reading a ".mot" file

[hamed kouchebaghi]

Hello,

how can I read a .mot file in MATALB? there was a topic in "Scripting with Matlab" about "Reading in and Writing Data to File".
there was a code like this

Code: Select all

filepath = 'subject01_walk1_grf.mot';

and I typed the file path containing the .mot file and run it in MATLAB but that didn't work.
could you help me with this problem please..

thank you,
Hmaed

[Michael Asmussen]

Hi Hmaed,

In the past, I have used "dlmread" in Matlab to import the coordinate data of a .mot file and then "readtable" to extract the variable names.

I hope this is helpful

Mike

[Evan Dooley]

Hey,

I was actually working on this today. Here's what I came up with:

Code: Select all

IKrez_0 = readtable([trialname,'_0_IKrez.txt']);
outputs = IKrez_0.Properties.VariableNames;
data = table2array(IKrez_0);

The input to the readtable is a string of the file name for the inverse kinematics results. I had them print to a txt extension instead of mot because the readtable function didn't support the mot file type. Then calling the variable names from the data gives you all of the column headers and table2array pulls all of the numerical data out of the table into one matrix.

Hope that helps.

Best,
EAD

[hamed kouchebaghi]

Hey,

I was actually working on this today. Here's what I came up with:

Code: Select all

IKrez_0 = readtable([trialname,'_0_IKrez.txt']);
outputs = IKrez_0.Properties.VariableNames;
data = table2array(IKrez_0);

The input to the readtable is a string of the file name for the inverse kinematics results. I had them print to a txt extension instead of mot because the readtable function didn't support the mot file type. Then calling the variable names from the data gives you all of the column headers and table2array pulls all of the numerical data out of the table into one matrix.

Hope that helps.

Best,
EAD

hey,

thank you very much for your response.
I've got a few questions. what should I put instead of "trialname", "_0_IKrez.txt", and "IKrez_0" ? I think I have to put the file path containing the .txt of the motion file instead of "_0_IKrez". Am i right ??

thank you, Best
Hamed

[Evan Dooley]

Yep that's the filename, mine just loops a bunch of trials so that's how it formats to read. I think from what you gave yours would be:

Code: Select all

motAsTable = readtable('subject01_walk1_grf.txt');
outputs = motAsTable.Properties.VariableNames;
data = table2array(motAsTable);

Yeah, the mot file is just saved as a txt file, so that the readtable function will take it in.

If the script you're using is outside of the data folder, then you would need the whole path to the file, otherwise just the filename should suffice.

Hope that helps,
EAD

[hamed kouchebaghi]

Yep that's the filename, mine just loops a bunch of trials so that's how it formats to read. I think from what you gave yours would be:

Code: Select all

motAsTable = readtable('subject01_walk1_grf.txt');
outputs = motAsTable.Properties.VariableNames;
data = table2array(motAsTable);

Yeah, the mot file is just saved as a txt file, so that the readtable function will take it in.

If the script you're using is outside of the data folder, then you would need the whole path to the file, otherwise just the filename should suffice.

Hope that helps,
EAD

I entered the following code:

Code: Select all

motAsTable = readtable('C:\OpenSim 4.1\Models\Arm26\OutputReference\InverseKinematics\arm26.txt');
outputs = motAsTable.Properties.VariableNames;
data = table2array(motAsTable);

unfortunately that didn't go right, and this error shows on the window

Code: Select all

Error using table2array (line 27)
Cannot concatenate the table variables 'Var1' and 'Var2', because their types are double and cell.

Error in arm26 (line 10)
data = table2array(motAsTable);

you know.. I want I have loaded arm26 model on my screen through MATLAB and at this step I want to load the motion file.

[hamed kouchebaghi]

Hi Hmaed,

In the past, I have used "dlmread" in Matlab to import the coordinate data of a .mot file and then "readtable" to extract the variable names.

I hope this is helpful

Mike

thank you for your response in advance,
I changed the .mot file to a .txt format and then used the "readtable" but that didn't load the motion.
here is the code that I used:

Code: Select all

motAsTable = readtable('C:\OpenSim 4.1\Models\Arm26\OutputReference\InverseKinematics\arm26.txt');
outputs = motAsTable.Properties.VariableNames;

thanks,
Hamed

[hamed kouchebaghi]

Yep that's the filename, mine just loops a bunch of trials so that's how it formats to read. I think from what you gave yours would be:

Code: Select all

motAsTable = readtable('subject01_walk1_grf.txt');
outputs = motAsTable.Properties.VariableNames;
data = table2array(motAsTable);

Yeah, the mot file is just saved as a txt file, so that the readtable function will take it in.

If the script you're using is outside of the data folder, then you would need the whole path to the file, otherwise just the filename should suffice.

Hope that helps,
EAD

hello Emily,

I have trouble loading .mot file.
could you help me with this. Were you able to do it yourself?

thanks,
Hamed