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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1
vote
2answers
41 views

Deleting a line from a file

I'm writing a Mathematica script that writes output to a file every 10min as backup. However, I'd like it to overwrite the previous content so as not to use to much storage. Is there a function for ...
2
votes
1answer
37 views

SetDirectory[NotebookDirectory[]] in one notebook causes Directory[] to change in a different notebook

This is causing me lots of problems. I found that issuing SetDirectory[NotebookDirectory[]]; in notebook A.nb causes subsequent ...
4
votes
1answer
42 views

How to define a function to save a list to a same-name file

I want a convenient way to save lots of intermediate data lists into files, so that next time the files can be imported automatically to homonym list variables in the notebook, without having to ...
2
votes
1answer
134 views

Writing/exporting files outside the Raspberry Pi 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 ...
0
votes
1answer
72 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?
0
votes
1answer
56 views

How fix backup command?

The following old code, from "Dr Bob" and Selwyn Hollis with a minor modification by me, produces a palette that allows one to create successive backups to the input notebook. But the code breaks in ...
0
votes
1answer
46 views

Is there the possibility to write many times a value in definite list of file1.nb?

The commands testData = RandomReal[{0, 1}, {1, 1}]; Export["C:\\Users\\Alex\\Desktop\\1\\file1.nb", testData]; write the “testData” (value generated by ...
0
votes
1answer
69 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 ...
0
votes
0answers
66 views

Privilege Violation

I am working with a file that is about 400Mb. The intent is to read in the information, transform the data and output to a new file. Before writing to a new file, the directory is checked for an ...
8
votes
4answers
140 views

Handy / flexible directory tree operations

Is there any shorter / more handy / more flexible way to get directory tree as a nested Rules/Associations list? I tried to incorporate ...
15
votes
3answers
2k views

Relative paths for portable notebooks in Mathematica

I cannot find how to use relative paths in Mathematica. My directory structure is simple. ...
6
votes
2answers
235 views

Why does the hash of a file differ from the hash of its content?

FileHash doesn't allow arguments like FileHash[file,{"CRC32","MD5"}]; A solution could be: ...
2
votes
1answer
135 views

Binary file gymnastics

I have an unformatted binary file generated by fortran 77 and i want to import it in Mathematica. The file is formed by 5 data arrays with double precission float numbers. The problem is that seems ...
1
vote
3answers
210 views

How can I use functions in file paths?

I'm very new to Mathematica and I'm trying to write into a file. I want to have a function in my file path. For Example: ...
4
votes
0answers
37 views

Odd behavior of FindFile

Running FindFile gives some odd results on my machine: FindFile["HTTPClient`"] Result: ...
8
votes
1answer
214 views

Prevent Export from overwriting files

Export["filepath1",Expression1] works for me, but if filepath1 already exists, it will be overwritten. I'd like ...
0
votes
1answer
41 views

How to output matfiles in Mathematica?

I am new to Mathematica, if there is anything wrong, do not hesitate to tell me? ...
3
votes
1answer
113 views

How to make new line in mathematica file output?

I know that new line is classically made by "\n". I want to make a string with lines of data and then export it into a file: ...
1
vote
3answers
1k 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 ...
13
votes
1answer
166 views

How to get the directory of a package?

I have a package that I have placed in the $BaseDirectory\Applications directory so that Needs can find it. I have a logo in ...
4
votes
1answer
57 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 ...
0
votes
2answers
58 views

What does CreateDirectory[] return?

Based on: CreateDirectory returns the full name of the directory it creates, and $Failed if it cannot create the directory ...
11
votes
1answer
244 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 ...
0
votes
2answers
69 views

Get a filename used in an import and store it as a variable

Hopefully a simple one for you (or at least seemingly)! I import a .txt file, from which i make a ListLinePlot. I simply want to read in the name of the file, store it in a variable so I can use it ...
7
votes
1answer
411 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 ...
4
votes
0answers
55 views

How to force the writing of buffers onto disk?

Usually, buffering is good; except when you critically need to write data to disk. Is there a way to force the writing of buffers onto disk? (I'm using a binary file) I believe a ...
17
votes
0answers
226 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: ...
3
votes
2answers
85 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 ...
1
vote
1answer
51 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): ...
1
vote
1answer
48 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
74 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
30 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 ...
7
votes
2answers
112 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
143 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
85 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
57 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 ...
4
votes
2answers
218 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
118 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 ...
13
votes
3answers
477 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
79 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 ...
12
votes
1answer
180 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
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 ...
2
votes
1answer
39 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
95 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
319 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
147 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
57 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
147 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
109 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 !