Numerical analysis of the chain of extended precision

Similar Questions

• What is the analysis of the chain model for "fits all"?

  Hello

  Using scan chain for a while, I know that %s corresponds only to chain up to white space. And I also thought % [^] matches everything, including spaces. But it turns out that it stops at the closing brace square.

  So what's the real scan pattern match everything including spaces?

  Want you that the Scan of chain at the end on?  Or are you typing just the rest of the chain?  If this is your scenario, then simply use the output 'remaining chain.  It might be useful to give a complete example of a normal input string and all WHAT you want as output.

• ANALYSIS OF the CHAIN fails with empty quoted strings

  I'm scanning a long text with the STRING SCAN line.

  

  "[My problem in the first place of this part: " [^] "]"

  The string I'm scanning a quotes in it - I want to extract the string in quotes as a single item.

  I can't use %s because the string can have spaces that it contains.

  The format string works fine except if the quoted string is empty ("").

  "[I interpret " [^] "]" a number of things that are not a QUOTE, QUOTE, QUOTES.

  Apparently, 'any number' does not include zero, as it fails (error 85: data not matching format) when the quotes are empty.

  What Miss me?

  This confusion arises as well in RegExes, but you hit on the answer: in the Simpsons "Zero is one percent", but in the analysis of String Nothing is not something.  You asked to match something that's not a quote, and there is nothing here that is not a quote, so it complains.

  In this situation if I really wanted to keep the convenience of analysis of string I would generally use Search & Replace to replace "" with "\00" before scan and then process a string that only contains null as empty.

• Analysis of the chain: entry Boolean

  Hello to you all!

  I noticed a strange (for me) behavior of string function analysis.

  If I want to use it to read the string, but instead writing the format string (%s %d %b (...)) I wish to state the type of connection type corresponding to the entry.

  And when it comes to reading or digital - channels there is no problem, but with the Boolean values for a reason, the function does not interpret 0 as False value and 1 as true. If I connect the string with the %b Format - it works fine...

  Here's the snipped:

  

  Is this a bug or a well known?

  PS: my apologies for my English - this is my 2nd language...

  0 and 1 are the binary representation of the Boolean type. If you open the help file on a Boolean control, you will see that the value of type boolean are TRUE, FALSE. If your string contains TRUE, FALSE, T, F, True, False for examples, he recognizes as a Boolean value.

  In your case if you do not use a format string, you can use a constant U8 and not equal to zero use.

  

  Ben64

• analysis of the chain of the serial port to retrieve data

  Hi all

  It is a problem of beginner. I have two sensors sending data to a same wireless serial port. In order to distinguish which is which. I coded each sensor to send data with a unique address UoL 000 X, then followed by two values, I want to read. These two values are in the float with format fixed impression (decimal fixed after the third bit). The format string of the first sensor should looks like UoL 0001 123,45678 876.54321. I use the Scan of the String function, unfortunately, it doesn't work that way. Could you please check the VI for me? Or a better solution for this application. Thank you very much.

  S.G

  It does not because what you have set is not different from what you have joined earlier.  Have you tried something?

  See this amendment attached to your VI.  The format strings work with the examples you gave, and sends the data to the appropriate indicator.

  Also, I cleaned up the mess that the inner loop where you were waiting for 1 or more bytes.  Which means most of the time that you would probably get an incomplete message.

• Analysis of the chain, insert. in a string

  HelloW LV'ers

  Simplified example

  I have a string with 3 digits for example of entry of 789

  I would like to use scan string to place a "." between the numbers.

  entry exit 789 7.8.9

  How to configure the scan station to do this?

  Thank you

  Of course, a general solution must be scalable. I don't think we can assume that there are always exactly three numbers, because it has been given only as a "simplified example.

  Here's a solution that works for any length string (containing numbers decimal only)

  

  (of course you must ensure that the entry is healthy and that it does not contain any characters illegal. not shown, but look at lexical class)

• analysis of the chain

  Hello

  I want to display values that I'm playing an instrument via a serial port to a xy graph based on the real time... But I do not know why it shows only the last value not drawing the entire curve.

  

  the program is attached

  any suggestions?

  It seems that your problem is your line at the moment.  You are dividing by an array with 1 element.  Therefore, you will have only 1 value of X.  Instead, divide by a digital scaler and this divider will apply to each element of the array.

  But a better way is to calculate once per iteration, only (instead of the item once to always each iteration).

  

• Is there a way to parse a string containing % (percentage symbols) using the function 'analysis of the chain?

  I am communication in series with a mirror device and the syntax of the input string contains this text: "% hr ="

  I was not able to find a way to say to the function that the percentage here is not a format specifier. Is it possible, or should I just try to use a different function?

  Thank you.

  Use %% in your format string for what he knows to use the percent literally.  So % RH = %f

  

  EDIT: Darin has one here in front of me.  It seems to be-% and % both work.

• analysis of the chain does not recognize the AM/PM indicator

  Hello

  I'm using Labview 8.6. I want to parse a time string, with an AM/PM indicator on the inside, but the format of time code 'string scan. '

  "%<%d/%m/%Y % I: % h: %p %s > T ' does not recognize the AM/PM indicator. The other strings contains the AM/PM indicator.

  Best regards,

  Friedrich Vollink.

  Is the solution:

  define the symbols AM and PM in the control linguistiques\Options settings\time Pffffffffffffffffffffffffffff

  regards,

  Friedrich Völlink

• The analysis of the non-numeric characters in a string

  Hello

  I am communicating a robot to LabVIEW (2013) via TCP/IP and sockets. The robot is the server, and LV is the customer.

  I start with the target data in this format (in a string):

  "[0 ~ 100 ~ 0] ~ [0.96593 ~-0.25882 ~ 0 ~ 0] ~ [1 ~ 0 ~ 0 ~ 0] ~ [150 ~ 50]."

  [X, Y, Z], [Q1, Q2, Q3, Q4], [C1, C4, C6, Cx], [TCPVel, OrientVel] except replacement ',' (comma) with a ' ~ ' (tilde) because I load the target data in a spreadsheet which is a comma-delimited file.

  In LV, I take this string, the analysis of the chain and split individual items. I then pulled the singular elements as unique, 32-bit of real numbers. I take each one and convert them individually to a string, concatenate them and send them to the robot. The robot decompresses these raw bytes individually and converts them to a target of robot (position in space).

  I train (BT) check if the user has sent a bad character (non-digital) in the target data. Example of this is:

  [- 50 ~-150 ~ 0] ~ [0.96593 ~-0 ] [B2has5D882 ~ 0 ~ 0] ~ [1 ~-1 ~ 0 ~ 0] ~ [150 ~ 50]

  Now in BT, when I'm scanning the chain, these bad character becomes the entire element to zero and everything else then to zero as well. See attachment for example screen similar.

  My question is, my VI, I can analyze all non-numeric characters (that are inside the parentheses and characters that are NOT a ' ~ ' (tilde))? In this way, I can always get this item numbers and do not have this element or other items turn to zero?

  Thanks in advance for any help!

  Sorry for the question of the test

  SM

  
  

• Analysis of the error in normal mode string

  Hi all

  Suddenly, my analysis of the chain has stopped working and started giving me this error. The read string ends up being something like 2.86E - 4 or similar. When I run mode highlighted everything works fine and it interprets the number very well but when he's not in highlight mode it returns an error. Not sure why since it is just a number to convert. Any help? I have attached the error and the highlight mode version. Thank you!

  First guess: synchronization problem. Especially since you said it works in highlight mode. Specifically, when you run culminating point mode you expect probably not long enough before trying to read, and the loop will immediately detect any byte on serial port. This delay function there will not guarantee a delay of 1 second between writing and reading. There is no dependence on the data - a rookie mistake. Use an image sequence or time to late VI to have clusters of error wiring through establishing the data dependence.

• The good examples of the construction and analysis of the data in bytes?

  Hi all

  Very soon, I'll have to find a way to build messages to bytes to send to a serial port and a serial port to receive and review to the basis of events out of...

  However, before I delve into the complexities of the serial port communication and VISA, etc... I would just like to see some examples of working mainly with data of bytes.

  I found how to get a digital constant the byte value... the binary representations signed and unsigned, etc..

  However, if I could find a simple example or tutorial just to see how to assemble the byte-code... and how to analyze it, it would prove invaluable for me to study.  I've never really worked at the byte level / binary front... and a few examples with LV would be very practical.

  Anyone know of any good links out there something like this?

  I'll eventually be sending 5 bytes out I need to build... and will receive 9 bytes in, each of which I need to parse out and respond...

  Links or information GREATLY appreciated.  I'm pretty decent analysis of the chains, real expressions, etc... but never worked with the construction and analysis of the data in bytes.

  Thank you in advance,

  Cayenne

  If you are comfortable with binary data, you can use the Boolean charts. Look at the number of table Boolean and array Boolean functions numbers. Instead of masking with an AND, you can easy to use array index to check a bit particular.

• Possible bug: save the table with double and extended precision to the worksheet

  If one concatenates an array of double-precision and an array of precision extended with the 'build' vi table, then recorded using 'Write in a spreadsheet file' vi any digits to the right of the decimal are reset to zero in the saved file. Regardless of the entry of signifier of format (for example %.10f) to the vi 'Write in a spreadsheet file'.

  I'm on Vista Ultimate 32 bit and labview 9.0

  This is a possible bug that is easily circumvented by the conversion of a type before you incorporate arrar in a worksheet. Nevertheless, it's a bug and it cost me some time.

  Hi JL,.

  No, this is not a bug - it's a feature

  Well, if you'd look closer you would recognize the 'save to spreadsheet' as polymorphic VI. As this polymorphic VI does not support the EXTENSION numbers internally (it only supports DBL, I64, and String) LabVIEW selects the instance with more precision: I64 (I64 a 64 bits of precision, DBL that 53...). Your options are:

  -the value of the instance to use as the DBL (by right click and "Select type... »)

  -make a copy of this VI, save it under a different name and make support number of POST (not rework the polymorphic VI like you would break compatibility with other facilities of LV or future revisions)

• floating point No. the chain with the same precision

  I use "format string" to convert floating point No. to a string. Most of the numbers have a single decimal digit, so I use '%^0.1f' in the format in the connection string. But for our whole. like 150, it gets converted to 150,0. I want to avoid this, such that the chain looks exactly like the No.... What should I change?

  Use %#0.1f as your format string.

  Read the help file on the format codes.  The sign # told him to truncate the zeros.

• How to stay in control of the chain box, at the opening of the vi

  Hello

  I am writing a code which requires me to analyze a code. But to do this I should click in a string control box then analyze, so that the alphanumeric code can appear in this area.

  I have this default value. As in, I want the cursor within the control of the chain box as soon as I run the vi. So that I can directly runs the analysis from the vi and the code is entered in this field.

  Also, I have a pop up in the middle of my code. I close the popup by pressing any key. After that, I want the cursor to return to the same chain of control, as described above.

  Please let me know what is the best way to do it.

  Thank you

  Mr. Miagi

  Set update of key control string true property using the property node when you want to set the cursor to the control of the chain.