Reading in a binary file and displaying an array correctly

I am teaching myself Labview 7.1 and what I am trying to do is read in a text file of binary digits 10011001, 11011101 etc and then output these to a series of leds (boolean array) as well as to another array to display what was read in. I can get this to happen when I format the text file as 1,0,0,1,1,0,0,1 but then the array is 1 column by 8 rows (is this a 1by8 array) I want to read this data in as 10011001 displayed on 1 row and then the next row of the array to be 11011101, it displays 11111111 if I go above 3 digits, I know this is just a problem with binary versus decimal numbers, how can I format the input file so it is read in as 8-bit binary?
Thank you in advance,
Dan Ziehm

Read the text file as string, then pass it through "spreadsheet string to array" with "," as delimiter, %b as format and an U8 array as type. I made a quick demo, see attached code image.
LabVIEW Champion . Do more with less code and in less time .
Attachments:
binaries.gif ‏45 KB

Similar Messages

Reading from a text file and displaying the contents with in a frame

Hi All,
I am trying to read some data from a text file and display it on a AWT Frame. The contents of the text file are as follows:
pcode1,pname1,price1,sname1,
pcode2,pname2,price2,sname1,
I am writing a method to read the contents from a text file and store them into a string by using FileInputStream and InputStreamReader.
Now I am dividing the string(which has the contents of the text file) into tokens using the StringTokenizer class. The method is as show below
void ReadTextFile()
                    FileInputStream fis=new FileInputStream(new File("nieman.txt"));
                     InputStreamReader isr=new InputStreamReader(fis);
                     char[] buf=new char[1024];
                     isr.read(buf,0,1024);
                     fstr=new String(buf);
                     String Tokenizer st=new StringTokenizer(fstr,",");
                     while(st.hasMoreTokens())
                                      pcode1=st.nextToken();
                           pname1=st.nextToken();
          price1=st.nextToken();
                          sname1=st.nextToken();
     } //close of while loop
                } //close of methodHere goes my problem: I am unable to display the values of pcode1,pname1,price1,sname1 when I am trying to access them from outside the ReadTextFile method as they are storing "null" values . I want to create a persistent string variable so that I can access the contents of the string variable from anywhere with in the java file. Please provide your comments for this problem as early as possible.
Thanks in advance.

If pcode1,pname1,price1,sname1 are global variables, which I assume they are, then simply put the word static in front of them. That way, any class in your file can access those values by simply using this notation:
MyClassName.pcode1;
MyClassName.pname1;
MyClassName.price1;
MyClassName.sname1

Reading a Blob (CSV file) and displaying the contents

Hello Experts,
I’m currently working on a system that allows the users to upload an Excel spreadsheet (.xls) in the system. The upload page is a PL/SQL cartridge. Then I’ve written a Java servlet (using Oracle Clean Content) to convert the XLS into a CSV and store it back in the database. (it is stored in the “uploaded_files” table as a blob). I’m trying to create another procedure to read the contents of the blob and display a preview of the data on the screen (using an html table (will be done using cartridge)). After the preview, the user can choose to submit the data into the database into the “detail_records” table or simply discard everything.
Can anyone provide me any guidelines and/or code samples for reading the contents of a blob and displaying it as an html table? My data contains about 10 rows and 20 columns in the spreadsheet. I’ve been looking into using associative arrays or nested tables but I’m getting confused about how to implement them in my situation.
Any help is greatly appreciated.

BluShadow,
Thanks for your response. The reason that it is a blob is that we use the same table for uploaded files for several applications. Some files are text, some excel, some other formats. Hence the table has been set up in a generic sense.
However, in my procedure, I'm using
DBMS_LOB.createtemporary and
DBMS_LOB.converttoclob
Is there any way you could possibly provide an example of how to read the contents of the file?

How to read local large JPEG files and display into Images Tile

Hi all,
I can read the local multiple files by FLEX/AIR FileListEvent
and loader to read the large JPEG files but cannot display them
into a TileList. Since it is a number of images files, how can I
put them into a thumbnail TileList.
Please kindly advise.
Regards,
Billy

1. So I would like to know which is the {color:#3366ff}best way to load local images in ImageView{color}.I'm no expert, but is there a reason that you are using Swing to do the loading?
2. secondly, currently the system displays all images only after the completion of creating all images. {color:#3366ff}How to display images as and when they are created.{color} So that the user has a feeling that the images are loading.JavaFX Image class let you display a lightweight placeholder, and you can bind the progress to some kind of visual indicator. I don't think you can display an image that is partially loaded.
def PATHS: String[] = [
    "C://Ariel Atom//ariel-atom-1.jpg",
    "C://Ariel Atom//ariel-atom-2.jpg",
    "C://Ariel Atom//ariel-atom-3.jpg",
    "C://Ariel Atom//ariel-atom-5.jpg"
function getImage(path: String): Image {
    Image {
        url: "file:///{path}"
        backgroundLoading: true
Stage {
    title: "Image Tiles"
    width: 1024
    height: 800
    scene: Scene {
        content: [
            Tile {
                columns: 2
                tileWidth: 400
                tileHeight: 400
                content: for (i in [0..3]) {
                    ImageView {
                        image: getImage(PATHS)

Read data from text file and displaying on Webdynpro

Hi all,
I need some help. I have a text file with set of name, phonenumbers . I want to know how to display the data using Webdynpro. Could some one help me. help is appreciated and I promise to award points for right answer.
Thank you
Maruti

Hi Maruti,
just open the file and loop on the rows, here an example::
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
FileReader f = new FileReader("c:
FileName.ext");
while ((s = in.readLine()) != null)
//Here you can put the line into a WD context structure, i.e:
wdContext.currentContoEconomicoFormElement().setField(s);
}catch (Exception e) {.....}
in.close();
f.close();
For any others questions, please, let me know.
Vito

My Mac won't read cyrillic in certain files and displays instead weird characters like this: "–í–µ-Ç–µ-Ä –ø-Ä–æ–¥–∏-Ä–∞–µ-Ç –¥–æ –∫–æ-Å-Ç–µ–π." Any ideas why this might be or how I can solve it?

Yesterday I extracted the subtitles of an MKV file to try and print them. Unfortunately, when I open the .srt file with any text processor, it displays weird characters like the ones included in the title:
"–û–±—ã–≤–∞—Ç–µ–ª–∏ –ø–µ—á–∞–ª—å–Ω—ã.
–í–µ—Ç–µ—Ä –ø—Ä–æ–¥–∏—Ä–∞–µ—Ç –¥–æ –∫–æ—Å—Ç–µ–π."
I thought this had to do with it being an .srt file, but just now I encountered the same problem with an Excel file.
Any ideas why this might be or suggestions as to how to solve it?
Thanks in advance,
Mario

It looks like an encoding problem. You should try opening the file in a text editor where you can choose one of the various possible cyrillic encodings (utf-8, koi8-r, iso-8859-5, win-1251, MacCyrillic)

Parsing large xml file and display using swing

Hi all,
I want to read a large xml file and display graphically in swing as a tree structure.
I implemented it and works fine for files of 5MB size after increasing the jvm heap size (-Xmx). If the file size is larger than 5MB it throws out of memory error. I'm creating a custom datastructure from the xml and I'm using sax parsing.
After displaying the datastructure, the user could do some operation on this, like search etc.
Can any of you suggest a method, to support larger files ? What I'm looking for is create the datastructure in file system, rather than in memory.
Any other tips for memory management would be greatly appreciated
Thanks in Advance.
Nisha

Use a memory-mapped file?
http://javaalmanac.com/egs/java.nio/CreateMemMap.html

Help! Read raw Image data from a file and display on the JPanel or JFrame.

PLEASE HELP, I want to Read Binary(Raw Image)data (16 bit integer) from a file and display on the JPanel or JFrame.

Hey,
I need to do the same thing. Did you find a way to do that?
Could you sent me the code?
It's urgent, please.
My e-mail is [email protected]

I have a VI and an attched .txt data file. Now I want to read the data from the .txt file and display it as an array in the front panel. But the result is not right. Any help?

I have a VI and an attched .txt data file. Now I want to read the data from the .txt file and display it as an array in the front panel. But the result is not right. Any help?
Attachments:
try2.txt ‏2 KB
read_array.vi ‏21 KB

The problem is in the delimiters in your text file. By default, Read From Spreadsheet File.vi expects a tab delimited file. You can specify a delimiter (like a space), but Read From Spreadsheet File.vi has a problem with repeated delimiters: if you specify a single space as a delimiter and Read From Spreadsheet File.vi finds two spaces back-to-back, it stops reading that line. Your file (as I got it from your earlier post) is delimited by 4 spaces.
Here are some of your choices to fix your problem.
1. Change the source file to a tab delimited file. Your VI will then run as is.
2. Change the source file to be delimited by a single space (rather than 4), then wire a string constant containing one space to the delimiter input of Read From Spreadsheet File.vi.
3. Wire a string constant containing 4 spaces to the delimiter input of Read From Spreadsheet File.vi. Then your text file will run as is.
Depending on where your text file comes from (see more comments below), I'd vote for choice 1: a tab delimited text file. It's the most common text output of spreadsheet programs.
Comments for choices 1 and 2: Where does the text file come from? Is it automatically generated or manually generated? Will it be generated multiple times or just once? If it's manually generated or generated just once, you can use any text editor to change 4 spaces to a tab or to a single space. Note: if you want to change it to a tab delimited file, you can't enter a tab directly into a box in the search & replace dialog of many programs like notepad, but you can do a cut and paste. Before you start your search and replace (just in the text window of the editor), press tab. A tab character will be entered. Press Shift-LeftArrow (not Backspace) to highlight the tab character. Press Ctrl-X to cut the tab character. Start your search and replace (Ctrl-H in notepad in Windows 2000). Click into the Find What box. Enter four spaces. Click into the Replace With box. Press Ctrl-V to paste the tab character. And another thing: older versions of notepad don't have search and replace. Use any editor or word processor that does.

I need to read data from a text file and display it in a datagrid.how can this be done..please help

hey ppl
i have a datagrid in my form.i need to read input(fields..sort of a database) from a text file and display its contents in the datagrid.
how can this be done.. and also after every few seconds reading event should be re executed.. and that the contents of the datagrid will keep changing as per the changes in the file...
please help as this is urgent and important.. if possible please provide me with an example code as i am completely new to flex...
thanks.....

It's not possible to read from a file without using classes from the core API*. You'll have to get clarification from your instructor as to which classes are and are not allowed.
[http://java.sun.com/docs/books/tutorial/essential/io/]
*Unless you write a bunch of JNI code to replicate what the java.io classes are doing.

// Code Help need .. in Reading CSV file and display the Output.

Hi All,
I am a new Bee in code and started learning code, I have stared with Console application and need your advice and suggestion.
I want to write a code which read the input from the CSV file and display the output in console application combination of first name and lastname append with the name of the collage in village
The example of CSV file is
Firstname,LastName
Happy,Coding
Learn,C#
I want to display the output as
HappyCodingXYZCollage
LearnC#XYXCollage
The below is the code I have tried so far.
// .Reading a CSV
var reader = new StreamReader(File.OpenRead(@"D:\Users\RajaVill\Desktop\C#\input.csv"));
List<string> listA = new List<string>();
while (!reader.EndOfStream)
var line = reader.ReadLine();
string[] values = line.Split(',');
listA.Add(values[0]);
listA.Add(values[1]);
listA.Add(values[2]);
// listB.Add(values[1]);
foreach (string str in listA)
//StreamWriter writer = new StreamWriter(File.OpenWrite(@"D:\\suman.txt"));
Console.WriteLine("the value is {0}", str);
Console.ReadLine();
Kindly advice and let me know, How to read the column header of the CSV file. so I can apply my logic the display combination of firstname,lastname and name of the collage
Best Regards,
Raja Village Sync
Beginer Coder

Very simple example:
var column1 = new List<string>();
var column2 = new List<string>();
using (var rd = new StreamReader("filename.csv"))
while (!rd.EndOfStream)
var splits = rd.ReadLine().Split(';');
column1.Add(splits[0]);
column2.Add(splits[1]);
// print column1
Console.WriteLine("Column 1:");
foreach (var element in column1)
Console.WriteLine(element);
// print column2
Console.WriteLine("Column 2:");
foreach (var element in column2)
Console.WriteLine(element);
Mark as answer or vote as helpful if you find it useful | Ammar Zaied [MCP]

Can a servlet read a jsp file and display its contents?

Hi,
I would like to know if Servlets can read a Jsp file and display its contents.. Right now for our website, I am using a html file to be displayed after a successful post operation through the Servlets...
-Thanks!

I posted this in another thread.
Here's some code that reads using a URL. This doesn't work with JSPs as the server executes JSP when it connects but it's useful for other file types. Note that the filename is a URI</h1>This is <code>show.jsp</code></h1>
<hr>
<%! String file = null; %>
<%! java.io.InputStream is = null; %>
<%
file = request.getParameterValues("filename")[0];
try {
is = (new java.net.URL(file)).openStream();
} catch (java.io.IOException ioe) { out.write(file + " not found!<br>"); }
java.io.BufferedReader in = new java.io.BufferedReader(new java.io.InputStreamReader(is));
String line = "";
%>
<pre>
<%
while((line = in.readLine()) != null) {
%>
<%=line%>
<%
%>
</pre>

"Read from Binary File" and efficiency

For the first time I have tried using Read from Binary File on sizable data files, and I'm seeing some real performance problems. To prevent possible data loss, I write data as I receive them from DAQ, 10 times per second. What I write is a 2-D array of double, 1000 data points x 2-4 channels. When reading in the file, I wish I could read it as a 3-D array, all at once. That doesn't seem supported, so I repeatedly do reads of 2-D array, and use a shift register with Build Array to assemble the 3-D array that I really need. But it's incredibly slow! It seems that I can only read a few hundred of these 2-D items per second.
It also occurred to me that the Build Array being used in a shift register to keep adding on to the array, could be a quadratic-time operation depending on how it is implemented. Continually and repeatedly allocating bigger and bigger chunks of memory, and copying the growing array at every step.
So I'm looking for suggestions on how to efficiently store, efficiently read, and efficiently reassemble my data into the 3-D array that I need. Perhaps I could simplify life if I had "write raw data" and "read raw data" operations that write and read only the numbers and no metadata.then I could write the file and read it back in any size chunks I please -- and read it with other programs besides. But I don't see them in the menus.
Suggestions?
Ken
Solved!
Go to Solution.

I quote the detailed help from Read from Binary File:
data type sets the type of data the function uses to read from
the binary file. The function interprets the data starting at the current file
position to be count instances of data type.
If the type is an array, string, or cluster containing an array or string, the
function assumes that each instance of that data type contains size information.
If an instance does not include size information, the function misinterprets the
data. If LabVIEW determines that the data does not match the type, it sets data
to the default for the specified type and returns an error.
So I see how I could write data without any array metadata by turning off "prepend array or string size information", but I don't see any way to read it back in such bare form. If I did, I'd have to tell it how long an array to read, and I don't see where to do that. If I could overcome this, I could indeed read in much larger chunks.
I'll try the auto-indexing tunnel anyway. I didn't tell you the whole truth, the 3-D array is actually further sliced up based on metadata that I carry, and ends up as a 4-D array of "runs". But I can do that after the fact instead of trying to do it with shift registers as I'm reading.
Thanks,
Ken

Write string (7 chars), int16, sgl into binary file and read it in C

How to write write string (7 chars), int16, sgl, string (5 chars) into binary file and then read it in C ?
Total 18 Bytes file (binary) should be created.

Hi,
this could be done that way:
You have to make sure the strings have their correct length!
Best regards,
GerdW
CLAD, using 2009SP1 + LV2011SP1 + LV2014SP1 on WinXP+Win7+cRIO
Kudos are welcome

Code to read xml file and display that data using sax parser

Hai
My problem I have to read a xml file and display the contents of the file on console using sax parser.

here you go

Reading in a binary file and displaying an array correctly

Similar Messages

Maybe you are looking for