I want to install the image package in Octave-online.net, but when I tried it, it gave me an error message. I am on a MacBook Air 2013 (if that's important), on macOS 11.7.2 .
I have tried to install Octave on my laptop and that didn't work, so I'm trying it with the online version.
I wrote
pkg install -forge image
and expected it to install the package, but instead it gave me the following error message:
error: get_forge_pkg: could not read version number from package's page
error: called from
get_forge_pkg at line 55 column 7
get_forge_download at line 32 column 14
pkg at line 538 column 31
Does somebody know how to fix this or another way to install the package?
Thanks so much!
Related
i'm doing a program in octave in which i got
t=0:.0002:20;
Gs=tf(100,[1 10])
u1=sin(t);
y1=lsim(Gs,u1,t);
plot(t,9.95*sin(t-0.1),’r’,t,y1,’b’)
However when i write Gs=tf(100,[1 10]) in the command window it appears "warning: the 'tf' function belongs to the control package from Octave Forge which
you have installed but not loaded. To load the package, run 'pkg load
control' from the Octave prompt."
How can i load this package? I trully can't understand it...
enter image description here
enter image description here
When i load it it appears:
pkg load control
warning: addpath: C:\Octave\OCTAVE~1.0\mingw64\share\octave\packages\control-3.2.0: No such file or d
irectory
warning: called from
load_packages_and_dependencies at line 48 column 5
load_packages at line 47 column 3
pkg at line 461 column 7
t=0:.0002:20;
Gs=tf(100,[1 10])
error: could not find any INDEX file in directory C:\Octave\OCTAVE~1.0\mingw64\share\octave\packages
control-3.2.0, try 'pkg rebuild all' to generate missing INDEX files
error: called from
describe>parse_pkg_idx at line 94 column 5
describe at line 59 column 40
pkg at line 555 column 43
unimplemented>check_package at line 540 column 15
unimplemented at line 127 column 11
In the octave terminal, type
pkg load control
To load the control package. If you do not already have the control package installed, you need to install it. You can do so directly from Octave Forge by typing
pkg install -forge control
Note that this will install this package in your predefined 'prefix'. You can find where that is by typing
pkg prefix
If you're not sure if you have the control package installed, you can check the list of already installed packages by typing
pkg list
Type help pkg to see more details about how octave's package manager works.
In any case, the tf function belongs to the control package, and like all packages, you need to load it before you can use its functions.
Having said this, even after loading the control package, your above code doesn't work. It seems like you're calling the tf function using the wrong format.
I am new to Octave, coming from Matlab. I am trying to install a few packages, and so far none has worked. I have tried the download method from forge, then running the install command. But my question is about my latest attempt. There it is:
pkg install -global -forge io
csvconcat.cc:79:37: warning: result of comparison of constant 18446744073709551615 with expression of type
'unsigned int' is always true [-Wtautological-constant-out-of-range-compare]
while ((pos=str.find(prot, pos)) != str.npos) {
~~~~~~~~~~~~~~~~~~~~~~~~~ ^ ~~~~~~~~
1 warning generated.
error: couldn't append to /Applications/Octave-4.4.1.app/Contents/Resources/usr/Cellar/octave-octave-app#4.4.1/4.4.1/share/octave/octave_packages
save: unable to open output file '/Applications/Octave-4.4.1.app/Contents/Resources/usr/Cellar/octave-octave-app#4.4.1/4.4.1/share/octave/octave_packages'
error: called from
install at line 254 column 7
pkg at line 437 column 9
Couldn't find any documentation on it, I am a bit lost.... (oh and btw, I can't find the config.log file! where is that gem?)
I am on MacOS catalina 10.15.7, and just followed that procedure https://flaviocopes.com/fix-xcrun-error-invalid-active-developer-path/, which solved the issues I had before which is described on that page.
cheers for any help
The error:
error: couldn't append to /Applications/Octave-4.4.1.app/Contents/Resources/usr/Cellar/octave-octave-app#4.4.1/4.4.1/share/octave/octave_packages
save: unable to open output file '/Applications/Octave-4.4.1.app/Contents/Resources/usr/Cellar/octave-octave-app#4.4.1/4.4.1/share/octave/octave_packages'
error: called from
install at line 254 column 7
pkg at line 437 column 9
basically says it's failing to save to that file. Probably a permissions issue. Check if the file /Applications/Octave-4.4.1.app/Contents/Resources/usr/Cellar/octave-octave-app#4.4.1/4.4.1/share/octave/octave_packages exists and its permissions. That file is a database of all packages installed globally, i.e., for all users in the system.
Fixing the permission issues is dependent on what is the permissions issue you have (probably you need to run octave as root to install a global package). But maybe try to install the package for your user only, i.e., install the package without the -global flag, like so:
pkg install -forge io
I've been trying to start Quartus II on my system (which is a DELL running Fedora 22 64-bit). Now I try to run the binary file in command line and I get hit with this weird error as follow:
[kuma0629#eecad47 bin]$ ./quartus
quartus: symbol lookup error: /lib/libXext.so.6: undefined symbol: _XGetRequest
Now, I googled this problem and seems like libX11 needs to be upgraded. But I'm not sure how to do this for Fedora in particular because there's not much support online.
How do I go about fixing this problem?
I am having a tough time with the symbolic package in octave.
Software Versions (downloaded everything today):
-Octave: 4.0.0
-OctSymPy 2.2.2
-Python: 3.4
-SymPy: 0.7.6
When I try to multiply/divide/raise to a power symbolic variables, I get the following error:
PYTHON: Error in var export
Resetting the octsympy communication mechanism
Closing the Python pipe...
error: python_cmd: unexpected return
error: called from
python_cmd at line 143 column 6
mtimes at line 42 column 5
syms X Y
X*Y
I am totally stumped. Does anyone have any ideas on the cause of this? I can add and differientiate symbolic expressions, so it is working to some extent.
Thanks!
I had the same problem and I just have downloaded and installed the python version 2.7.11 and worked fine.
Ah, don't forget to reinstall SimPy, but this time on the new Python version.
When you get back to octave, it'll recognize that version.
I Have in my Mac:
Octave-3.4.0
Gnuplot 4.2 - that I had to install because I had problems plotting - it wouldn't plot at all.
I need to load a netcdf file, the error that came was:
nc = netcdf('/users/matheuscortezi/Desktop/Pcse005/ocean_avg.nc', 'r')
error: `netcdf' undefined near line 9 column 6
So I think I don't have the netcdf comand installed, and tried installing by typing this on octave:
pkg install -global -forge octcdf
The error message that I receive from that is:
configure: error: in `/var/tmp/oct-t8XcYD/octcdf/src':
configure: error: C compiler cannot create executables
See `config.log' for more details.
the configure script returned the following error: checking for gcc... /usr/bin/gcc-4.2
checking whether the C compiler works... no
error: called from `pkg>configure_make' in file /Applications/Octave.app/Contents/Resources/share/octave/3.4.0/m/pkg/pkg.m near line 1325, column 9
error: called from:
error: /Applications/Octave.app/Contents/Resources/share/octave/3.4.0/m/pkg/pkg.m at line 783, column 5
error: /Applications/Octave.app/Contents/Resources/share/octave/3.4.0/m/pkg/pkg.m at line 354, column 9
I haven't the faintest idea about what I should do. How can I solve this problem with either:
fixing this error, or
installing a netcdf "comand pack" (i don't know the name for that) so I can use netcdf() as in the example given.
Hope I was clear enough.
It seems to me that you installed Octave from the Mac OSX App bundle. That is not recommended at all. You should install from one of the package managers as explained on Octave's wiki. As far as I know, there are 3 options for Mac (see previous link). Just search for one that also has the netcdf package.
Anyway, if you really don't want to install it through a package manager (but seems to me you really should), seems that your problem lies on gcc (the GNU C compiler). do you have it installed at all? Some packages have code in C++ or C and are also dependent on some external libraries.
EDIT using a package manager would have also solved your problem about plotting since it would install gnuplot at same time