U32? I32

Similar Questions

• U32 + "digits of precision" (?)

  Hello

  What is the meaning of this behavior?
  Is this expected behavior? and, if so, why?

  I asked this question before on the french forum (french is my mother tongue)... here ... but I don't have all the answers.

  

  For a U32 (even for an I16, I32, U16,...), is it normal to be able to define the "digits of precision?" (for me, which is meaningless)
  In addition, this may cause display errors (79,99999..)

  

  What is your opinion of that?

  Thank you all (and sorry for my bad English)

  Digital controls is not an entire display format, just a floating point format.  It is also probably related to the other s format that would apply legitimately to integers, (such as scientific notation which would use two decimal values and still be an integer 1 million = 1e6 999,9999 would be 9.99999e5.

  So, you take an integer value, and it passes through code designed to return the floating-point values and also technical and scientific notation.

  There is no specific reason why you do not want to display an integer with digits after the decimal point, so 0 digits of precision would be normal.  But there is no reason to prevent a person only to display decimal digits.   And when you get down to the display of 16 digits of precision, it doesn't surprise me that you reach the limits of numbers floating point, which is the underlying code that should be used to display decimal values on integers.

  At the end of the day, I think that this could be considered expected behavior and not anything that anyone would cause problems in the practical world.

• Set the format digital u32 when writing of TDMS files

  We use two meters of a PCI-6251, with two counters in the mode of angular position, to measure the angular positions of the two optical encoders 1000 per second for intervals of 10 to 20 hours.  We are writing to write files using PDM.  The files are very large, about 800 MB, but it is acceptable.  Convert us the TDMS files in .txt files, and then the data from .txt files are analyzed in Mathematica.

  My question is: How does one control the digital format of the data that is written in TDMS write?  At this moment we have two counters of the value of the product N = 10000 numbers U32 samples are then transmitted continuously to a TDMS file every 10 seconds.  The counters are using units of ticks (integers) and we would like to see whole in our data files.  We are convinced that the counters are producing U32 to the format number, since we see the correct U32 integers in the indicators on the front panel and we see labels on the value axis on our waveform graphs are integers, not real numbers.

  But it is also clear that Scripture TDMS puts double-precision (64-bit) numbers floating point in the PDM file, not numbers of U32.  The double-precision floating-point numbers cause our .txt files to be twice as big as they should be - these .txt files are half full with useless zeros and decimal points.  In addition, when you convert the U32 to double-precision real numbers, it seems to be a loss of precision as a result of writing of PDM, which is not acceptable.

  Our experience produces pairs of integers: U32 (or I32) format.  We could even get away with numbers I16.  Is it possible to get our data to stay in U32 (or same I16) format when they are written to the TDMS file?  What controls the digital numbers written to tdms?  Do all the numbers written in a PDM file end up being written as floating-point numbers double-precision?

  We use LabVIEW 8.2 on a PC running windows XP.

  If associate you TDMS write U32 data, data in the file will be U32. Floating-point conversion probably occurs when you read data from the file back. You can change this by plugging in a U32 empty table at the entrance of 'data type' reading PDM.

  You can check the data type in the file by examining the channel properties in the viewer of TDMS files. If NI_DataType is 7, given in the file are U32. If it is 10, data are floating point.

  Hope that helps,

  Herbert

• I32 flipping index iteration continuous data acquisition

  I'm doing some continuous data streaming with Labview FPGA and periodically generate a trigger signal

  the timestamp after a number fixed iterations.

  The strategy I would try was to review the iteration index in the timed loop and whenever he tipped a fixed number I would generate a trigger of the FPGA.

  I tried to find out what happens when you get to 0x7FFFFFFF samples on the register of I32 and apparently

  the index does not roll... It just remains to count max once reached it.

  Is there a way to derail the index on a timed loop? Otherwise I wil just add another

  U32 variable and increment it each cycle and let it roll on.

  the iteration count does not roll.  Therefore at this historic moment, but just use a registry node, local or feedback shift instead.

• Polygon color with RGB U64 images / Image conversion of RGB U64 in RGB U32

  Hi guys,.

  I want to use the color polygon feature, but I have an input RGB U64 image. The only supported is image RGB U32 type. Is it possible to convert the image to U64 U32 and use the color polygon feature?  I know I'll lose accuracy, but what for the moment.

  Otherwise, you know the functions of polygon that supports RGB U64 images as input?

  Please let me know.

  Thank you

  ARE

  IMAQ Cast Image VI Converts the current image type for the image type specified by Type of Image.

  How Casting works: The VI shifts the value from the source to the range of 8-bit using the depth of specific bit of the source image. Then the VI defines each color component in the destination value for the corresponding component in the value of the source.

• SGL and variable U32 are wired to same variable DBL through the structure of the case, block data poster SGL DBL during case U32.

  Hello

  Here, I have attached an example, similar code module is used in our project.

  In this example in the control of two structures business SGL and U32 panels is directly related to the signpost DBL. If I give 4294967295(U32 value of maximum range in the case of forgery under the example) its display 4294967296.

  Please give me the solution to show the correct value of U32 in signpost DBL.

  Thank you

  Wherry

  In your code, 4294967295 is first converted to the SGL (on the edge of the box structure), then to the DBL. But this value may not be exactly converted SGL (due to lack of significant digits).

  You should convert the SGL DBL value in the case of true.

• How to divide numbers (U32 to U8)

  Hello

  How to cut a number of byte values (U8)? I found the 'number of Split' - thing in labview. What should I use twice to U32? (first 32-> 2 x U16 and U16-> 2xU8).

  Or is it also a more rapid/more elegant way to do it?

  Thanks for help

  You can simply use the Cast of Type function to convert an array of U8.

  

• convert I32 U8

  Hello

  I have a problem during the conversion from my table.

  I have a table 1 d of 32-bit integers for a long time.

  I would like to convert a table 1 d of the 8-bit byte unsigned integers.

  I try to use the conversion u8 block, but the result I get is a 1 d table that I accepted, but all my item values are transformed into zero rather than keep the original.

  can someone help me?

  Hi koekie,.

  (1) you will have problems to convert I32 numbers greater than 255 (or smaller than 0) U8 values, both get forced to the U8 line possible!

  (2) you don't say you are trying to convert the values.

  (3) are you really want to convert your table instead of convert? What kind of result data do you really need?

• The I32 IMAQ display

  Hello

  I I32 table to display and I found nothing in Google.  any expert here know if there is a way to display image I32?

  I tried to use Fillimage to see if there's a way to work around, see attachment with the data table.

  of the testDatadisplay.vi, I see that the value of Fillpixel change on the image, but I can't see pixel color change on the image, whatever the ColorFill I select.

  take pixel [2.2] for an example:

  It has original-(2^31) value (this is the value for all the background pixels outside the circle), I connect this value to the ComplexPixelValue

  I want the value of-(2^31) be replaced on the image as the value of FillPixel, and I also want this pixel color to change to ColorFill.

  That is to say, I want that the area outside the circle on a different color as in the example shown.

  It seems that the value of FillPixel can change the mapping of the entire display, regardless of some ColorFill I choose.

  It is the job of mapping how IMAQ display (on any database value and adjust the mapping)?

  I chose the funaction Vi right to do this? or is it difficult to Labview?

  If we cannot fill pixel color, which is the object of function colorpixel Fillimage?

  Thanks for your time in advance.

  XG

  For the benefit of the users of the forum, this has been fixed in the following way:

  Rather than using IMAQ and with regard to your data file an image file and the manipulation that we found it was easier to use a graph of the intensity and the graph have read the data file. By analyzing the chart, we have seen that the maximum value of the circle, IE the development of intensity, had a 317 value and the minimum value was 237. We were then able to associate this into 5 blocks of color from red to purple, panoramic the Rainbow. When we are separated from the Rainbow to the sections, we also found that the numerical value associated with each color. We were allowed to get the desired effect as your ideal image, with a rainbow texture image.

  Then, we found that the value of the background would be just outside the boundary of the circle, then we have placed such as-238 and associated with the black color him. Then, we used a block of color that would be used to change the color of the background.

• Conversion of 3 bytes in an I32

  I have 3 U8 bytes in a table (a byte received 24 bit number). How can I convert them to compliment of 2 number of I32 for general use?

  I wanted to do a .vi I can get value in addition to 2 from content to any position in an array of U8. My problem is that I have a byte stream that feeds coded values that can be 32-bit, 24-bit or 16-bit in size. I wish I could get out somehow the parameter "type" to make it really versatile. Do you know any VI that already do this?

  I may even face values of odd size as 10bits!

  Thank you very much for the solution simplified. I can just go with a code tailored to each type of extraction that I need to do easier.

  I'm starting to see parallels with C. Although I still think that a shift would be useful. As much as the Type cast operator ideally positions the value it reads his entry, at the upper end of the 32-bit value.

  Thanks again.

• DBL to I32

  Hello

  I would be grateful if someone could answer this question. Why 1 is divided by 2, the answer is 0 if the response uses the I32 data type? But 3 is divided by 2, the answer is 2 If the response uses the I32 data type?  5 is divided by 2, the answer is 2 If the response uses the I32 data type?

  Thank you

  Steve

  As mentioned, rounded going to the even number nearest when X.5.

  If you divide whole (and now with integers) numbers, you really should use the Quotient function & rest instead.

• How to convert U32 matrix 8-bit grayscale image?

  Good day to all,

  I got a U32 512 * 512 data table of photomultiplier using the analog inputs of the DAQ card. My question is how to convert this matrix 32-bit to 8-bit monochrome image for display.

  I tried the method in this post to convert grayscale image https://decibel.ni.com/content/docs/DOC-4155 table but the result resembles an outline rather than the actual image. I guess that's because their contribution to flatten Pixmap is 8 bits, but mine is 32-bit. I have a gamma correction to the scale of my data? But how?

  I have attached the original image, which is a particle. I have also attached my labview code and the processed image.  Thank you!

  Then, you will likely make you own custom conversion then increasing the difference between the brightest and darkest. You could just do 4294963840 the zero and 4293967276 the max and scale up to 0-255

• 'Variant to data' fails to convert a Variant I32.

  

  I read a whole number of a database that was returned as a Variant.

  The value is 25, but if the VI it converts in I32, the returned value is 0.

  Why is it? How can I solve this problem?

  CITA wrote:

  The value is 25, but if the VI it converts in I32, the returned value is 0.

  Try to use the Variant instead of the data data database ranging from:

  

• Get all the different values in a table - 'or array elements' does not work with I32

  Hello

  I just found out that "array elements or" does not work with a table 1 d of integer values. I didn't expect that.

  I did a semi quick forum search and did not find a pointer to an effective solution. Can someone give me a hint?

  Do not back my initial intention is to list all the values that appear in an array of integers.

  I thought that if I converted the figures for powers of 2 and or I had solved the problem at hand - only to discover that the elements of array does not.

  If someone could propose a different approach, I'd be happy too.

  I should mention that the execution time is a factor here - I need a fast code, but any suggestions are welcome because they could help me get started.

  Best regards Florian

  Hi Florian.

  try this:

  

  "Function, it seems, the table of GOLD ' is polymorphic (as written in the context-sensitive help), but does not support arrays of I32. At least the error message means just that...

• CWIMAQdx.GetAttribute failed to get attributes in the string or format U32.

  I'm reading all the attributes of a Gige camera. I can get the I64, F64 attributes and Boolean marker. But when the type is string or U32, the returned object "attribute" is "NULL". Can someone let me know what is wrong with my code?

  Thank you

  object attribute = new object();

  if(stype=="I64")

  {

  CWIMAQdx.GetAttribute (sid, attributeInformationArray [i]. Name, CWIMAQdx.ValueType.I64, out attribute);

  sValue = Convert.ToInt64 (attribute). ToString();

  }

  If (sType is "String")

  {

  CWIMAQdx.GetAttribute (sid, "attributeInformationArray [i]. Name', CWIMAQdx.ValueType.String, out attribute);

  sValue = Convert.ToString (attribute);

  }

  If (sType is "U32")

  {

  CWIMAQdx.GetAttribute (sid, "attributeInformationArray [i]. Name', CWIMAQdx.ValueType.U32, out attribute);

  sValue = Convert.ToUInt32 (attribute). ToString();

  }

  Is it just a coincidence that in your second two cases (you mentioned do not work) your code example seems to be passing the constant "attributeInformationArray [i]. Name"rather than the actual attribute name?

  Eric