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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16
votes
0answers
179 views

A documented syntax of FileNames doesn't work?

bug present as of 10.0.2 According to the documentation for FileNames: However when I attempt to use this syntax I get an error: ...
1
vote
1answer
50 views

Exporting File Outside Home Directory

When running Mathematica (v10) on my Raspberry Pi, I'd like to output an image file to a directory other than /home/pi. I understand that letting Mathematica write ...
3
votes
2answers
73 views

Most efficient way of splitting a file into length-prefixed blocks

Let's say I have a really big file (>100MB) that consists of length-prefixed blocks, i.e. the first byte of each byte block indicates the length of the rest of the block. This is a simplified example ...
0
votes
1answer
30 views

Export array data into a file

I tried to solve some equation for different values of parameter t and put results into array. Then I wanted to write this data into a txt-file. So i did it with ...
1
vote
1answer
39 views

Searching if a directory exists within a folder

I hope this question is not a duplicate, but I could not find any other question which answered my specific question, which is: I have the following folder structure (just an example): ...
0
votes
1answer
32 views

How to get only the directories (not the files) inside the current directory? [duplicate]

FileNames["*"] lists all the files and directories inside the current one. How can I list only the directories?
1
vote
1answer
36 views

Can i change the default search paths?

When i try to load packages on this computer, i get an error (i already know the packages work). I think the issue might be to do with the fact that mathematica can't process the network drives, some ...
2
votes
1answer
61 views

Code reuse between files in the same directory

At the moment, I am producing various complicated interactive plots. They all share a common "code base", with modifications on top of it. I would like to refactor my code so that the various files ...
0
votes
0answers
25 views

Can't Load .rst file

I've been working with the FeynRules 2.1 package in Mathematica 10. If I download the MC4BSM_2012 FeynRules files and run the Mathematica Notebook I've got no problem in Ubuntu (A lot of warnings ...
6
votes
2answers
91 views

Error when implementing StartProcess[] in loops (Do, While, Table)

I'm using Mathematica to control another program (Surface Evolver) through the terminal (ie using StartProcess[]; and ...
2
votes
2answers
127 views

Adding NotebookDirectory to $Path when notebook opens

I'm trying to get relative notebook paths work without evaluating $Path = Append[$Path, NotebookDirectory[]]; each time I open a notebook. A bonus would be to keep ...
1
vote
1answer
75 views

How to evaluate the same code in a whole bunch of existing notebooks

I have a large folder of existing notebooks, each currently containing a single cell of input. I would like --- in each of these notebooks --- to evaluate that cell, evaluate a new chunk of code I've ...
2
votes
1answer
54 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 ...
3
votes
0answers
30 views

how to make SaveAs saves to NotebookDirectory[] instead of NotebookBrowseDirectory[]?

I find Mathematica handling of directories utterly bizarre to say the least. I end up losing changes and seeing files saved in wrong folder due to this. Even in Version 10.01 which I am using, on ...
4
votes
2answers
191 views

How can I import and split lines with ASCII separator?

This is my data file, each line was separated by SOH, maybe hex \x001, I've tried some options of ...
1
vote
1answer
96 views

ReadList can't read “.csv” data with correct line number?

Well, the problem was solved today. Since "testAll.csv" is generated by Java/Eclipse, and I noticed that the LineSeperator is ...
11
votes
3answers
449 views

Visualizing directories

How do I plot the content of a directory and all its subdirectories into infinity using TreeForm? I've tried using a mix of ...
0
votes
2answers
64 views

File Handling. How to save the progress in a file?

Assuming I already have the file created. I have a programme that,returns an output, in our case number. I want Mathematica to save this number in a file, together with results saved from previous ...
11
votes
1answer
128 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 ...
4
votes
2answers
85 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 ...
2
votes
1answer
34 views

Put/Get don't accept a string-valued expression as filename [duplicate]

I'm trying to do the following with an expression: filename=StringJoin[{"myfile", ToString[someNumber],".m"}]; expression >> filename; But mathematica ...
0
votes
0answers
68 views

How to automatically Import, Name and Export multiple images? [duplicate]

Sorry for the very basic question but I'm really new to Mathematica. I have a directory(myDataDir) full of images (myImage1.tif, myImage2.tif...) I have a piece of code (let's call it ...
3
votes
1answer
263 views

How to change the start path of SystemDialogInput

It seems that every time the start directory of SystemDialogInput is always the same, is it possible to set the start directory to the last used directory? For ...
1
vote
1answer
103 views

Copy/Pasting code that contains double quotation marks leads to broken code [duplicate]

Sometimes, when copy/pasting code that contains a string (double-quotes around it), the copy of the code fails to evaluate. For example, the original code ...
1
vote
0answers
46 views

SemanticImport::unexpinvaliderr error when using trial version

I am trying to use SemanticImport for a personal experiment. I can correctly import a tsv file from a path, but if I change ...
3
votes
1answer
119 views

How does Mathematica use system environment variables?

Is there a common way in which environment variables are accessed, stored, or used by the kernel? There are built-in functions for querying and setting vars in the system environment, but there are ...
1
vote
2answers
95 views

Change Temporary Directory

How to change the value of $TemporaryDirectory ? I need to change it because there is not enough space on the C drive and the calculation seems to stop after a while !
9
votes
0answers
70 views

Is there a way to stop Export if the file size is too big?

I've got code that's exporting a file, but the file might be so big that it will take up too much space on the cluster I'm using and crash other users' processes. Is there anything like ...
7
votes
1answer
119 views

why CopyFile cannot overwrite existing file?

CopyFile return $Failed when the file exists on destination. is there any way to force CopyFile to overwrite the existing one? the way I use now is DeleteFile and ...
2
votes
1answer
55 views

What's the complete list of file name extensions used by Mathematica?

What's the complete list of file name extensions used by Mathematica? The ones I know are Before V8 .m .nb .mt After V9: ...
0
votes
0answers
33 views

How to get the subdirectory of a ftp weblink?

For example, I can use FileNames["*",dir] to get all subdirectory under dir if dir is some directory of my local computer. Suppose that I want to get all ...
1
vote
0answers
38 views

Default starting location of “Save as…” dialog in OS X [duplicate]

In the answer to this previous question, user Szabolcs says On OS X (I'm using 10.9 and Mathematica 9) the file chooser dialogue will remember the last location you used. So if you Save/Open ...
4
votes
1answer
132 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. ...
1
vote
1answer
43 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 ...
3
votes
1answer
44 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
55 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
53 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 ...
0
votes
1answer
59 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
59 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 ...
15
votes
1answer
183 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, ...
5
votes
2answers
169 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 ...
2
votes
2answers
137 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: ...
4
votes
1answer
149 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 ...
3
votes
1answer
116 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
70 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 ...
5
votes
1answer
311 views

Mathematica 10 doesn't support path containing Chinese characters

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 into front end. I got path like ...
-1
votes
3answers
92 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
189 views

How to set an absolute path name using SetDirectory?

I tried the following: Directory[] /Users/John SetDirectory["Library/Mathematica"] ...
0
votes
1answer
103 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 ...