Questions on obtaining files and directory structure/information and manipulating the said structure/information, searching/renaming particular files in a directory, etc., in an OS independent manner.

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1answer
54 views

How to copy a uncertain name file with the command CopyFile in Mathematica

I have many files named like this "GSM697492_500_D1.CEL", and a another file which contain the first part of the file name like this"GSM697492". I want to copy the some of the CEL files from one ...
4
votes
2answers
87 views

Minimal label to distinguish among a list of directories

I have a list of long directory names. For each directory name, I need a label just long enough to distinguish itself from the rest. Each label should be a ...
4
votes
1answer
159 views

Watch File in Directory .NET

How might I watch for a specific file to change in a directory using Mathematica/.NET code? The following works in .NET but fires twice when you change the file. ...
3
votes
1answer
45 views

Where can I permanently modify Directory[]?

First I set SetDirectory["F:\\learning_mma"];Directory[](*ok,success*) and then I quite the kernel: Quit[] an then ...
2
votes
1answer
58 views

What's wrong with this RenameFile?

I want to rename a .txt file. For example create a file on your Desktop and name it use TEST.TXT, now I want to rename it to ...
0
votes
2answers
64 views

Use modified part of file path as new file name

i want to import an image, modify it and then export the modified image. Something like this: img = Import["C:\\Images\\e4271-5.jpg"] Some modifications ...
19
votes
0answers
318 views

A documented syntax of FileNames doesn't work?

Documentation discrepancy present through 10.2 According to the documentation for FileNames under Details: However when I attempt to use this syntax I get an ...
0
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1answer
78 views

Rename a list of files [duplicate]

I need to rename a list of files .bmp having name like 1.bmp, 2.bmp,...,155.bmp. I want to get a list of files having the same number of digits in name like 001.bmp,002.bmp....,155.bmp. I am trying ...
3
votes
1answer
74 views

Windows Insert File Path

Suppose I want to Save["filename", foo] under Windows. Ordinarily, the way to deal with file names under windows is to open the Insert dialogue and find a file path, but in this use case, the file is ...
12
votes
1answer
192 views

$Path hijacked by PacletManager?

Summary: Since Mathematica version 6, the PacletManager seems to have engineered an escalating hijack of the $Path variable. Add-on packages need to have a ...
5
votes
2answers
256 views

Find file names in directory

I am trying to find the list of any file in any directory of a given name (by in the directory, I mean directly in the directory, so in a directory which is in the directory would not count). For the ...
15
votes
1answer
204 views

File-name completion for custom functions

Mathematica 10 has introduces file name completion. It works only with certain built-in functions such as Import, SetDirectory, ...
2
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2answers
223 views

Overwriting first line of large file

As mentioned, I wish to read the first line of a file, and if needed, overwrite it with a new string. The aim is to have a CSV with a list of possible elements. Example: ...
3
votes
1answer
168 views

how to write TableForm expression into file?

Now I have a list stored in data as follows data = {{"Ca", 1, 1, 1}, {"Ca", 2, 2, 2}, {"Ca", 3, 3, 3}} the ...
2
votes
1answer
75 views

How to read from /dev/random?

I am looking to read a few bytes from /dev/random on OS X and Linux. The simplest approach fails on both operating systems (see below). Why? What is a ...
4
votes
1answer
185 views

Get the last line from each of a large number of files, transform them, and write all results to a single new file

I have several hundreds of .csv files that are not logically named (contains numbers, characters, and special characters), all stored in a directory. Each file has large but unequal number of rows and ...
7
votes
1answer
425 views

Mathematica 10 doesn't support path containing Chinese characters

Note: This works correctly in version 10.0.2. I tried to import file in Mathematica 10 ( windows 7 system), the path contains some chinese characters. After holding ctrl+shift, and drag the file ...
0
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1answer
56 views
-1
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3answers
102 views

How do i import a list of files, choosing the name

I have this list of files, i'm using FileNames[{"*.txt"}, NotebookDirectory[]] to import it, but i just want the ones without inelastic on the name. How can i select just by the name? Thanks ...
2
votes
2answers
364 views

How to set an absolute path name using SetDirectory?

I tried the following: Directory[] /Users/John SetDirectory["Library/Mathematica"] ...
0
votes
1answer
124 views

Loading and processing five files at a time from a directory containing many, many files

I have 3000 files (for example: aa101.csv, aa108.csv, aa120.csv, ...) and I need to process them. I need to load five files from a folder, process them, and export them to new list in Excel. Then I ...
2
votes
1answer
100 views

Get names of all folders in a directory [duplicate]

I simply want a list of the folder names (without subfolders) in a directory, but can't seem to find the right command for this. Can anyone help me out :)? Thanks in advance
2
votes
2answers
128 views

Specify column width while exporting

I am trying to export a set of data into a file but I can not force mathematica to keep a certain width for each column. For example, when I export a table: ...
0
votes
2answers
181 views

Creating directory structure through Mathematica

Is there mkdirs() (make directory structure) equivalent in Mathematica? I want to specify something like this : dir1/dir2/dirn ...
4
votes
1answer
105 views

Order imported files by their alteration date

Probably a very easy question, but I could not find the answer, so it would be very nice if you can help me: Let us say I have 10 files, all with the extension ...
0
votes
1answer
931 views

NotePad++ User defined language

I know there is a xml file with language for Mathematica notebook (nb or m files). The link is http://sourceforge.net/apps/mediawiki/notepad-plus/?title=User_Defined_Language_Files Now I want a xml ...
2
votes
1answer
95 views

Merge StyleSheet into a notebook

I have a custom style called style1.nb and I want to install it into a notebook Class01.nb so I can send only the notebook file to my students with the style of style1.nb. Is that possible?
2
votes
1answer
64 views

How can I automatically name files being exported based on input parameters

I have Mathematica notebook that performs some operation say a=2 b=3 c=5 d=4 how do I set the output file after evaluation to be named using the values ...
1
vote
2answers
325 views

How to generate a unique file name similar as that created by CreateTemporary

CreateTemporary can generate a unique file name like ...
1
vote
3answers
2k views

How to export data to a plain text file?

I am preparing data used by a command line program. It requires data in a simpliest possible format: value_x1 value_y1 value_x2 value_y2 ... value_xN value_yN ...
0
votes
1answer
110 views

Create new file, based on 500 articles

I've got a folder with 500 newspaper articles. Each article is saved in a seperate file with a number in the title like "1.txt", "2.txt". Each article has a date but it is not clear in which line the ...
12
votes
3answers
173 views

What kind of check does DirectoryQ exactly perform?

I'm using Mathematica 9.0.1 on Windows XP and my drive letters are assigned as follows: C: and D: are hard local disks, while ...
2
votes
1answer
92 views

How to create .ico file in Mathematica?

How to create .ico file in Mathematica? I mean the favicon images used for web sites. Directly using Export["file.ico", <some graphical expression>] does ...
0
votes
0answers
199 views

Savitzky-golay filter

How to use Savitzky-golay filter on csv file? I have file.csv in this format: 0.1,1.6,2.8,0 0.2,1.2,2.3,1 0.7,1.5,2.4,2 0.6,1.2,2.7,3 0.4,1.4,2.9,4 0.3,1.3,2.5,5 ...
3
votes
1answer
200 views

Writing results directly to file

I am trying to find all simple paths in a large directed graph (542 vertex, density ~ 5%) between two nodes. For this purpose, I use the algorithm from this thread. Unfortunately, my computer is ...
5
votes
2answers
189 views

How does the speed of WriteString compare to other languages?

I'm doing something where the most sensible approach seems to be to open a file and write to it as I process data from some large tables. Old school. While testing the program, I remembered the low ...
2
votes
2answers
221 views

How to read non-standard-format data into Mathematica from a file

I would like to read non-standard-format data into Mathematica from a file. How can this be achieved? For example, how can I read the following text file of data into Mathematica: ...
4
votes
1answer
193 views

What is the correct way to provide Mathematica with a path to Python user scripts?

What is the correct way to provide Mathematica with a path to Python user scripts? Simply executing Python as a shell command, using something like ...
1
vote
1answer
262 views

Read a binary file to an image in memory then analyze it

Is it possible to read a whole file (~100 MBs) into memory, and then use BinaryRead[] function on the data loaded into memory to read/cast it to the types I need with a proper StreamPosition pointer? ...
0
votes
1answer
221 views

How to change the MATHEMATICA_USERBASE directory

I’ve found, from reading the help on MathKernel in the help system and in a number of questions here, that to make that change in Windows at least one apparently needs to enter “MathKernel … options” ...
1
vote
2answers
226 views

Processing all files in a folder automatically

I have a lot of files in a folder that needs to be process through a function that I have written in Mathematica. I need help writing a code that would process all the files automatically. ...
1
vote
1answer
150 views

how to show or find full path of file listed in the File->Open dialog?

This question was posted 2 days ago at community. I had a good answer but it does not quit do what I wanted. Hence I am trying here to see if someone might know of some other solution. Here is the ...
2
votes
1answer
82 views

How to use relative paths in a notebook? [duplicate]

To maintain mobility of project files, I want to use relative paths in my notebooks. For example, I have a directory named "proj" and my notebook file is located in this directory. Meanwhile, I have ...
3
votes
1answer
262 views

Windows Explorer Natural Order

Currently there are a list of notebooks in Windows that I am processing in a folder. Ideally I would like the notebooks to be concated in the same order as how they display in Windows Explorer. I ...
1
vote
2answers
99 views

Identify / change working directory for the InstallableNET runtime

I am currently attempting to use .NET/link to call a third party DLL from Mathematica using DLLDefinedFunction. I have been able to link against and call many of ...
2
votes
2answers
243 views

Fastest way to concatenate many text files in a given directory

I have about 1 million .txt text files in a directory which I would like to all concatenate in one single text file (separated by a newline character "\n"). Because of the number of files and their ...
5
votes
2answers
173 views

Reading non-tabular data with NaN-s from file

A NaN stands for an entry that is not a number/undefined/missing/infinite/etc. On my machine the C code printf("%f", 0/0.) produces ...
0
votes
2answers
82 views

when using FileDate----The Creation date of a file is not available on Macintosh and Unix?

when I use FileDate[filename,"Creation"] it gives messages like FileDate::nocreationunix: The Creation date of a file is not available on Macintosh and ...
3
votes
1answer
75 views

Why does Thread FileDate give an error message?

I tried for example Thread[FileDate[FileNames["new*", "h:\\temp\\", 1]]] It gives FileDate::fstr: File specification ...
4
votes
2answers
172 views

Find a notebook I had open recently

I worked on a notebook a few weeks ago and now I can't find after looking through the most likely directories. The recent list only has 6 items in it, none of them the notebook in question. Is there a ...