Been trying (unsucessfully) to use 'which' to locate a .m file inside a package. For example, calling "which('Company.m')", when Company.m is inside a +Contents folder.
So if my current folder is C:\Users\Documents\Contents (path added to Matlab paths), "which('Company.m')" indicates no file found, but if my current folder is C:\Users***\Documents\Contents\ +Contents, then it will know the location.
Why is this? I thought that the 'which' command recursively searches through all subdirectories? Is there anyway to retrieve the path name of 'Company.m' without having to specifically source into that folder?
That should be:
which Contents.Company
If you dont know beforehand in which package it resides (or if its even in one), you could import them all:
import Contents.*
import OtherPackage.*
which -all Company
If you are still not satisfied, you could get a list of all top-level packages available, and search the methods they expose for the function you want:
%# warning: this might take more than a few seconds
p = meta.package.getAllPackages;
b = cellfun(#(pkg) ismember('Company',{pkg.FunctionList.Name}), p);
idx = find(b, 1, 'first');
p{idx}.Name
Related
Background
I encountered some strange behaviour with the function "matfile" in Matlab 2016b - not sure what's going on, and I can't replicate it or create a test case.
I have a structure, which I saved to a server, like so:
PathToFile='ServerPath\My Documents\MyProj\testMatF.mat';
save(PathToFile,'-struct','myStruct'); %I tried the -v7.3 flag
Problem
Then I read it in with:
m1=matfile(PathToFile);
On other, very similar structs, I can do:
myFields=fieldnames(m1);
But for this one file I can't, all I get is the auto "Properties" field.
What I've tried
myFields=who(m1) - gives me list of fieldnames... sometimes. I don't know the who function well, but it seems, if I intersperse who m1 then myFields=who(m1) it works.
Explicitly typing m1.TheFieldName, works.
Moving the file to a location on the comp, like C:\Data\. Then using fieldnames works.
Using load, works.
Does it have to do with the server access, corrupted file, matfile properties? One other weird thing is some of my .m files in this particular folder, when I try to open them results in: Does not exist, when clearly it does, since I click on it and can use the run function with it... Additional: Windows 7. Recently updated license.
Please let me know what info you can use to help out. Either to create a new file that will work, or fix the problem with the current file. Thanks.
EDIT
Example output in my command window - seemingly incomprehensible...
m1=matfile(fullfile(projPath,'NexusMarkersProcessed.mat'),'Writable',false)
m1 =
matlab.io.MatFile
Properties:
Properties.Source: '\bontempi.medicine.utorad.utoronto.ca\home\PT\zabjeklab3\My
Documents\Data\Active Projects\JC_Hip\FL1502\FL1502\Patient
Classification 2\NexusMarkersProcessed.mat'
Properties.Writable: false
Methods
K>> m1.Properties.Source
ans =
\bontempi.medicine.utorad.utoronto.ca\home\PT\zabjeklab3\My
Documents\Data\Active Projects\JC_Hip\FL1502\FL1502\Patient
Classification 2\NexusMarkersProcessed.mat
K>> java.io.File(m1.Properties.Source).exists()
ans =
logical
0
Pause to paste in this window... go back:
java.io.File(m1.Properties.Source).exists()
ans =
logical
1
K>> who(m1)
Your variables are:
Patient10 Patient5 Patient9 Patient11 Patient6 Patient3
Patient7
K>> who(m1) K>> who(m1) K>>
java.io.File(m1.Properties.Source).exists()
ans =
logical
0
K>>
So it sometimes finds the file, and can read it in. Othertimes it cannot - is this to do with the fact that it's on a network drive?
Any help is appreciated.
This issue is caused by accessing a file on a network drive. One workaround is to copy the file to a local drive (C: is used), and then use matfile, use the result as needed, then replace the network drive file, and delete the local file, to return things to their original state. Some research made me realize things are slower than they need to be if any files, even the .m ones, are on the network. Here's a function that worked:
function [m,noData]=safeMatFile(FilePath,safeFilePath)
%FilePath: absolute path to where the file is on the network
%safeFilePath: absolute path to where the file will be temporarily copied locally, C://
%safeDir='C:\Data';
%safeFold='tempFolder12345679';
%[~,tempDir,~]=mkdir(safeDir,safeFold);
%safeFilePath=fullfile(safeDir,safeFold,FileName);
noData=0;
dirFile=dir(FilePath);
if (length(dirFile) == 1) && ~(dirFile.isdir)%OR java below OR exist(forceFilePath,'file')==2
%if there is a file, make a temp folder on the C drive
if ~(java.io.File(safeFilePath).exists() && java.io.File(safeFilePath).isFile()) %ensure file doesn't exist, check dir too: || isempty(tempFolder)
copyfile(FilePath, safeFilePath);%moves existing file to backup folder
else
warning('SKIPPING (%s) - an old file of the same name was there, delete it!\n',safeFilePath);
return
end
%Load the temp local file into matlab
m=matfile(safeFilePath,'Writable',true);
else
m=[];
noData=1;
end
end
Then do stuff with m... and at the end:
function overwriteOldFiles()
if (java.io.File(safeFilePath).exists() && java.io.File(safeFilePath).isFile())
java.io.File(FilePath).delete();
java.io.File(safeFilePath).renameTo(java.io.File(FilePath));
end
end
and
function deleteTempFiles()
if (java.io.File(safeFilePath).exists() && java.io.File(safeFilePath).isFile())
java.io.File(safeFilePath).delete();
end
end
... Then rmdir if necessary.
Note, I tried different ways of checking if the file exists (I think the first is fastest and most reliable):
dirFile=dir(FilePath); if (length(dirFile) == 1) && ~(dirFile.isdir)
if (java.io.File(FilePath).exists() && java.io.File(FilePath).isFile())
if exist(FilePath,'file')==2
I've spent quite some time to no avail looking for a built-in MATLAB function to convert relative file paths to absolute file paths (portably).
Is there one?
I'm looking for something preferably "built-in" (i.e. available somewhere in the MATLAB distribution, including one of its toolboxes). Even a "package-private" function would be acceptable, as long as I can examine the source code of function. Second best would be a third-party function, as long as it comes with a decent test suite. I am not looking for a function written in response to this question.1
Absent any of the above, even a function to test (portably) whether a path is absolute or not would do (with the same conditions as before: either a "built-in" function or a third-party function with a test suite).
1 The difficulty with implementing such a function is not writing the function itself, but rather writing a sufficiently complete test suite for it (and, of course, making sure that the function passes all the tests!).
fullfile(pwd, relative_path) converts a relative to a absolute path.
You can test if a path is absolute using
javaFileObj = java.io.File(pathToBeTested);
javaFileObj.isAbsolute()
Unlike char(javaFileObj.getCanonicalPath()), which indeed sometimes incorrectly returns a non-existent path relative to C:\Windows\System32, isAbsolute() seems to work properly (tested on Win7, MATLAB 2015b) Therefore the code for constructing the absolute path would look like
function F = rel2abs(F)
if ~java.io.File(F).isAbsolute
F = fullfile(pwd,F);
end
This function has the advantage of being idempotent.
The fullfile(pwd, relative_path) hack works well for me, but if you want something to get you the canonical form, there is no built-in (as of 2015b), but there is a well regarded downloadable script.
http://www.mathworks.com/matlabcentral/fileexchange/28249-getfullpath
See if which fulfills your requirements:
full_path = which(relative_path);
OK, let's resurrect an old thread, if anyone is looking for this.
Here is a method, if you want the absolute path relative to your current working directory (or pwd).
% pwd: 'C:\first\branch'
dir('.\').folder % returns same as pwd, 'C:\first\branch'
dir('..\').folder % returns path one level up from pwd, 'C:\first'
dir('..\parallel_branch').folder % returns the absolute path to "parallel_branch" folder next to pwd, 'C:\first\parallel_branch'
Here's the method that MathWorks themselves uses:
[status, info] = fileattrib(file);
if status
% Return the full path if fileattrib found the file.
fullFilePath = info.Name;
end
For someone landing here with slightly relaxed portability requirements (or a suitable test bench), another idea is to create a folder listing containing only a single file using the built-in dir function, followed by path concatenation using fullfile.
dirListing = dir(relPath);
absPath = fullfile(dirListing(1).folder, dirListing(1).name);
Pros:
Idempotent, i.e. rel2abs(rel2abs(path)) = rel2abs(path)
Simplifies out any /. and /.. in the relative path
Cons:
This only works if the file exists
Tested using Matlab R2020a on Windows
I'm just trying to begin develop a game in Marmalade (6.3). But when I have made my new sources (.cpp, and .h) and added them to the mkb, and then trying to run my program, then I got an error which says that Unable to find file.cpp in path(s). It's for all of my files except the files (game.h, game.cpp, main.cpp) which were made by Marmalade when I have chosen the new 2D game project. Should I add my .cpp and .h files to anywhere else?
Thanks
It is difficult to give a categorical answer without more info. However my guess is that you've copied and pasted from an example and not understood about the syntax of the files section. Basically:
files
{
(foo)
humbug.cpp
)
The "(foo)" might look very innocent, but it actually says that humbug.cpp is actually in directory foo - relative to the mkb file. It is common practice to actually use "(source)" and put all the source files in a directory of that name - making the source layout a bit neater.
Naturally if you have (source) and don't put the files actually in directory source, they won't be found. My guess is that is what you are seeing.
Just to clarify previous answer, The format of files directive is like this -
files
{
(<Path relative to MKB>,<Alternate Path>)
["Name of the parent Group in VS/XCode project","Name of the subparent group"]
fileName.cpp
fileName.h
}
for example I have two files SoundManager.h and SoundManager.cpp in System folder of Source, while MainMenu.h and MainMenu.cpp in Source/UI. Now the files directive would be -
files
{
(Source/System)
["Source","System"] #This part is not required, it's just to arrange your files in IDE project
SoundManager.h
SoundManager.cpp
(Source/UI)
("Source","UI")
MainMenu.h
ManinMenu.cpp
}
I'm trying to set up a build involving an external tool which produces a directory as output (doxyindexer for the curious). So far, I've essentially got these commands:
target = "doxysearch.db/iamchert"
doxygen.Doxyindexer(target,["project1.xml","project2.xml","project3.xml"])
Default([target])
Default(Install(ARGUMENTS["cgibin"],"doxysearch.db"))
The problem that I'm having is that I think I'd like target to be the directory itself, not some random file inside the directory. There's nothing I can glob because the target doesn't exist until I build it and I don't want to presume anything that Dimitri might change! When I use the directory as the target, I get this error:
TypeError: Tried to lookup Dir 'doxysearch.db' as a File.:
which is why I picked iamchert to be the target. Those lines all seem to work as expected, even if my approach is a hack. However, I can't get that last line to work. I need to copy the directory doxysearch.db into the cgi-bin directory, which is specified on the command line by the user. Maybe someone can explain how to do this step properly? I'm a newb when it comes to scons!
I'm having trouble googling the answer because all the search words involved are too common to find me specific help!
SCons does in fact treat all the files in a dir as dependencies of that dir. There are some dark corners that need work, but it should work in a simple case like this.
What you need is the undocumented target_factory builder flag. When you define Doxyindexer do it like this:
doxyindexer = Builder(..., target_factory=env.fs.Dir)
and have your builder return the dir itself. That should avoid the TypeError you were getting.
Im not sure how well SCons will work with the target being a directory. The issue is: How should SCons determine if the directory has changed or not to know if it should be built? The obvious answer would be that a directory is considered to be changed if it has more or less files therein, but I dont think SCons currently does this check and you might have to make your own builder to get it.
I did the following example to test this, and it never builds:
env = Environment()
env.Command(target = 'targetDir',
source = 'srcTextFile',
action = Copy("$TARGET", "$SOURCE"))
When I execute SCons, I always get the same result:
scons: '.' is up to date
Regarding your SCons code, I think it would work better as follows:
targetDir = "doxysearch.db/iamchert"
srcFiles = ["project1.xml","project2.xml","project3.xml"]
doxygenTarget = doxygen.Doxyindexer(targetDir, srcFiles)
# This may need to be called via the Command() builder like this:
# cmd = "doxygen.Doxyindexer("$TARGET", "$SOURCE")
# doxygenTarget = env.Command(target=targetDir, source=srcFiles, action=cmd)
# This call to Default isnt really necessary
Default(doxygenTarget)
Install(ARGUMENTS["cgibin"], doxygenTarget)
I've
resDir = C:\temp\source\
--------\folder1
--------\folder2
--------\file.txt
%list the content of resDir
list = ls(resDir);
and I want to check that resDir contains folder1 and folder2 and that they are not empty
is there an equivalent of contains(java) or exist function ?
thanks
Use EXIST function to detect if a particular folder exists.
Function DIR returns structure array of all objects in the directory. Empty folder will contain only 2 objects: . (current directory) and .. (root directory).
resDir = 'C:\temp\source\';
folder = 'folder1';
folderfull = fullfile(resDir,folder); %# full path to the folder
if exist(folderfull,'dir')
foldercontent = dir(folderfull);
if numel(foldercontent) > 2
%# folder exists and is not empty
end
end
I don't think that there is a built-in equivalent of the Java function you refer to, but Matlab provides all the basics you need to write your own without too much difficulty. Hit the documentation for isdir, fileparts, etc.