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.
7
votes
2answers
137 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
70 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
42 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
124 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
2answers
139 views
How to split a file?
Is there a way to split an external file using Mathematica? (Other than importing it, dividing it internally and exporting the parts)
For instance like some File Split utility do.
5
votes
1answer
83 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 ...
14
votes
4answers
329 views
ReadList problem related to Record type
A simple file reading issue is baffling me here. I am reading a around 200 MB textual file in .dat format. Now the file contains many lines but to phrase my problem ...
-2
votes
1answer
89 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 ...
10
votes
5answers
214 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
76 views
4
votes
0answers
64 views
Accessing files in different directories [duplicate]
I have a problem that I am trying to work on. My Folder structure is like this.
Application(MainDirectory)
AppData( Secondary directory where files are Design.m, Layout.m, and Evaluation.m)
...
1
vote
1answer
148 views
Renaming files of form FileName(i).csv to NewNamej(k).csv where j increments and k resets to 1 when there is a jump in i?
Edit up top: The accepted answer works splendidly except I had to add //ToExpression to the end of the definition of ns given by ...
7
votes
3answers
292 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 FileNames, StringSplit and GatherBy but in the end I couldn't find even a ...
0
votes
0answers
89 views
Do Import and Get work asynchronously? Can I prevent this?
I'm getting strange behavior in some of my notebooks that makes it seem like Import and Get load asynchronously. When I evaluate ...
4
votes
1answer
112 views
Execute code when file is modified
I have a function the takes some time to complete. The function imports data from a .csv, parses it, and plots certain vectors from there. The .csv is constantly being updated from an external ...
65
votes
1answer
2k views
File-backed lists/variables for handling large data
Background
Currently I am working with some large data (most of it generated by Mathematica itself). I usually find it a hassle to do this. For example, I just exported a large amount of data to ...
1
vote
0answers
135 views
How to set default save directory for notebooks?
Based on certain previous questions, I figured that if my NotebookBrowseDirectory looked like this
...
6
votes
4answers
223 views
How to batch rename a directory of files?
I have a directory of files with the pattern: "some_number.some_name.pdf"
I want to remove the "some_number." part from all the ...
2
votes
1answer
95 views
Restrict SystemDialogInput to open certain file types
The documentation for SystemDialogInput shows how to restrict the types of files shown.
SystemDialogInput["FileOpen",".nb"]
...
3
votes
1answer
87 views
Manipulate and FileNameSetter don't want to play nice together
In a Manipulate, one can specific the type of an individual control like so:
Manipulate[v, {v, Red, ColorSetter}]
I tried to ...
5
votes
2answers
131 views
How do I Export through a standard system file save dialog activated by a Button?
As near as I can tell, Export cannot be configured through arguments or options, to present a standard system file save dialog to the user, so that he can specify a ...
35
votes
3answers
551 views
How can I set up a versioning system within a notebook?
Since the Frontend crashes a lot, for important work it would be nice to have the notebook automatically branch and save itself every so many minutes.
For instance, commands like ...
0
votes
1answer
133 views
4
votes
1answer
155 views
Open data file from CDFPlayer?
Using a CDF program running in CDF Player, is it possible to use a system dialog box, or even just an Import statement such as Import["*.CSV"], to import data from a text or comma separated file on a ...
0
votes
1answer
164 views
SetDirectory - predefined directory possible? [duplicate]
Possible Duplicate:
Relative paths for portable notebooks in Mathematica
I have a deep subdirectory structure, and the calculations should always be done in one of the deepest ...
-2
votes
2answers
319 views
How to write output in TraditionalForm into external text files?
I'd like to write output in TraditionalForm into external text files ofile.txt. I tried to use
...
24
votes
1answer
305 views
Tool to locate bloat in a notebook?
In developing a notebook, I often find I have created a very boated file that takes a long time to save. I would like to slim it down. It is usually the result of graphics and images, but they may be ...
9
votes
2answers
194 views
How to search a file in a particular system using Mathematica
I want to know if there is any function which can search a file from the whole system and gives the whole path for that particular file. I have tried $Path but it ...
8
votes
1answer
109 views
Drag & drop path info into front end?
On OSX at least, it's possible to quickly retrieve a folder/file path by dragging & dropping the folder/file into the terminal, eg:
Is it possible to program Mathematica's front end enable ...
4
votes
2answers
164 views
Importing array with complex numbers
This is probably an easy question: I am exporting the results from a longer calculation into a dat-File, then I set the cell to non-evaluatable and put an Import in front, so I can later work with the ...
6
votes
2answers
325 views
How can I open an Excel file and modify it in Mathematica?
I wanted to ask how can I view an Excel file from a Mathematica notebook and modify it.
I have seen a similar question, Open Excel file with Mathematica, but the answer involves .NET. Is there any ...
1
vote
3answers
421 views
How to write values of function to file?
For example, say I wanted to plot Sin(x) like this:
Plot[Sin[x],{x,0,2 Pi}]
But instead of plotting to a graph, I want to now tabulate the values of Sin[x] to a ...
9
votes
2answers
251 views
Mathematica “prelude”
Is there any way to have the functions from a mathematica file be loaded on startup?
For example, in this excellent answer, Jens helps me out and gives me some functions for creating legends for ...
6
votes
1answer
143 views
How to save data using FileNameSetter or similar
I would like to export data to a file using a SaveAs type dialog, using something like FileNameSetter[name,"Save"] to give a browse button.
Any help with this ...
5
votes
2answers
222 views
How to remove an expression from a file?
To read in expressions from a file, one can do ReadList[file, Expression, 3]. How to do the opposite, i.e. remove a number of expressions from a file, modifying ...
8
votes
1answer
513 views
Relative paths for portable notebooks in Mathematica
I cannot find how to use relative paths in Mathematica. My directory structure is simple.
...
3
votes
2answers
148 views
How to check which file is older
Is there a command in Mathematica to check the date when a file was last modified? Suppose I have two notebooks: File1.nb and ...
13
votes
3answers
473 views
List all the directories under the current one
I feel like I am forgetting something obvious, and will remember or be ashamed as soon as an answer turns up. However, I cannot for the life of me get all of the directories in the current working ...
