Read from csv file and graph at certain interval

Hi,
I've been trying all day to modify a labView program so it reads in data from my csv file to graph temperatures from 4 ovens. The temperatures are logged in the csv file at 3s intervals and i wish to display them on 4 graphs. I've written a vi (or modified one i should say) to take in a temperature value from a numeric control. Im just having extreme difficulty with the reading part.
If someone can help me it would be greatly appreciated.
Best regards,
Dawn
Attachments:
Oven temps.csv ‏2 KB
Oven_level_meas.vi ‏58 KB

Hi there,
I have a similar problem here. I see your point that you should read the file at once but I don't seem to be able to manage it. Shouldn't you use some kind of
a buffer to achieve this? Let me tell you what I am trying to do: I have a csv file with several columns that I want to display in several waveform charts. Each column is a wavechart. I should be able to change the speed at which the data is displayed. I am able to do this because I change the wait until (ms) in the for loop. However the application is too slow. I think because I open the csv file in the for loop and display it while I am reading it. I have tried to put it outside the for loop but this doesn't work. I think I need some kind of a buffer in which the data is stored after reading it. And then this buffer should be used in the for loop. I have looked at the producer-consumer structure but I dont fully understand it as I am not that experienced with labview. Any help or changes to my VI would be appreciated. I have attached the VI and the file with meaningless data I am using for testing.
Thanks
Attachments:
read_data_file_dynamically.vi ‏39 KB
test.CSV ‏332 KB

Similar Messages

Read from csv file and plot particular columns

Hello,
I`m a new user of Labview and here it comes...my first major problem.
Maybe this has been discussed before. I’ve made a search to solve my problem first but I couldn`t find anything helpful so I `ve decided to post a new message.
So here is my problem:
I`m working in a small semiconductor lab where different types of nitrides are grown using proprietary reactor. The goal is to read the collected csv files from each growth in Labview and plot the acquired data in appropriate graphs.
I have a bunch of csv files and I have to make a Labview program to read them.
The first part of my project I`ve decided to be displaying the csv file (growth log file) under labview (which I think works fine).
The second one is to be able to plot particular columns from the recipe in graphs in Labview (that one actually gives me a lot of trouble):
1. Timestamp vs Temperature /columns B and D/
2. Timestamp vs Gas flow /columns L to S/
3. Timestamp vs Pressure /columns E,K,T,U,V/
I`ve got one more problem. How can I convert the Timestamp shown in csv file to human readable date in labview? This actually is a big problem, because the timestamp is my x axis and I want to know at what time a particular process took place and I also want to be able to see the converted timestamp when displaying csv file at first. I`ve read a lot about time stamping in excel and timestamp in labview but I`m still confused how to convert it in my case.
I don`t have problems displaying csv file under Labview. My problems are with the timestamp and the graphs.
Sorry for my awful English. I hope you can understand my problems since English is not my mother language.
Please find the attached files.
If you have any ideas or suggestions I`ll be more than happy to discuss them.
Thank you in advance.
Have a nice day!
Attachments:
growth log.csv ‏298 KB
Read from growth log.vi ‏33 KB

Hello again,
I`m having problems with converting the first column in the attached above file Growth Log.csv.
I have a code converting xl timestamp to time and using Index Array traying to grab a particular column out of it but the attached file is written in strings so I guess I have to redo it in array but I don`t know how.Would you help me with this one?
Attachments:
Xl Timestamp to Time.vi ‏21 KB

Read a CSV file and dynamically generate the insert

I have a requirement where there are multiple csv's which needs to be exported to a sql table. So far, I am able to read the csv file and generate the insert statement dynamically for selected columns however, the insert statement when passed as a parameter
to the $cmd.CommandText
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How to evaluate the string in powershell
Import-Csv -Path $FileName.FullName | % {
# Insert statement.
$insert = "INSERT INTO $Tablename ($ReqColumns) Values ('"
$valCols='';
$DataCols='';
$lists = $ReqColumns.split(",");
foreach($l in $lists)
$valCols= $valCols + '$($_.'+$l+')'','''
#Generate the values statement
$DataCols=($DataCols+$valCols+')').replace(",')","");
$insertStr =@("INSERT INTO $Tablename ($ReqColumns) Values ('$($DataCols))")
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#Execute Query
$cmd.ExecuteNonQuery() | Out-Null
jyeragi

Hi Jyeragi,
To convert the data to the SQL table format, please try this function out-sql:
out-sql Powershell function - export pipeline contents to a new SQL Server table
If I have any misunderstanding, please let me know.
If you have any feedback on our support, please click here.
Best Regards,
Anna
TechNet Community Support

Read a csv file and read the fiscal yr in the 4th pos?

Hello ABAP Experts,
how to write a code for read a csv file and read the fiscal year in the 4th position.
any suggestions or code highly appreciated.
Thanks,
BWer

Hi Bwer,
Declare table itab with the required fields...
Use GUI UPLOAD to get the contents of the file (say abc.csv) in case if the file is on the presentation server...
CALL FUNCTION 'GUI_DOWNLOAD'
EXPORTING
    filename                        = 'c:\abc.csv'
   FILETYPE                        = 'ASC'
    WRITE_FIELD_SEPARATOR           = 'X'
tables
    data_tab                        = itab
EXCEPTIONS
   FILE_WRITE_ERROR                = 1
   NO_BATCH                        = 2
   OTHERS                          = 22
IF sy-subrc <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
         WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
Use OPEN DATASET in case if the file is on the application server..
After that USE SPLIT command at comma to get the contents of the 4th field...
Regards,
Tanveer.
<b>Please mark helpful answers</b>

How to read from excel file and write it using implicit jsp out object

our code is as below:Please give us proper solution.
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} catch (IOException ioe) { ioe.printStackTrace(System.out); }
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out.close();
in.close();
%>

If you want to copy files as fast as possible, without processing them (as the DOS "copy" or the Unix "cp" command), you can try the java.nio.channels package.
import java.nio.*;
import java.nio.channels.*;
import java.io.*;
import java.util.*;
import java.text.*;
class Kopy {
     * @param args [0] = source filename
     *        args [1] = destination filename
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        FileInputStream fis = new FileInputStream (in);
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Scenario to read from txt-file and create a sales order

Hi,
i have started creating a scenario to read from an txt-file and to create a sales order.
When i activate my scenario, i get the following message :
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When i look into the detailed xml-file i see that all the records are read from the file, but there is no next step to be treated.
Has somebody any idea how this come ?
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<col>0000087077</col>
<col>201110041205</col>
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<col>8710624300012</col>
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<col>8710624300012</col>
<col>8714252008609</col>
<col>8710624300012</col>
<col>N</col>
<col>N</col>
<col>N</col>
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<col>OL</col>
<col>1</col>
<col>8711715844378</col>
<col>20</col>
</row>-<row>
<col>OL</col>
<col>2</col>
<col>8711715844392</col>
<col>60</col>
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<col>OL</col>
<col>16</col>
<col>8710251791092</col>
<col>280</col>
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This is my final atom :
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<Msg xmlns="urn:com.sap.b1i.vplatform:entity">
<xsl:copy-of select="/vpf:Msg/@*"></xsl:copy-of>
<xsl:copy-of select="/vpf:Msg/vpf:Header"></xsl:copy-of>
<Body>
<xsl:copy-of select="/vpf:Msg/vpf:Body/*"></xsl:copy-of>
<Payload Role="R" id="{$atom}">
<xsl:call-template name="transform"></xsl:call-template>
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</Body>
</Msg>
</xsl:template><xsl:template name="transform">
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<BOM>
<BO>
<AdmInfo>
<Object>17</Object>
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</AdmInfo>
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Mike,
you were right, you may not specify the extension of a file.
Another thing i detected is that the loop of my data start with the index 1 instead of 0 !!!
In this scenario, i have to read all the lines of the file and each time i should do a SQL-query,
so that i can use the result to build my sales document.
Do you know if it this is possible or have you any idea how to do this ?
thx,
Mario

Reading a csv file and bind to a data grid

hi. doing a school project and been searching. the application reads a csv file from c:\stocklist.csv, and then this in a button called btnLoadData, and now need to read in a data control called DmgDisplayData. do i put the code in the button, or in the
data grid. been searching, but cannot seem to find any thing. so, where do i put the code, in the data control, and does any one have an example code how to read into the data fields. also need to have one field, able to edit, the other three or four fields,
read only. can any one help me out. never covered this in the subject, but did do file streams a few years ago in vb, but usin g c#,a dn the help in visual studio, not that helpful, with a blind person using a screen reader, jaws for windows from http://www.freedomscientific.com,
and using visual studio 2013 community edition. can any one help me out, been searching and trawling about 15 to 20 pages so far, and did try a couple of sites, but could not find, any help. thanks. the application is to read a csv file from a button, and
load into a data grid, then have a message box, saying file load successful, then have one field, order on as edit, but the other fields, read only, so do i need the navigator buttons, for next, back, previous, etc, and how do i code that as well. not to do
it for me, want to learn, but maybe some sample code, did do navgiator controls, years ago for a vb project, but need the c # example for that, thanks. then you have a button, Save data, that saves the csv file in the data grid. so can google for that. then
have a toolbar, with a button saying, Sort Items, a tool strip, and when you click on that button, you have a drop down list, of three items, then a sort button, which will then sort the array in the data grid. so, do i need another form, or just do the combo
box as an invisible control, then just refrence, that in the toolbar. so need to use th file class and an array, learnt about single and multi arrays. any ideas. thanks.
http://startrekcafe.stevesdomain.net http://groups.yahoo.com/groups/JawsOz

Hi Marvin,
-->where do i put this, in the data grid click event. or in the form load event. thanks.
You could use this code after you initialize the DataGridView. you could put it in the form load event.
-->what about how get the tool bar and the combo box and another button, then sort from the combo box on the array for the collumns, for to set focus to the first read collumn for the data grid. how do i do that, close the parent form, and have another
form on the toolbar.
Since this is another issue of this thread, I would recommend you posting it with
another thread. We will focus on that thread to help you. Thanks for your
understanding.
BTW, Before you asking questions, I suggest you could learn to make it by yourself. You could begin to learn winforms in MSDN articles:
https://msdn.microsoft.com/en-us/library/dd30h2yb%28v=vs.110%29.aspx?f=255&MSPPError=-2147217396. Or Google it, you will get many answers. In that way, you will learn more from the questions.
Best regards,
Youjun Tang
We are trying to better understand customer views on social support experience, so your participation in this interview project would be greatly appreciated if you have time. Thanks for helping make community forums a great place.
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Read two CSV files and remove the duplicate values within them.

Hi,
I want to read two CSV files(which contains more than 100 rows and 100 columns) and remove the duplicate values within that two files and merge all the unique values and display it as a single file.
Can anyone help me out.
Thanks in advance.

kirthi wrote:
Can you help me....Yeah, I've just finished... Here's a skeleton of my solution.
The first thing I think you should do is write a line-parser which splits your input data up into fields, and test it.
Then fill out the below parse method, and test it with that debugPrint method.
Then go to work on the print method.
I can help a bit along the way, but if you want to do this then you have to do it yourself. I'm not going to do it for you.
Cheers. Keith.
package forums.kirthi;
import java.util.*;
import java.io.PrintStream;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import krc.utilz.io.ParseException;
import krc.utilz.io.Filez.LineParser;
import krc.utilz.io.Filez.CsvLineParser;
public class DistinctColumnValuesFromCsvFiles
public static void main(String[] args) {
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private static Map<String,Set<String>> parse(String filename) throws IOException, ParseException {
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    for ( Map.Entry<String,Set<String>> entry : data.entrySet() ) {
      System.out.println("DEBUG: "+entry.getKey()+" "+Arrays.toString(entry.getValue().toArray(new String[0])));
private static void print(Map<String,Set<String>> data) {
    // 1. get the column names from the table.
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Automator: Create new folders from .csv file and put images inside.

I have a challenging Automator task to achieve. I need to
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Both the csv and img files would be in the same folder. I have the script to create a set of folders from a csv list just can't complete the moving of files based on the contents of column B.
SUMMARY: I have a folder containing several images img_0001, img_0002, img_0003 etc. and a csv file that contains columnA a series of names and column B a series of jpg image numbers. I need to have a script that will create folders labeled whatever name is in column A (see the script below. it works great!) then move the images from column B to the folders generated from column A.
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tell application "Finder"
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Thanks for any help that may come my way.

This should work
(assumes a true "," seperated file with only two items per line, i.e.: Test,Test.jpg):
The Run Shell Script Action is:
cd "${1%/*}"
while read line
do
     FolderName=${line%,*}
     ImageName=${line#*,}
     mkdir "$FolderName"
     mv "$ImageName" "$FolderName"
done < "$1"

Reading a CSV file and producing an array of objects

Hi everybody,
I am writing an application which will read a cvs file and produce an array of objects.
Can any body help me to solve this problem?
Thanks
Finny

Hello,
Have you tried this link?
http://ostermiller.org/utils/CSV.html

Read from .txt file and output the content as two arrays

I am using the contoured move to control the x-y stage. The trajectory datas for x and y axis are generated using my interpolation program and it is stored in a .txt file as two columns. What I want to do is read .txt file and output the content of this file as two arrays. Is there anyone has any ideas? Thanks, the .txt file is attached.
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R.75.txt ‏172 KB

Hi Awen,
This is quite easy to do, you can merely use the "read from spreadsheet file" function to get a 2D array (2 columns and n rows) and then use the index array function to get whatever row/colums you want..
Hope the attached VI helps you
When my feet touch the ground each morning the devil thinks "bloody hell... He's up again!"
Attachments:
read sprdsheet file.vi ‏27 KB

"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

How to generate graphs from csv file and show on remote clients?

Hi,
I have set of csv files. Each file has 104 parameters. From these parameters different graphs have to be generated and displayed to remote clients thru tomcat.
Can anyone tell me how to do that?
cheers,
its reeju

it's very easy to load the CSV into java objects. Once you have done that why not use the Java2D API to draw your graphs and then use the Sun JPG encoder tools to write out a jpg stream back to the browser (you will need to set the content type for jpg).

Read from .csv file at startup

Hi, I am making my first app and I need to read data from a csv file into a list. I first created this functionality on a console application, but now when I try to use the same code it does not work.
class FoodDataBase {
private List<Food> foodDataBase = new List<Food>();
private string locationOfCSVFile = "C:\\Egen Programmering\\LivsmedelsDatabas\\LivsmedelsDatabas\\LivsmedelsDatabas.csv";
public FoodDataBase() {
PopulateFoodDataBase();
private bool PopulateFoodDataBase() {
// connect reader to the CSV file
var reader = new StreamReader(File.OpenRead(@locationOfCSVFile));
if (reader == null) {
return false;
But I get an error message saying "The name 'File' does not exist in the current context". I have googled around a bit but can´t find an easy way to do it. Is there not any good way of doing this in WinRT? Should I convert my csv file to something
else?

Hi PontusL,
As I can see from your code, you are trying to read a file from a forbidden place, see this for more information:
File access and permissions.
--James
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How to read a CSV file and Insert data into an Oracle Table

Hi All,
I have a Clob file as a in parameter in my PROC. . File is comma separated.need procedure that would parse this CLOB variable and populate in oracle table .
Please let me some suggestions on this.
Thanks,
Chandra R

jeneesh wrote:
And, please don't "hijack" 5 year old thread..Better start a new one..I've just split it off to a thread of it's own. ;)
@OP,
I have a Clob file as a in parameter in my PROC. . File is comma separated.need procedure that would parse this CLOB variable and populate in oracle table .You don't have a "clob file" as there's no such thing. CLOB is a datatype for storing large character based objects. A file is something on the operating system's filesystem.
So, why have you stored comma seperated data in a CLOB?
Where did this data come from? If it came from a file, why didn't you use SQL*Loader or, even better, External Tables to read and parse the data into structured format when populating the database with it?
If you really do have to parse a CLOB of data to pull out the comma seperated values, then you're going to have to write something yourself to do that, reading "lines" by looking for the newline character(s), and then breaking up the "lines" into the component data by looking for commas within it, using normal string functions such as INSTR and SUBSTR or, if necessary, REGEXP_INSTR and REGEXP_SUBSTR. If you have string data that contains commas but uses double quotes around the string, then you'll also have the added complexity of ignoring commas within such string data.
Like I say... it's much easier with SQL*Loader of External Tables as these are designed to parse such CSV type data.

Read from csv file and graph at certain interval

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