Open *.MAT file
Hello,
For some reason I cannot open a matlab file. The file has been ftp'd and is called "Failed MAT file.zip"
I can open other .mat files just not this particular one. I am using DIadem 2012 SP1.
When I load the data into the data portal it says loading the file "file name" has failed for all the loading methods (DataPlugin) linked to this file type. No DataPlugin assigned for this type.
When I assign the plugin to open MatLab file I get another error stating it cannot open the file with the loader "MatLab"
Any ideas?
Thanks
Tim
Hi Tim,
I downloaded your *.mat file and had the same error message you report. The DataPlugin does appear to correctly import 239 of the channels from that file. Do you know if the "EngTrqStatic1" is the only one it fails on, or was that channel supposed to be empty? I'll send your file on to R&D for them to see what's happening during the import. There are some *.mat file data types that the DataPlugin can't support (like custom structs), so it's possible we won't be able to help, but let's see.
Brad Turpin
DIAdem Product Support Engineer
National Instruments
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How to open a .MAT file in LABVIEW
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I currently have a .MAT image file which I would like to open in LABVIEW to apply some image filters. However, I am unsure as to how to open the .MAT file in LABVIEW. Ideally I would like to be able to open the .MAT file without using matlab, and it seems the only way to accomplish this task is through the mathscript node. I have attached an example of the image im trying to open, as well as the LABVIEW program which I would like to use on the image. Thanks for the feedback! =]
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1) Do you have a choice in the format you export your data from MATLAB?
"ASCII Format
Complete the following steps if you want to import or export data between LabVIEW and the MATLAB® environment, the process is straightforward as long as you are using ASCII format.
From the MATLAB® environment to LabVIEW
To save a vector or a matrix Xin ASCII format with tab delimiter, enter the following in the command window or m-script file in the MATLAB® environment:
>>SAVE filename X -ascii -double -tabs
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Import the file into LabVIEW using the Read From Spreadsheet File VI located on the Programming»File I/O palette.
2) Have you tried using the mathscript node? Did you get any errors?
"Binary Format
Complete the following steps if you want to import or export data between LabVIEW and MATLAB®.
From the MATLAB® environment to LabVIEW
To read a .mat file in LabVIEW would require a VI to parse the file. This may be easier if each variable is saved to a separate file.
" -- this was done here, no ideas if it still works,
I want to read a Matlab MAT file into labview
Hope this helps, James
Kind Regards
James Hillman
Applications Engineer 2008 to 2009 National Instruments UK & Ireland
Loughborough University UK - 2006 to 2011
Remember Kudos those who help! -
Hi,
I am new to labview and need some assistance trying to open a .mat file for further analysis (example file attached). The file formate is level 5 and I believe the data is in arrays. I do not have access to confirm the structure but have been told the layout of the data i need to access follows the following structure: MotionFile_walkaround -> Actor_50_human -> Segments -> Sacrum -> Pose.
I have successfully read the header and found that byte swapping is required. I have downloaded the Mat-File IO library but have had no success in reading the actual data set beyond the header but assume this is due to my inexperience with both .mat files and labview.
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Attachments:
walkaround.zip 1527 KBHey doofus13,
When reading your .mat file, created in The MathWorks, Inc. MATLAB® software, I recommend using the MATLAB® DataPlugin found here:
MATLAB® DataPlugin
http://www.ni.com/example/29178/en/
Then, you can use the Data File Viewer function to view all of the data in your file. Any data that can be seen in the Data File Viewer can then be extracted using the Data Storage API. I looked through the file you provided and was able to view and extract the data contained in the file using the Data Storage API so it should work fine for you.
MATLAB® is a Registered Trademark of The MathWorks, Inc.
Hope this helps!
--Ryan_S. -
How to implement reading data from a mat file on a cRIO?
Hi all!
I am not even sure, this is plausible, but I'd rather ask before i start complicating. So far, I have not found any helpful info about reading in data to a RT device from a file (kind of a simulation test - the data is simulated).
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Go to Solution.Hi Luka!
MAT file support in LabVIEW is handled by DataPlugins. Here you can find the MATLAb plugin:
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And here you can find information on how to use DataPlugins to read or write files of a certain format:
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There is also an open-source project that addresses the problem, you can find it at
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Unfortunately, RT systems are not supported by DataPlugins, so fist you'll have to write a VI on the Host computer to convert your files to a usable format (I suggest TMDS for compactness and ease of use), and the work on the converted files in the cRIO VI. If you have other questions about DataPlugins or anything else, please get back to me.
Best regards:
Andrew Valko
National Instruments
Andrew Valko
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Creating .mat files with Matlab dataplugin in LabVIEW
I am trying to create a .mat file in LabVIEW using the Matlab dataplugin. It appears to create a group called "Vector" without being told to, and it also concatenates group and channel names together. I have made an example to demonstrate this behaviour. I am trying to create a group called "Group" and inside it a channel called "Channel". What I get looks like a group called "Vector" and inside it a channel called "GroupChannel". What am I doing wrong?
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Go to Solution.
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write mat example.zip 54 KBHello John
Thank you for getting in touch regarding your issue. I am an applications engineer here at National Instruments, as I understand you are using the data plugin for Matlab within LabVIEW, but as shown with your code when you label the channel or group you get an outcome which you don't expect.
I have opened and had a look at your code and can see where the issue is arising. The functions you are using are normally used with TDM files, .MAT files are compatible but there are a few differences between the file formats, which is why you are getting the outcome we have seen. A TDM file has headers named channelgroup and channel, but Matlab does not have the channelgroup header in the file type and therefore the functions in LabVIEW merge the 2 strings to the available header.
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Best regards,
Fesmi
Solved!
Go to Solution.The Forum is somewhat particular about the files which may be attached. Often creating a zip file works. Sometimes you can change the extension to .txt. If you change the extension, please indicate in your post what the orignal extension was.
It appears that the data in the file has a time column and an amplitude column. The LabVIEW waveform datatype is a cluster of an array of amplitudes (Y), sampling interval (dt), starting time (t0), and optional attributes. This is what the Power Spectrum VI requires as an input. The t0 values is not used so the defualt is fine. the dt value can be calculated from the difference of any two adjacent values in the time column. Since the first value is zero, the second value is equal to dt. Use the Build Waveform primitive from the Waveform palette. Expand it to show the dt element.
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HelloThank's for your helpsI hope this document is helpfulBest Regards,
Date: Sun, 22 Jun 2014 17:10:17 -0700
From: [email protected]
To: [email protected]
Subject: when i open pdf file it open all the pages but some pages give error massage (there was error processing a page,there was a problem reading this document 110) but if i open this page which give me error with google chrome it's work ? if you can help me th
when i open pdf file it open all the pages but some pages give error massage (there was error processing a page,there was a problem reading this document 110) but if i open this page which give me error with google chrome it's work ? if you can help m
created by Anoop9178 in Adobe Reader - View the full discussion
Hi,
Would it be possible for you to share the document?
Regards,
Anoop
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For more information about maintaining your forum email notifications please go to http://forums.adobe.com/thread/416458?tstart=0.thank's for reply and your help
i did the step's that you told me but i still have the same problem
i have the latest v.11.0.7
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I need to open a file, and edit part of the file based on some static text in that file. For example, lets say the text file looks something like this:
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I need a program that will open the file, and delete everything from the first 1 to the last 1, and do nothing if no 1's exist.
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import java.io.IOException;
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Secured using Domain SSL from GlobalSign.
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and choosing either options and re-entering the login credentials results in the
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This happens to all the users all different OS and browsers.
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Have tried following:
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Note: PDF files opens fine for all users.
I would immensely appreciate if anybody has got any advice/pointers/suggestions. Desperately out of ideas at the moment.
regards,
Compter Sez No!Hi,
According to your description, When you try to open a Microsoft Office document from a SharePoint 2010 site in a client application, the document opens slowly and you are prompted to enter your credentials multiple times.
This issue may be because of SharePoint Web Front End (WFE) server(s) has Antivirus software installed and the exceptions are not set correctly.
I recommend to remove the antivirus software or set the correct permissions for the antivirus software to resolve the issue.
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KB943620:
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KB952167:
Certain folders may have to be excluded from antivirus scanning when you use a file-level antivirus program in SharePoint.
KB943556:
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