I have a very short script that I'm running in Octave and I want to read a user specified text file. It works on my 64-bit laptop, but not on my 32-bit one. The Octave version is 3.2.2.
plotinfra.m
filename=uiputfile
data=load(filename);
plot(data(:,1),data(:,2));
On my other laptop, this brings up a filesystem menu where I can choose the specific file to load. On this laptop, I see this error message instead:
error: uiputfile undefined near line 1 column 19 error: called from: error: plotinfra.m at line 1, column 17
If I hardcode filename with a path it works. I also tried using uigetfile and that did not work either.
Version 3.2.2 of Octave was released in 2009. When I enter edit uiputfile in Octave, at the top of the file I see the line:
## Copyright (C) 2010-2019 Kai Habel
Thus, it seems that this function was created after your release of Octave. This is the reason you get a "uiputfile undefined" error message.
You will have to upgrade your version of Octave to use this function.
I'm using Ubuntu 18.04 64Bit Linux Octave 4.2.2 see if this works for you. It will store the filename in the variable file_name and the path location in the variable path_dir
% create your dataset (exampledata)
x = (-1:0.1:1);
y = sin(x);
data = zeros(length(x),2);
data(:,1) = x;
data(:,2) = y;
% save data to file (your textfile)
save('-ascii','data2.txt','data');
%load textfile
%data2 = load('data2.txt'); %hard coded
[file_name,path_dir] = uigetfile('*.txt'); %pops up uibox choose data2.txt
data2 = load(strcat(path_dir,file_name)); %loads the file and the data
%plot data
plot(data2(:,1),data2(:,2));
Related
I am extracting prosody features from an audio file while using Opensmile using Windows version of Opensmile. It runs successful and an output csv is generated. But when I open csv, it shows some rows that are not readable. I used this command to extract prosody feature:
SMILEXtract -C \opensmile-3.0-win-x64\config\prosody\prosodyShs.conf -I audio_sample_01.wav -O prosody_sample1.csv
And the output of csv looks like this:
[
Even I tried to use the sample wave file given in Example audio folder given in opensmile directory and the output is same (not readable). Can someone help me in identifying where the problem is actually? and how can I fix it?
You need to enable the csvSink component in the configuration file to make it work. The file config\prosody\prosodyShs.conf that you are using does not have this component defined and always writes binary output.
You can verify that it is the standart binary output in this way: omit the -O parameter from your command so it becomesSMILEXtract -C \opensmile-3.0-win-x64\config\prosody\prosodyShs.conf -I audio_sample_01.wav and execute it. You will get a output.htk file which is exactly the same as the prosody_sample1.csv.
How output csv? You can take a look at the example configuration in opensmile-3.0-win-x64\config\demo\demo1_energy.conf where a csvSink component is defined.
You can find more information in the official documentation:
Get started page of the openSMILE documentation
The section on configuration files
Documentation for cCsvSink
This is how I solved the issue. First I added the csvSink component to the list of the component instances. instance[csvSink].type = cCsvSink
Next I added the configuration parameters for this instance.
[csvSink:cCsvSink]
reader.dmLevel = energy
filename = \cm[outputfile(O){output.csv}:file name of the output CSV
file]
delimChar = ;
append = 0
timestamp = 1
number = 1
printHeader = 1
\{../shared/standard_data_output_lldonly.conf.inc}`
Now if you run this file it will throw you errors because reader.dmLevel = energy is dependent on waveframes. So the final changes would be:
[energy:cEnergy]
reader.dmLevel = waveframes
writer.dmLevel = energy
[int:cIntensity]
reader.dmLevel = waveframes
[framer:cFramer]
reader.dmLevel=wave
writer.dmLevel=waveframes
Further reference on how to configure opensmile configuration files can be found here
I tried converting my .csv file to .dat format and tried to load the file into Octave. It throws an error:
unable to find file filename
I also tried to load the file in .csv format using the syntax
x = csvread(filename)
and it throws the error:
'filename' undefined near line 1 column 13.
I also tried loading the file by opening it on the editor and I tried loading it and now it shows me
warning: load: 'filepath' found by searching load path
error: load: unable to determine file format of 'Salary_Data.dat'.
How can I load my data?
>> load Salary_Data.dat
error: load: unable to find file Salary_Data.dat
>> Salary_Data
error: 'Salary_Data' undefined near line 1 column 1
>> Salary_Data
error: 'Salary_Data' undefined near line 1 column 1
>> Salary_Data
error: 'Salary_Data' undefined near line 1 column 1
>> x = csvread(Salary_Data)
error: 'Salary_Data' undefined near line 1 column 13
>> x = csvread(Salary_Data.csv)
error: 'Salary_Data' undefined near line 1 column 13
>> load Salary_Data.dat
warning: load: 'C:/Users/vaith/Desktop\Salary_Data.dat' found by searching load path
error: load: unable to determine file format of 'Salary_Data.dat'
>> load Salary_Data.csv
warning: load: 'C:/Users/vaith/Desktop\Salary_Data.csv' found by searching load path
error: load: unable to determine file format of 'Salary_Data.csv'
Salary_Data.csv
YearsExperience,Salary
1.1,39343.00
1.3,46205.00
1.5,37731.00
2.0,43525.00
2.2,39891.00
2.9,56642.00
3.0,60150.00
3.2,54445.00
3.2,64445.00
3.7,57189.00
3.9,63218.00
4.0,55794.00
4.0,56957.00
4.1,57081.00
4.5,61111.00
4.9,67938.00
5.1,66029.00
5.3,83088.00
5.9,81363.00
6.0,93940.00
6.8,91738.00
7.1,98273.00
7.9,101302.00
8.2,113812.00
8.7,109431.00
9.0,105582.00
9.5,116969.00
9.6,112635.00
10.3,122391.00
10.5,121872.00
Ok, you've stumbled through a whole pile of issues here.
It would help if you didn't give us error messages without the commands that produced them.
The first message means you were telling Octave to open something called filename and it couldn't find anything called filename. Did you define the variable filename? Your second command and the error message suggests you didn't.
Do you know what Octave's working directory is? Is it the same as where the file is located? From the response to your load commands, I'd guess not. The file is located at C:/Users/vaith/Desktop. Octave's working directory is probably somewhere else.
(Try the pwd command and see what it tells you. Use the file browser or the cd command to navigate to the same location as the file. help pwd and help cd commands would also provide useful information.)
The load command, used as a command (load file.txt) can take an input that is or isn't defined as a string. A function format (load('file.txt') or csvread('file.txt')) must be a string input, hence the quotes around file.txt. So all of your csvread input commands thought you were giving it variable names, not filenames.
Last, the fact that load couldn't read your data isn't overly surprising. Octave is trying to guess what kind of file it is and how to load it. I assume you tried help load to see what the different command options are? You can give it different options to help Octave figure it out. If it actually is a csv file though, and is all numbers not text, then csvread might still be your best option if you use it correctly. help csvread would be good information for you.
It looks from your data like you have a header line that is probably confusing the load command. For data that simply formatted, the csvread command can bring in the data. It will replace your header text with zeros.
So, first, navigate to the location of the file:
>> cd C:/Users/vaith/Desktop
then open the file:
>> mydata = csvread('Salary_Data.csv')
mydata =
0.00000 0.00000
1.10000 39343.00000
1.30000 46205.00000
1.50000 37731.00000
2.00000 43525.00000
...
If you plan to reuse the filename, you can assign it to a variable, then open the file:
>> myfile = 'Salary_Data.csv'
myfile = Salary_Data.csv
>> mydata = csvread(myfile)
mydata =
0.00000 0.00000
1.10000 39343.00000
1.30000 46205.00000
1.50000 37731.00000
2.00000 43525.00000
...
Notice how the filename is stored and used as a string with quotation marks, but the variable name is not. Also, csvread converted non-numeric header data to 'zeros'. The help for csvread and dlmread show you how to change it to something other than zero, or to skip a certain number of rows. If you want to preserve the text, you'll have to use some other input function.
I'm beginning with octave. I've created a file called squareThisNumber.m in My Documents with the following code:
function y = squareThisNumber(x)
y = x^2;
I set the directory to look at My Documents with
cd 'C:\Users\XXXX\My Documents'
I type "squareThisNumber(3)" into octave, and all I'm getting is "Error: 'squareThisNumber' undefined near line 3 column 1." What am I doing wrong?
EDIT:
When I type ls into octave, I get "error: ls: command exited abnormally with status 127". Did I not install Octave correctly?
This behavior sure does seem like there's a problem with octave's current working directory. Does the command dir or pwd also have the same problem?
But you might be able to ignore all of that by
addpath("C:\Users\XXXX\My Documents");
Did you place the end keyword at the end? Code example below works perfectly for me
https://saturnapi.com/fullstack/function-example
% Welcome to Saturn's MATLAB-Octave API.
% Delete the sample code below these comments and write your own!
function y = squareThisNumber(x)
y = x^2;
end
squareThisNumber(9)
Please advise what to do to make the rgb2gray work in Octave.
I found this thread, but still I would like to use the rgb2gray functionality instead of manually calculating for each color channel.
The code that I run:
I = imread('smile.jpg');
G = rgb2gray(I);
The error I get:
error: 'rgb2gray' is undefined near line 10 column6
Additional:
Octave version: 3.6.4
Image package is installed. Version: 2.0.0.
The 'rgb2gray.m' is installed in C:\Octave\share\octave\packages\image-2.0.0
Thanks,
The problem is that you didn't load your packages. When you type pkg list you can find which ones are loaded by an asterisk in front of their names. Load a package with pkg load image.
Having to load a packages is that thing that most users find strange but if you compare with other languages, such as Python, Perl, or C++, would you expect them to import, use, or #include every libraries available in the system by default? See Octave's FAQ for more details.
The function rgb2ntsc has historically been part of Octave (I mean historically, since 1994). However, since Octave version 4.4 (released in 2018), the function was moved from Octave to the Octave Forge image package. It is part of the Octave Forge image package since its 2.8.0 version (released in 2018).
Basically, how to use rgb2ntsc depends on what version you have:
Octave >= 4.4.0
You need to install and load the image package version 2.8.0 or later (the latest is 2.12.0).
octave> pkg install -forge image
octave> pkg load image
unfortunately, it did not work for me. So I use the code, and it works. which is from Octave rgb2ntsc missing in latest version
function yiq_img = rgb2ntsc(rgb_img)
%RGB2NTSC Transform a colormap or image from red-green-blue (RGB)
% color space to luminance-chrominance (NTSC) space.
% The input may be of class uint8, uint16, single, or double.
% The output is of class double.
% https://octave.sourceforge.io/octave/function/rgb2ntsc.html
if isa(rgb_img, 'uint8') || isa(rgb_img, 'uint16') || ...
isa(rgb_img, 'double')
red = rgb_img(:, :, 1);
green = rgb_img(:, :, 2);
blue = rgb_img(:, :, 3);
y = 0.299 * red + 0.587 * green + 0.114 * blue;
i = 0.596 * red - 0.274 * green - 0.322 * blue;
q = 0.211 * red - 0.523 * green + 0.312 * blue;
yiq(:, :, 1) = y;
yiq(:, :, 2) = i;
yiq(:, :, 3) = q;
yiq_img = double(yiq);
else
error('Input image datatype is not supported')
end
end
I am viewing the week5 lecture notes by Andrew Ng. AI machine learning course. https://www.coursera.org/learn/machine-learning/resources/EcbzQ
refer to: Octave rgb2ntsc missing in latest version
The Octave documentation on this subject is both intimidating and sparse.
I did not know where else to document the solution I found, so I am posting here. I apologize if that's inappropriate, but I want to help the next guy.
The following solution is for a simple windows distributable.
Use Case:
A solution is developed in Octave 3.2.4, and needs to be distributed to end-users with few computer skills. Installing and explaining Octave is impossible, the solution must be "one-click" or "brain-dead-simple."
Known Issues:
imread fails in 3.2.4 because file_in_path.m is wrong. You will need to update the file file_in_path.m to the following (just replace it):
function name=file_in_path(p,file)
idx=[1 findstr(p,pathsep) length(p)+1];
for i=1:length(idx)-1
if idx(i+1)-idx(i)<=1
dir=strcat(pwd,"/");
else
dir=p(idx(i)+1:idx(i+1)-1);
end
name = fullfile(dir, file);
fid = fopen(name,"r");
if fid >= 0
fclose(fid);
return
end
end
fid = fopen(file,"r");
if fid >= 0,
fclose(fid);
name=file;
return
end
name=[];
Solution: Create a distributable exe using mkoctfile, and package this exe with the core Octave files, and other .oct and .m files as necessary.
Step 1: Create a stand-alone executable.
You can see code that works here:
http://www.gnu.org/software/octave/doc/interpreter/Standalone-Programs.html
Particularly the file "embedded.cc".
I have simplified that file as follows:
#include <iostream>
#include <octave/oct.h>
#include <octave/octave.h>
#include <octave/parse.h>
int
main (int argc, char *argvc[])
{
string_vector argv (2);
argv(0) = "embedded";
argv(1) = "-q";
octave_main (2, argv.c_str_vec(), 1);
octave_value_list in = octave_value (argvc[1]);
octave_value_list out = feval ("your_custom_m_file", in);
if (!error_state && out.length () > 0)
{
}
else
{
std::cout << "invalid\n";
}
return 0;
}
Build this file with the command
mkoctfile --link-stand-alone embedded.cc -o embedded
It may throw warnings, but as long as it throws no errors, you should be fine. The file embedded.exe will be built, and can be run. The only issue is that it will lack all the goodies that make octave awesome. You will have to provide those.
Step 2: Create a distribution folder
You will need to create a copy of many of the Octave files. I suggest a directory specifically for this. At a minimum, you will need a copy of all or most of the DLLs in \bin. Additionally, place your distributable executable in this directory.
Step 3: Other files whack-a-mole
You will now need to find out what other files will be necessary to run your .m script. You can simplify this step by copying \oct\i686-pc-mingw32*.oct and \share\octave\3.2.4\m\*\*.m to the distribution directory, although this will be overkill, and will not actually prevent the whack-a-mole step.
Now, you must play whack-a-mole or the time-honored tradition of "where my includes be at, yo?"
Open a cmd prompt and navigate to your distribution folder.
Get rid of any useful PATH strings. Your customers won't have them.
Attempt to run the program embedded.exe. You will get an error such as the following:
embedded.exe
error: `max' undefined near line 83 column 22
error: evaluating argument list element number 1
error: evaluating argument list element number 1
error: called from:
error: T:\sms\Development\research\c2\disttest\strcat.m at line 83, column 3
error: T:\sms\Development\research\c2\disttest\file_in_path.m at line 5, column 10
error: T:\sms\Development\research\c2\disttest\imread.m at line 50, column 6
A Search in your Octave installation for "max". It will either be a .oct or a .m file. In this case, it is a .oct file, max.oct. Copy it to your distribution directory.
B You search for something obvious like "min", and get no results. This is because the Loadable Function "min" is in the .oct file "max.oct". Make a copy of max.oct, and rename it to min.oct. It will work now. How do you know where the functions are? I'm not sure. Most of them are in obvious places like "max.oct" for min, and "fft2.oct" for "ifft2.oct". Good luck with all that.
Repeat until your executable runs.
Just to add that if you want to run a script instead of an m function, then the line of the embedded.cc:
octave_value_list out = feval ("your_custom_m_file", in);
should be:
octave_value_list out = feval ("your_custom_m_script");
Also use 'which' to find where the missing functions are packed. For example for the min function:
octave:22> which min
min is a function from the file C:\Octave\Octave3.6.2_gcc4.6.2\lib\octave\3.6.2\oct\i686-pc-mingw32\max.oct
Something I found when linking my custom m file into an Octave standalone:
Needed #include <octave/toplev.h>
Replace return 0; (as above) with clean_up_and_exit(0);
Without these steps my program repeatedly crashed on exit.
Run mkoctfile --link-stand-alone embedded.cc -o embedded
from the octave solution and not from a batch file.
Just saved you half day (-;
In the above solution in bullet 4 B:
B You search for something obvious like "min", and get no results.
This is because the Loadable Function "min" is in the .oct file
"max.oct". Make a copy of max.oct, and rename it to min.oct. It will
work now.
This might not work if some function is being called from #folder function.m and also to avoid unnecessary duplicated files, just add the following code somewhere in your m file outside #folder
autoload ("min", "max.oct");
Likewise, it can be removed via
autoload ("min", "max.oct", "remove");
Ensure that the path to max.oct is provided here.
The above understanding is based on a file PKG_ADD and PKG_DEL in the communications package located at \Octave-4.0.1\lib\octave\packages\communications-1.2.1\i686-w64-mingw32-api-v50+\
Check out Stratego Octave Compiler.
(I've not tested it yet, but plan to do so in the next few days.)
I had that very same requirement (one-click, brain-dead-simple), so I made a setup that contained only curl.exe, the batch file below, an exe which was a .bat in disguise (simply calling the batch file below) and the .vbs script below (not writen by me). And of course my m-file.
This will download Octave 4.2.1 as a portable program (32 bit, otherwise we'dd have to download again if the system turns out to be 32 bit), unpack using the vbs script, move the contents to the same folder as the batch file and run it in GUI mode. Every next time the same script is called, it will only check if octave.bat is still there.
Of course this results in a huge waste of disk space, downloading the 280MB zip, which unpacks to over 1GB (which I make even worse by not deleting the zip afterwards), and you're stuck with a cmd window that is not easy to hide.
But it does offer the simplest solution I could find. It is also less likely to break in the future (either with an update of your own, or an update from Octave). Some glorious day, mkoktfile will actually be easy to use and will solve dependencies on its own, but until that day this remains the least headache-inducing solution I could find. And aspirins are more expensive than someone else's disk space.
::this file will test if the octave portable is downloaded and unpacked
#ECHO OFF
SET my_m_file=your_mfile.m
SET name_of_this_script=run_me.bat
::if the file exists, skip to the actual running.
IF EXIST "octave.bat" goto OctaveIsExtracted
IF EXIST "octave-4.2.1-w32.zip" goto OctaveIsDownloaded
ECHO The runtime (Octave portable 4.2.1) will now be downloaded.
ECHO This may take a long time, as it is about 280MB.
ECHO .
ECHO If this download restarts multiple times, you can manually download the octave-4.2.1-w32.zip from the GNU website. Make sure to unpack the contents.
::if this errors, you can uncomment the line with archive.org (which doesn't report total size during download)
curl http://ftp.gnu.org/gnu/octave/windows/octave-4.2.1-w32.zip > octave-4.2.1-w32.zip
::curl http://web.archive.org/web/20170827205614/https://ftp.gnu.org/gnu/octave/windows/octave-4.2.1-w32.zip > octave-4.2.1-w32.zip
:OctaveIsDownloaded
::check to see if the file size is the correct size to assume a successful download
::if the file size is incorrect, delete the file, restart this script to attempt a new download
::file size should be 293570269 bytes
call :filesize octave-4.2.1-w32.zip
IF /I "%size%" GEQ "293560000" goto OctaveIsDownloadedSuccessfully
del octave-4.2.1-w32.zip
::start new instance and exit and release this one
start %name_of_this_script%
exit
:OctaveIsDownloadedSuccessfully
IF EXIST "octave.bat" goto OctaveIsExtracted
::unzip and move those contents to the current folder
ECHO Unzipping octave portable, this may take a moment.
cscript //B j_unzip.vbs octave-4.2.1-w32.zip
SET src_folder=octave-4.2.1
SET tar_folder=%cd%
for /f %%a IN ('dir "%src_folder%" /b') do move %src_folder%\%%a %tar_folder%
pause
:OctaveIsExtracted
octave.bat %my_m_file%
goto :eof
:filesize
set size=%~z1
exit /b 0
And j_unzip.vbs
' j_unzip.vbs
'
' UnZip a file script
'
' By Justin Godden 2010
'
' It's a mess, I know!!!
'
' Dim ArgObj, var1, var2
Set ArgObj = WScript.Arguments
If (Wscript.Arguments.Count > 0) Then
var1 = ArgObj(0)
Else
var1 = ""
End if
If var1 = "" then
strFileZIP = "example.zip"
Else
strFileZIP = var1
End if
'The location of the zip file.
REM Set WshShell = CreateObject("Wscript.Shell")
REM CurDir = WshShell.ExpandEnvironmentStrings("%%cd%%")
Dim sCurPath
sCurPath = CreateObject("Scripting.FileSystemObject").GetAbsolutePathName(".")
strZipFile = sCurPath & "\" & strFileZIP
'The folder the contents should be extracted to.
outFolder = sCurPath
'original line: outFolder = sCurPath & "\"
WScript.Echo ( "Extracting file " & strFileZIP)
Set objShell = CreateObject( "Shell.Application" )
Set objSource = objShell.NameSpace(strZipFile).Items()
Set objTarget = objShell.NameSpace(outFolder)
intOptions = 256
objTarget.CopyHere objSource, intOptions
WScript.Echo ( "Extracted." )