subset of binary string by string

Similar Questions

• Incorporate the binary string in the string spreadsheet file

  Hello LabVIEW wizards...

  So I use scripture to VI file spreadsheet to create a beautiful layout, tabs-delimited report of one of my programs for the acquisition of data file. In one of the cells in the resulting worksheet file that I want to put a binary string of all my control values so when you open the data file all the control parameters used for its manufacture are restored, but the string is hidden when the report is displayed in Excel.

  The problem is that the binary string flattened uses tabs and returns as part of its syntax the Spreadsheet File this VI to Write it's going in all directions. Worse yet, I can't unflatten chain when I open the file text because of "corrupt data or unexpected".

  If I concatenate the string flattened with quotes around it she is superb and is placed in a single cell in Excel, but when I open the file in LabVIEW that she is still several elements in the array. I've isolated the binary string using the file VI text reading and got a subset of the quoted string, but it still unflatten correctly.

  Essentially, I need to know how to get LabVIEW to pull a string literal full of special characters into a spreadsheet file and it unflatten. Any gurus what help you can provide is greatly appreciated.

  Thank you

  Jordan

  Jordan

  I suggest that you change the formatting of your chain shipped by replacing the tabs and returns with other characters that are not considered as commands by the spreadsheet functions. Without knowing how you represent your control binary values, I can't offer specific characters.

  If two non-printable characters exist which do not appear in the control data, it's easy: just find and replace tabs and returns with those characters.  If there is no character, then something more complex needs to be done for example to escape special characters.  Or create two subVIs - one to remove the tabs and returns before writing the string in the file and the other to restore after reading.

  Lynn

• little binary string in array (of TCP read) to the table of Boolean LV (and back)

  I would like to ask what is the easiest way for the next conversion? We use aTCP Read function to read an incoming binary string to a S7 API using LabVIEW. We know that LabVIEW stores a Boolean value to 8 bits. The incoming binary string contains 14 bits (representing 14 indicators of status). What is the best way to convert these values of 14-bit LabVIEW Boolean table?

  In addition, we send a LAbVIEW Boolean table in the PLC data (to write a TCP) string containing status bits.

  Thank you very much!

  Martins wrote:

  This 30 bytes contains some data more, including 14 bit flags (size is 14 bits). Since the PLC cannot put 'together' (16-bit) words at his side before sending data TCP, 14 bits is padded with 2 bits holding no valueable info.

  Then the solution is simple.  Take your 2 bytes and unflatten in a U16.  Then use Boolean table number.

• By the way the table of Clusters with binary strings via adapter LabVIEW

  I need to go through LabVIEW adapter table clusters containing binary strings.
  These data will be subsequently stored in the MySQL database.

  I need to force the option "Binary string" for the ValBinary element, even if my output array is empty.

  Is this possible?

  Used versions: TestStand 4.2.1 + LabVIEW 8.6.1

  Attached file: valbinary2.vi containing the clusters of test output array.

  Howdy Jean-Louis,

  My apologies, I'm not quite your question. You're right that LabVIEW does not know that a string is a binary star strong; LabVIEW, chain stores in a format of Pascal, looks like all the strands in the same way. Because TestStand stores strings in the C type format, on the other hand, the null (0x00) characters can be confusing when interpreting strings in TestStand as you learned to understand. That is of course why TestStand offers the feature to interpret strings as binary strings.

  As Sylvie refers to his post, to illustrate his point I created within TestSTand an array of the same type of data customized to store past out of your valbinary.vi of test data. Test patterns, I also edited the outputsome constant values to the cluster VI. (See the following screenshot). Note that the last string (named ValBinary) in the cluster contains a hexadecimal string with a null character that is inserted as the 3rd on-screen character (before the actual end of the string).

  

  Here is a screenshot of the created sequence file that calls the VI and then displays the number of items in the table from the VI to the user.  Note that the Locals.MyTestData table is empty before the execution of the sequence.

  

  Finally, as the execution of the sequence, I opened the Variables pane to view the contents of the Locals.MyTestData table. Here, I have confirmed that the "binary" string of LV was successfully passed in and stored by TestStand.

  

  Finally, the popup message in the second step of the sequence shows indeed a message indicating there were two elements in Locals.MyTestData.

  This sequence has been able to run successfully even without manually specifying a size of Locals.MyTestData beforehand. TestStand dynamically allocated the necessary elements to store the results of test valbinary.vi.

• How to parse a binary string

  Hi people,

  I read a binary string to a Sonic anemometer of campbell. It is transmitted via RS 232 9600 baud. The problem is the following:

  I read the entry stamp from time to time (all 300 ms). The outpit of the sonic is much faster (every 30ms). There is only a certain amount of stored bytes I've read. To get a correct value, I find 2-byte endpoint AA HEX and HEX 55. A complete sentence consists of 12 bytes 10 bytes each endpoint U8 values and 2 bytes. How to search for them?

  My idea was to see how many bytes, I read, convert each in a binary table and then show them as boolean table all together (see annex VI). It works but I can not find the expression just binary AA Hex and 55. And it is as interesting as the first column (bit 0) and last (bit 7) always remain 'false. ' I'm doing something wrong?

  So it would have been more useful if you would have posted the example that has been read data.  Because I didn't have everything I've done a few.  The attached VI will look for places where the hexadecimal byte AA then 55.  It then divides the sections of data using this information.  I wrote it two ways because I was typing this I thought of a better way that uses string functions to break the data into a data table.

• How to convert the binary value to a binary string in labview?

  Hi all

  I need to convert the binary value to a binary string. We have decimal or hexadecimal or octal number to decimal string, hexadecimal and octal string

  Hi pgm, use the function 'Format to a string. See the attached example. "%b" is the binary number in number in string format specifier.

• Regular expression help please. (extraction of a subset of the string between two markers)

  I haven't used regular expressions before, and I can't find a regular expression to extract a subset of the string between two markers.

  The chain;

  Stuff of header I want
  Stuff of header I want
  Stuff of header I want

  Stuff of header I want
  Stuff of header I want
  Stuff of header I want

  6 ERRORS
                       
  Info I want to line 1
  Info I want line 2
  Info I want line 3
  Info I want to line 4
  Info I want to line 5
  Info I want line 6
  END_ERRORS

  From the string above (it is read from a text file), I try to extract the subset of string between ERRORS 6 and END_ERRORS. The number of errors (6 in this case) can be any number from 1 to 32, and the number of lines I want to extract will correspond with this number. I can provide this number of a caller VI if necessary.

  My current solution, which works, but is not very elegant;

  (1) using Match Regular Expression for the return of the string after you have synchronized the 6 ERRORS

  (2) uses the Regular Expression matches to return all characters before game END_ERRORS of the string returned by (1)

  Is there a way this can be accomplished using 1 Regular Expression Match? If so someone could suggest how, as well as an explanation of the work of the given regular expression.

  Thank you very much

  Alan
  

  

  I used a character class to catch any word or whitespace characters.  This put inside parentheses a substring matching the criteria that you can get by developing the node for regular expression matching.  The \d matches the numbers and the two * s repetition of the previous term.  So, \d* will find the '6', as well as "123456".

• binary string to number

  Hello

  I would like to convert a binary string of the form: "000011' to a numeric value (3).

  I tried to use Byte Array to the string and then use the decimal number string, but I gives me 0 all the time

  Thank you

  Use a function of Scan chain with %b as a format string.

• Ascii to binary string string conversion

  Hello

  I am fairly new to LABVIEW but now I connect to a device using a serial RS232 cable.  In any case I use VISA read to get the output of the unit, and I wanted the device to return the output to ASCII format.  He is able to do, but now I'm stuck.  Now, I'm trying to convert this string of ASCII characters to a binary string.  In other words, if my release was a "Medley" of VISA Read, I have to be able to get a string that was '0111000101101110 '.  Any help is appreciated.  Thank you.

  This does not make much sense, because "0111000101101110" would be "SB" and not "QN". You want to throw a conversion 'lowercase' too?

  In any case, here's a solution that works with any length of string.

  

  This seems quite complicated. In general, it is easier to work directly in binary strings rather than binary to ASCII format.

• conversion binary string in a file

  I need help to decode a binary string. I get a binary string to a webserivce representing a .pdf file. I want to be able to view this file on my en somehow. I played with binardecode and what not but am having no luck. When I do a check to isbinary() on the channel it says that the file is not binary, but it is. (I coded the webservice file is sending me the same way and they are the same.) Anyone got any ideas?

  Normally, you do something like this:
  
  

  
  

  Then link to or display the PDF in the usual way.

• How to detect the Null characters in a binary string

  In my application, I send around real binary data in the strings and the flattened data structures and sometimes I'm in the null string. I was wonder if there is a way to NULL dectet characters in a string. Thanks for your help.

  Josh

  Josh,

  A null character is 00 hex.  If you use the match pattern and search of a null string, it must find.  To enter a null control set or the constant to '-' Codes view and type 00.

  Another way is to convert the string to an array of U8 and search in the table to 0.

  Lynn

• Hexadecimal, binary string.

  I have 33 bytes of data in hexadecimal format and do not know how he analysis of eleven pieces of 24 bits of binary data. I tried different configurations of hexadecimal string, number and Type of Casting, but have not yet been successful. I would like a table with 11 elements, each consisting of 24 - bit binary.

  The entry is formatted as such:

  (Hexadecimal display)
  4445 4647 4849 4A4B 4C4D 5051 5253 5455 5657 5859 5A5B 5C5D 5E5F 6061 AAAB AC 4E4F

  Please let me know if more info is needed, thank you for the help!

  There is not a 24-bit data type, so you will need to store them U32. You need to "pad" of your data so that it can fit.

  

• FUNCTION SLOW - subset of the string

  Hello everyone,

  in the image of attacched, I have a loop that goes through a 1 d array of strings, searches for items starting with "02" and went back inside their index in the array.

  The problem is that it is very slow, it takes about 18 seconds to analyze the overall picture of the file which is long about 20000 pieces. Since I'm on a PC, I expect to do the job in a few seconds.

  Any suggestions?

  Thanks in advance,

  Lorenzo

  OK, here's a few things I noticed that could slow things in:

  -Nodes of property inside the loop will definitely slow down your loop. It's also dead code - you must update the maximum on the scale once before the loop executes.

  -Local variables are also (I don't think marginally) slower than the use of the Terminal. LabVIEW is a data flow language: you must use cables to connect all things!

  -Using conditional indexation will cause dynamic memory allocations, because you have to resize the table... you could improve this by preallocating a table for the number of iterations in the loop and then resize the table at the end

• Unflattening a binary string of basket

  
  
  

• string in binary table

  Hello

  I'm trying to convert a binary string. The first part works (binary byte array), but I have some difficulty to separate the byte array in single bits that I can change the value (0 or 1). Does anyone have an idea how to do this? It will be great if someone has an idea.

  Each character is represented by its binary (second part) correspondent.

  Thank you very much!

  

  Hi winnie,

  Try this: