Binary file reading

Dear All,
I have Binary file. I want to read Bytes based on Patterns and each channel value (Byte values -- > Float conversion) and storing it into Index array.
Please check the attachment for pattren format.
Here, the biggest problem is we will get only pattern style, Based on pattern the data is already stored in Binary file just we need to read it means we need to set the Timestamp based on this.
Please give me some idea to read this kind of pattern files.
BR,
Guru
Munna
Attachments:
Data Reading.xlsx ‏15 KB
Data Reading.xlsx ‏15 KB

Hi Munna,
that pattern is quite hard to understand. It seems there is some information missing…
In your pattern table the data size for e.g. ch1 is given as "1 byte", but in your time schedule you use two bytes for ch1. How are those "ch start position bytes" to be identified?
Byte values -- > Float conversion
How do you want to convert those bytes to Float (SGL or DBL)?
storing it into Index array
What is an "index array"?
It seems you have to create a table from your pattern which identifies the bytes in the file. That seems to be the trickiest part as in your pattern#2 example you already have made a mistake (for ch4 there is no marking at timestamp 70ms)…
Best regards,
GerdW
CLAD, using 2009SP1 + LV2011SP1 + LV2014SP1 on WinXP+Win7+cRIO
Kudos are welcome

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Binary File Read

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Go to Solution.
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What program created this binary file?
If you can figure out how the file was created, then you can figure out how to read it.
We can't help because all you've shown are some bytes and say that some are right and some are wrong. What is the "raw one" you are referring to? What do you expect it to look like?
Message Edited by Ravens Fan on 01-26-2010 11:15 PM

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i want to read a binary file with some offset ..not in bytes... offset in bits..my data is a single bit data stream size of 1GB ,after skipping particular bit offset i want to read the data in byte order..
Indrajit
| [email protected] | [email protected] .

hi , Gerd W
i am not able to follow your answer.... here with i attached a file to describe my query more clearly. Actually two channels of 1 bit data stream stored in two different files ,and the file size will be more than 10 GB.
i want to delay the channel B by 3 bits and i want to perform bitwise operation between channel A and shifted version of channel B..till the end of the data..
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Indrajit
| [email protected] | [email protected] .
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bitwsie.png ‏16 KB
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Hi,
These threads regarding reading of binary files was recently discussed in this forum
You might find some answers for your query
http://forums.ni.com/ni/board/message?board.id=170&message.id=99016&requireLogin=False
and
http://forums.ni.com/ni/board/message?board.id=170&message.id=153565&requireLogin=False
Regards
Dev

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Hello All,
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Chart write_Read.zip ‏140 KB

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Hi there,
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pfrc wrote:
Hi there,
I'm trying to read a partially binary file with the following structure: The first three lines of the file are regular strings (one can see them correctly when opening the file in a text editor), the rest of the file's contents are integers in their binary form (one cannot see them correctly when opening the file in a text editor).
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Large binary file reading

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Blob for binary file, read/write problems

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Thanks in advance.
Chris.

myOracleCommand.CommandText = "insert into blob_content(id, blob_column) values 2, empty_blob())";
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This looks wrong, you shouldn't be using ExecuteReader unless you expect to get a result back. Try using ExecuteNonQuery to do the insert.

Binary File reading in Java

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FileInputStream

How to read a binary file written in LabVIEW 6.1 using VB ?

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sle,
In the future, please create a new thread for unrelated questions. To answer your question, you can use "Split Number" from the Data Manipulation palette.
Message Edited by jasonhill on 03-14-2006 03:46 PM
Attachments:
split number.PNG ‏2 KB

Binary File IO DLL Problem

Hiii
I have developed one Binary file Read/Write Vi.. and then i have convert that vi in to DLL......
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Attachments:
Binary Read#Write DLL.vi ‏18 KB
Binary File Read#Write.vi ‏24 KB
TEST.vi.vi ‏31 KB

hi there
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Hi Everyone,
I see multiple ways of tackling this but I'm looking for the fastest approach as my data set is very large....
The issue:
I have a binary data file holding 2D data.
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Scanning byte by byte would be very slow.
any suggesitons?
Solved!
Go to Solution.

Taking wrote:
Your sequence structures are unnecessary.
I'd bet on Join Number being faster than any string functions.
What sort of mechanism are you going to use for column definitions?
Do you care if 8 bit datatypes get upcast to 16 bit?
Agreed, the sequence structures only present to aid illustration.
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How to open and read binary files?

How do I open and read Binary files?

Did you look on The Unarchiver's web site where it has a link to older versions? http://theunarchiver.googlecode.com/files/TheUnarchiver3.2_legacy.zip
The best thing to do is ask your friends what programs they used to produce these files, or at least what format files they are producing. Otherwise it's like being shown a car and given a bundle of 200 keys with no idea to which one to use, or even if any of them work with that car.
Using The Unarchiver will likely not do anything because it too will not know what format files are involved, and they may not even been in an archived format. If they sent you a Word file without telling you (a favorite of Windows users to do -- it drives me crazy when they could have just sent them in plain text), The Unarchiver won't open them. If it's a picture file then using Hexedit will just show you a bunch of unintelligible stuff as shown in an earlier post, though you may see a line of text providing a hint.
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Binary file reading

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