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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0
votes
1answer
103 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 ...
11
votes
3answers
150 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
79 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
145 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
194 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
172 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
167 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
172 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
176 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
158 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
182 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
121 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
73 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
195 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
88 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
175 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
146 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
73 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
71 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
143 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 ...
2
votes
1answer
103 views

Why is FileNameJoin not working?

I can not figure out why the code below doesn't work? aaa >> FileNameJoin[{Directory[],"input"}] error message came out saying OpenWrite::noopen: ...
6
votes
2answers
273 views

Using Read for calling external command does not release file handle

The standard and robust method for piping to/from external commands under Windows is to create a temporary file, save the input into it, pipe it to the command and save its output to a second file. ...
0
votes
1answer
81 views

Configure initial directory

How can I configure the initial directory? By configure, I mean set it so that when Mathematica starts the initial directory is one of my choosing. By the by, what exactly is the significance of the ...
2
votes
1answer
82 views

File output and race conditions

Is it possible to know when Mathematica is done writing a file? I'm looking to automate something and I'm wanting to have Mathematica put it in a file using Put[], ...
0
votes
1answer
144 views

String to File removing quotation marks

If I print a string to a file it also adds quotation marks to the string. Here is an example: a = "test \t test" a >> file FilePrint["file"] How can I ...
9
votes
2answers
1k views

How to place cdf file in Microsoft Word, Powerpoint or in interactive PDF file?

I would like to create a presentation for my lecture in which I would use Mathematica CDF files. Let's say I want to have such interactive content: ...
3
votes
3answers
152 views

Properly ordering the output of FileNames for a directory consisting of files with consecutive integer names [duplicate]

Say I have a number of files in a directory at some location (C:\dir1\dir2\dir3...), and I pull an array of strings corresponding to the file names with the command: ...
7
votes
1answer
194 views

Name of current Notebook

I've searched the documentation, this forum and with google, but I was not able to find how to ask Mathematica to give back the name of the current notebook file one is working on. Perhaps something ...
1
vote
2answers
78 views

Export with different address

Is it possible to use the Export[] command and add another address other than the usual Home directory that is used?
2
votes
0answers
36 views

Using a variable in Get [duplicate]

This question is different from the answer here Infix form of PutAppend ( >>> ) does not work with variable becasue it is dealing with folders and not filenames. I have a file path which I ...
10
votes
1answer
212 views

Infix form of PutAppend ( >>> ) does not work with variable

I'm new to Mathematica, so I suspect this question involves either a misunderstanding involving variables or the usage of >>>. On a webMathematica page ...
5
votes
1answer
172 views

How to trash files / directories?

Both DeleteFile and DeleteDirectory can only delete files / directories, and lack the option to move them to the trash. Is ...
6
votes
2answers
140 views

How to resolve a Unix symlink?

Does Mathematica have any function to resolve a Unix symlink (recursively, if necessary) to its real path?
4
votes
2answers
136 views

Equivalent of __FILE__?

Many languages define a special identifier whose value is the path to the source file currently being processed. (For example, in C, this is done through the ...
1
vote
1answer
91 views

Techniques To AutoReplace Browse

Let's say I have a function of the form. Test[File_,text_] What would be the most automated way and flexible way to generate an input cell of the form, such ...
1
vote
0answers
75 views

ReadList with type Expression unable to read scientific notation? [duplicate]

I have a file that defines an array of numbers like this: freq["AQs"] = 8.846947803007962E-4 ... I am reading the file with ...
3
votes
1answer
245 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 ...
3
votes
2answers
622 views

Importing data into an array, column by column

I'm building a large matrix having different sized rows consisting of a few columns. The different columns are imported .txt files. Why can't I build the matrix column by column? For example, I ...
2
votes
2answers
431 views

Combine multiple notebook files into a pdf/rtf/word/etc file?

It's the end of the semester and I have a prof who wants me to turn in a printout of the nb files ive worked on. I have 33 separate files, and I was wondering if there was any easy way I could combine ...
15
votes
2answers
184 views

How to find the package file that stores a certain symbol?

Is it possible to figure out in what file a certain packaged symbol lives in (assuming there is no shadowing between multiple identical symbol names)? I would like to have a function that if, given a ...
7
votes
2answers
380 views

Using NotebookDirectory in batch-mode

I am running Mathematica via the terminal (Linux) and my .m-script contains the command: ...
11
votes
2answers
608 views

DumpSave for the forgetful

A few weeks ago I created a big matrix, and in order not to have to recreate it, I stored it using DumpSave["file.mx", variable]. Now I want to read it back in and ...
4
votes
2answers
162 views

Cusom PopupMenu file selector

Lately I come across what I think not uninteresting problem which is a good exercise for the usage of Dynamic. Assume you have files in a directory structure (a ...
0
votes
1answer
184 views

Pop Up for Setting directory path

I am trying to build certain modules in Mathematica 9. I want it to dynamically ask for the directory path ( like file explorer ) when the code cell is executed. How can I do that ? ...
3
votes
0answers
384 views

Cannot save file

Hello I have a problem in saving files in Mathematica. I can't save not only notebooks but also figures. When I choose to save the notebook it open a window that says: Mathematica could not find ...
5
votes
1answer
96 views

What happened with the file?

What happened with this file? infile = "\\test data.txt"; outstr = OpenWrite[infile]; instr = OpenRead[infile]; Read[instr, Record]; Close[instr]; All ...
4
votes
1answer
364 views

Doubts on scripting: error messages when trying to run and how to process lots of files

I have created my first mathematica 'program' as I think of it, to do some image processing. After reading in an image, it does a lot of stuff (including smoothing, fourier transform, functional ...
-2
votes
1answer
122 views

How can I check which file is modified in specific directory?

I want to find which files are recently modified in a specific directory. For this purpose, I wrote a function named Test. The function's argument is ...
13
votes
5answers
526 views

Using ReadList and Skip to read a file with periodic alternation of useful and useless data

I am trying a read a file that's arranged such that there's alternating set of rows containing data that I don't need and data that I need. So for my case the first n lines in the files are useless to ...
-4
votes
2answers
278 views

How to output Mathematica Lists as a Table to a file?

Given the following List: ...