Histogramming

Similar Questions

• reset the histogram

  I created a histogram by making a great picture with 600 items for each of the bins. The histogram is working in that it collects data, but it does not keep the program. It resets itself after a while and back to zero and continues to rely. I need to be County all the time of execution. Any ideas on the problem?

  BluesKnight,

  I think having solved the problem by taking the output of the histogram table and add to the registry to offset. I'll have to keep in mind the limitations of a 32-bit integer, because it run for a while.

  Thank you for your help in this matter.

  ssmcd

• Using the data from the text file to the plot on a histogram

  Hi professionals of the NC.

  I have a data file text attached with 3 columns of data and I would draw it with a histogram.

  Unfortunately, the histogram data to create will not let me extract the values I want to draw it...

  I've seen some of the older ones on how to do that, unfortunately, it was a very long thread and the screw, images have been corrupted.

  Someone has a great solutions for this...? Really appreciate it!

  Hi Lexen,

  no need to use ExpressVIs:

  

  I used the simple histogram function, there is a step where you can provide more parameters. And I used LV2011, so the ReadSpreadsheetFile function looks different than in the latest versions of LabVIEW.

  in the desire to tell graphic C Red, G will be blue and D in green...

  I don't know what means DMC, but change properties parcel should be pretty easy!

• Native histogram VI seems to have error

  Hi all

  I worked on something where I need histograms, but it seems to me that there is something wrong with LabVIEW vis native.

  As an attachment, I send you an example I did to support what I say.

  I want the histogram to have 1,000 locations with the minimum limit equal to 0 and the maximum limit equal to 1. The histogram is generated from 500 random values.

  The problem is that I can't do the histogram to have locations limited between 0 and 1, including 0 and 1.

  Maybe I'm just something wrong, but it would be interesting to have your comments.

  I thank very you much in advance!

  Best regards!

  You should read the "detailed" for the histogram function help. The values of X are centers of the bins. For bins of 1000 also spaced over the range of 0 to 1, the first location is 0 to 0.001 (0.0005 Center) and the last of 0.999 for 1 (0.9995 Center). The histogram function does exactly what it is documented to make.

  If you want your slots numbered from 0 to 1 inclusive, you need 1001 of them, on a beach-0.0005 to 1.0005.

  Cameron

• How to import a csv file in a histogram

  Hi, I'm looking for a way to be able to import data from a csv file in LabVIEW 8.6 have it create a histogram chart. I've seen this done before, so I know it's possible, I just need to some resources are started vi get me in the right direction. I have thousands of entries, and it gets teadious importation vi macros QI. Does anyone know of a vi, or the Toolbox that will give me the building blocks to do so. Appreciate any help, thanks, AJ

  Bob, the op clearly LabVIEW 8.6.

  AlphaDog,

  You have a shortened exaple of the data file you?  There are several channels or just one?

  No matter, if you look in mathematics-> palette of probability & statistics, you will find a Histogram.vi that will take a table of data and do a histogram out of it.  To display it, use a chart and change the type of route to be a bar chart.

• Better histogram

  Guys,

  I am writing a program that's going to count the number and extent of the disruption to a load cell and saves this information in a histogram.  That the data are then sent to an excel report for the convenience of other users.

  My problem is that if you look at the attached jpeg, (the histogram and a waveform graph sum test) you can clearly see that there are only 4 disruption.  Can someone help me understand why my histogram says there are 5?

  Thank you

  Hi raging_engie,

  I think the confusion here is from how the histogram function.

  The histogram function is not the number of peaks in a certain range, but the number of samples in this range.  It's a little hard to say on your screenshot, because the waveform graph connects samples with lines, but I believe that in one of your biggest summits, there is a sample of the order of 7-8.

  Have a great day,

  Chris V

• Spectral histogram of adc output

  G ' Day all the

  I have a LabVIEW task that I'm confident should be dealt with before (several times). However, not for the life of find me a solution documented. It's displaying a range of possibilities of an ADC on a histogram channel (no, not the statistical flavor - the spectral version of science).

  I have a 8 k ADC front-end DAQ loop which (for reasons of this example) gives me the amplitude of incoming impulse (value between 0 and 8191). In this loop, I would a 'live' spectrum in real-time of the cumulative number of hits by way of the ADC.

  I can think of ways using an 8 k array and incrementing the bins manually but how to get the data in the table persistent in the loop... and actually display.

  If I have to invent my own wheel to solve this problem while it is OK, but I'm sure that like most of my brothers of coding, I'd rather use someone else

  See you soon
  Steve

  Look at this example of a histogram. Which is similar to what you need?

• Create histogram intenstiy fast without Vision toolkit

  I am trying to create a histogram of the intensity of an 8-bit grayscale image that is absorbed from a USB camera.  Using the drivers the camera supplied with the camera I am able to get a table 2D image data (1021 x 764).  What I do is to concatenate all the columns in the table to create a table 1 d.  I then use the General histogram function that is configured for a maximum of 256 bins 0 and 100 min.  This approach takes about 5 seconds. to complete. My approach is attached.

  Is there a better approach that process much faster?

  If I use Vision functions to convert the image into an IMAQ image data, then using the polygon IMAQ function, he treats almost immediately.  However, I do not want the functions of Vision because I don't want to pay for a license of execution of Vision for each installation of my application.

  Thank you

  Terry.

  It is the easiest way to get a histogram.  Is it fast enough?

  

  This will give a 256 - bin histogram, but I noticed HES you want 100 locations for some reason any.  To do this, the easiest method is to scale your image included between 0 and 255 0-99 (multiplying by 99/255) and do the same thing, something like this:

  

• histogram with just a few columns from a table

  I want to get a histogram of a few columns from a table (4 - 6-... 22)

  

  
  

• Question of the histogram

  * See Appendix VI

  port 4 (can forget the other ports) the graph of the histogram, it produces a graph of a table 1 d of a cluster of 2 elements. I want a graph of just a cluster of 2 elements, I did this for the rest of the project and not the table 1 d. any ideas?

  In generate_hist_Generic.vi, you HIstogram.vi inside a loop, and you send the output through a tunnel of indexation, which translates into a table.

  Because your vi (hist.vi) call passes an array of single element, the loop will iterate that only once, and the result will be an array single element.

  You can use the table to Index to get the item.  See attachment.

• How to rebuild the waveform with zero new and create histogram type of waveform?

  Hello everyone, I have an application where I need to rebuild a waveform using some amount of 'x' of the data samples. the conditions are:

  1. the new zero of the new waveform is peak value frm the old form of wave., allows to assign this value of y s.

  2. based on this peak value, I have to draw points of sampling (y - t) and (y + t)...

  the waveform above may look like a histogram, but isn't exactly a histogram... can anyone suggest a concept?

  I'm not able to take the time to "throw in a sample VI.

  But if you look at the help file get the subset of waveform, you will see that he has all the inputs you need.

  There is an enum constant that allows you to choose samples or time.  I would say that the samples since this is what will come from most of the table Max/Min detector or Peak live

  There is a sample start time.  Put in the value of your Ridge detector less t.

  There was a time.  Put in the value of t 2 times.

  If t is the time, you may need to convert to samples based on your sample rate.

• Histogram

  Hello

  I'm trying to generate a histogram of data from the oscilloscope. The data is a kind of noise. The problem is that the data is already bin - ed the oscilloscope and the binning is not constant. If I can use a histogram, the output will be largely dependent on the binning in the histogram. If I have for example the binning set wrong, I couldn't see some vertices or I could see a fall somewhere, just because a histogram bin counts 2 buckets of the oscilloscope and the other a 3 bins of the oscilloscope. Later, I get a Gaussian of the histogram.

  My question: is it possible to do a histogram on the data I receive directly from the oscilloscope, without attributing bins? And I can still fit my Gaussian data?

  Best regards

  Lorenz

  Edit: So I want to essentially circumvent the problem of interference between the 2 offering.

  I would now like to accumulate all the data points have the same value and get a distribution from that.

  OK, now I understand! I would call it a histogram without binning-extra:

  

• What is the difference between the VI of the histogram and the General histogram VI?

  Hello

  I did a google search and forum for this and came up empty. I would like to know if there should be a difference in how the work of both?

  I ask because I gave exactly the same table both X and was two different results, unless I also specified the interval bins / # to be equal for each of them. (level for the VI histogram and #bins for the general histogram VI)

  It also means I want to know the difference between the intervals and #bins? They are the same thing with different names just?

  It's more of a general idea on how the two screws work to obtain a specific solution to a problem, anyway, so any help is appreciated

  Thanks in advance.

  Pladio wrote:

  Thank you. No idea why the same data would give different histograms when the specification is not garbage?

  Yes.

  The normal VI, if you do not connect the entry "interval", will give you 10 bins, becaue that entry is set by default to 10.

  The advanced VI, if you do not connect the "#bins" of entry, will give you a number of bins from comment how are made, or the size of the incomming table. This number is 1 + 3.3 log n, where n is the size of the array. This is called rule of Sturges, and is more or less explained in the programming of this VI. Open it and look at it.

• the Sony Alpha 58 has a color histogram and if so, it is accessible before taking a picture

  the Sony Alpha 58 has a color histogram and if so, it is accessible before taking a picture

  Hi Pierre,.

  Color histogram option is not available in this camera.

  If my post answered your question, please mark it as "acceptable Solution".

• Histogram - the size of the interval?

  I use the general Histogram.vi to create a histogram of 100000 data points and I'll usually have a bin # 1000.  What I am trying to develop is how to determine if bin sizes are all the same and also to determine what really are the bin sizes, is there a way to check this?

  Also I don't know what to do, or the use, the component of the vi bins (in my vi I currently have in there but not wired it to the top), specifically if I want to use this function I have to specify a value of top/bottom/inclusion for each bac separately or is it possible to do on a global scale (for example could I said I want that each bin long to 10 data points).  Or is it, in a sense, covered by the number of bins I've selected.

  I realized my vi and some test data, I've been using, in case it helps somehow.

  Thanks for any help.

  Good Scott,

  Basically, bins entry overrides the max, min and #bins entries, I'll explain this further.

  The max, min, entry #bins will create distribution spaced between your max and min boxes. For example, 0-10 with 5 bins will give you 0-2, 2-4, etc.

  The entrance of bins is an array of clusters of:

  lowest

  upper part

  registration (can be 0-4: 0 has lower, 1 includes superior, includes both 2 and 3 includes neither)

  Yes, since a table you specify bins "custom". So, if you want a tray to go from 0 to 2, and then to go from 2 to 9, you can configure with this entry. If there is a nonzero entry for bins (as in, you've changed something else) the VI will ignore all entries to the max, min and #bins entry.

  I hope this helps!

• Histogram with text labels

  Histograms can be created in LabVIEW that have a digital number for the axis y and help text of the x-axis labels?  I want to be able to use the text to describe the bins on the x-axis.  You want to add names and not numbers to the x-axis.

  Simular to what they do here with tiara

  http://forums.NI.com/NI/board/message?board.ID=60&message.ID=7283&query.ID=598915#M7283

  Hi Matthew,

  The only solution for that Q (I know) is to use an image control to display text as I showed in this threadlabels.

  

  Ben