∑DAT TRAN AXL Q OBJ - > DROP
  -> XI YI
  < < XI INV ∑LIST EVAL
  ∑LIST XI INV SQ EVAL
  YI ∑LIST EVAL
  XI YI / ∑LIST EVAL
  XI-> Q
  -> SX SY SYX SX2 N
  < < [' N * a + b * SX = SY' ' SX * SX2 has + * b = SYX']
  [ 'a' 'b' ] FIX
  1 GET OBJ-> DROP - 105 SF EVAL SWAP
  SWAP EVAL ' y = a + b / x ' UNROT
  > >
  > >
  POP
  > >

  Save the program as "InvFIT".

  Example. Print the following in MTRW:

  240 - 285.1
  250 201
  275 166
  300 138

  Save it in the ∑DAT variable by using the STO∑ command.

  After running the program, the stack will look like this:

  3: "y = a + b / x".
  2: a = 386.084992747
  1: b =-153989.42753

• weird Word NaN in mac store update

  Hi there guys just went to day el capitan 10.11.3 and he has that in the download bar

  anyone has an idea what this NaN GB means its all just curious

  

  It means an undetermined and suggests that a division by zero or any other undefined mathematical operation has been completed during the attempt calculate the result.

  (138629)

• Multiple comparisons on a single Data Source: NaN vs large number

  Hi all

  Work in 2013 of TestStand and came across a situation by measures of DMM, in which several values would be acceptable for the comparison of the limit.  For example, if I make a measure of resistance, and I expect to be a very high value, for example more than 1 M, I would insert that as the lower limit.  However, there are also situations when I could see the result of "NaN" on the meter.  For the purposes of the test, any number greater than 1 M would be acceptable, but a result of NaN would also be acceptable.  In an effort to keep the modular code and reusable for many cases, I'm curious to know if there is a way in TestStand to compare the result of the test against two values at the same time, (i.e. > 1 M OR = NaN).  Please notify.  Thank you.

  GSinMN

  put this in your low limit:

  Step.Result.Numeric is NAN? NAN: 1000000

  Hope this helps,

• a timestamp correlated

  Hello Forum,

  My previous post is left unanswered , and so I stumbled through on my own. My goal was to perform time correlated anticipated spectroscopy. I use a 6321 X series DAQ card, a Perkin Elmer SPCM and a pulsed laser. I'm exciting a sample with a laser and wish to obtain a precise timestamp of the first photon detected off the laser. I then repeat the measure to build a histogram from where I can get the life of my sample (~ 1 micosecond).

  As I understand it, the counter on the X series cards cannot retriggered. My solution is to reset the counter with the falling edge of the signal modulating the laser then timestamp that the first photon after it (attached). Right now my program gives me the timestamps of all photons in the buffer zone, but I want only the first. Is there a way simple and elegant to get just get the first element in the buffer on each stop without slowing down the Data Acquisition loop?

  Thanks in advance,

  R

  A few changes of vi...

  > Is not enough for me just remove the second stop event structure in the loop of the consumer.

  It is preferable to one producer in a loop. consumer is also control loop that is to handle the controls of the usr.

• Cannot find IMAQ functions: IMAQ in correlation, analysis of particles IMAQ able Studio 2015

  Hello.

  I wonder if someone is able to help me with my questions as I am a little confused with what packages are available for my intention. I use LabView 2015, .net 4.5 and Measurement Studio 2015 (for .net), Visual Studio 2013 update 5. For LabView, I installed IMAQ Vision Acquisition Software February 2015.

  After installing Measurement Studio and try its features, I am able to find functions like Savitzky-Golay LabView signal processing in Measurement Studio under the namespace NationalInstruments.Analysis.Enterprise in .NET.

  However, for functions of LabView IMAQ as convoluted IMAQ, IMAQ in correlation, analysis of particles IMAQ, I am unable to find corresponding calls Studio 2015 able. How can I get these functions?

  Thank you.

  Nevermind, I think I've found my own answer. Measurement Studio 2015 contains only the LabView functions that can be called in the c# language. However, if you need features IMAQ, you can buy NI Vision Development Kit. The kit only supports .net 3.5.

  For new projects, use the NI Vision OpenCV support.

• problem with / s digital correlated on USB-6341

  I'm testing an application that fact/s digital correlated, written in C++ with a USB-6341. I use NEITHER-DAQmx version 16.0.0f0.

  Because this application will be used by people with a variety of different DAQ hardware, I tried to write it to manage a lot of contingencies. Then when I put in place a DIO task correlated for the release, I'm trying to determine the width of the channel:

  uInt32 dataBytes;

  If (NIerror = DAQmxGetWriteRawDataWidth (h, & dataBytes))

  On my USB-6341 dataBytes returns 1, so I try to write data using DAQmxWriteDigitalU8(), but which returns an error saying:

  device USB6341:-200565: specified the digital channel contains more bits than supported by the 8-bit version of DAQmx Port write.

  Use the version of DAQmx Port write who takes in charge the broader digital ports.

  If I remove the test and force it to use DAQmxWriteDigitalU32(), then it works.

  I'm afraid that if I try to always use DAQmxWriteDigitalU32() I may be wrong with other devices that do not support 32-bit channels.

  Is this a bug in NOR-DAQmx associated with USB-6341? Have I misunderstood something about how it works?

  John,

  It seems that it is a known issue with DAQmx and a corrective action request was filed for this problem. For now, using the DAQmxWriteDigitalU32 should work fine if the device has ports 8-bit or 32-bit.

• Vi return NaN mode

  I use the function to calculate the value of a table mode and it returns NaN. Help of LabVIEW says that she only returns NaN at the entry of the array is empty. I don't know why this is happening. My table is

  0,00015

  0.000114

  0.000146

  0.000188

  0.000139

  I tried with value mulitple of intervals.

  

  Thanks in advance.

  In this case, NaN means that no method has been found.  Look at it this way... you have a group of numbers and say to LabVIEW for break in 1000 separate "bins." If each tray has only 1 value in it, then there is no mode - no value that appears more often than other values.

  For all of your data, any number of intervals of < =="" 14="" will="" return="" a="" mode.=""  any=""> 15 returns NaN.

• Why does the period display NaN? What does it mean "NaN"?

  I have a vi that is supposed to measure values of period 3 and 2 tension using DAQmx.  The vi is attached.

  When I run the vi, I get no error, but one of the counters display NaN instead of a period (in seconds) value.  Why would this counter not appearing?  See the .jpg image of the screenshot, which shows the lights on the front panel, after execution and stop the vi.  Note that the period 2 shows "NaN" but, period 1 and 3 show a real value.  "NaN" only displays in "period 2" executing too. ' " "Period 2" never displays a numeric value.  Moreover, as "NaN" actually mean?

  Appreciate your thoughts.

  Thank you

  Dave

  (using 3 counters in the cDAQ-9174 and the module OR 9401 plugged into the chassis cDAQ; periods are measured from the encoders)

  NaN means not 'a number '.

  In your code, Mean.vi will return NaN (with the error-20003) if the input array is empty.

  What happens if you connect the signal of the 1 meter or 3 to counter 2? If NaN disappears, then there is a problem with the signal currently connected to the meter 2.

  1. Your current code, using usrs to (unitialized shift registers), will produce NaN when running for the first time.
  
  
  2. The size of the usrs to will increment at each iteration.
  
  
  3. If your VI is used as a Subvi, the means will be bad for the first 15 iterations since they will be calculated with the values of the usrs to--> previous lengths.

  You must use PtByPt.vi means that will calculate the average of the X last values without above mentioned problems.

• NaN values in table

  Hello

  I got a code made by my colleague who is no longer with us. In a column of table 8 and not generated by program. lines to initialize all values such as NaN values. I've never met before NaN values.

  Research, I understand this isn't a number, but it's not really make much sense to me. Why the table cells are written as NaN? What is the meaning of NaN? Can I leave empty cells and not showing no no NaN inside?

  Kind regards

  Austin

  Ok. Yes, I now understand the meaning. So if I create a table in the future and I want to configure a few lines to NaN values. How can I do. Is there a constant called NaN?