Questions about getting data, files, images etc. from various formats into a form that can be read, tranformed and manipulated by Mathematica

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1answer
41 views

How to import data from a .mat or a .txt file and manipulate dimensions

I'm new to Mathematica (I know very, very little - so I apologize if anything I say is absolutely wrong) - but I'm trying to upload a file from matlab and arrange it in matrix form. I have a .mat ...
1
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1answer
53 views

Read a compressed ascii data file?

I would like to write a filter for Import to handle data files that are generated by LabView in the LVM format. This should be straightforward, since the format is ...
3
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1answer
46 views

How to force Mathematica to interpret a file as HTML?

Some web pages do not explicitly contain the file extension "html" but is formatted that way (like this one). If I saved this page to my computer then Mathematica could parse it correctly. But if I ...
1
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1answer
54 views

How to scrape image search engines?

I'd like to download highest resolution images possible from the search results like these: ...
0
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1answer
52 views

Import mixed graph from Excel

I am new to Mathematica. I want to use the software as it allows analysis of mixed graphs (directed and undirected edges). I have my network as an Excel spreadsheet of three columns: source, target ...
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2answers
49 views

How to import website data which has an unknow format? [closed]

I want to import data from this website: http://hq.sinajs.cn/list=sh601006; It should look like ...
1
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1answer
56 views

Make animation with multiple external data files

I am currently solving PDEs for a discrete vector field with C++. The output at a time t is an array where each row represents a site and there are 6 columns, the first 3 give the position of the site ...
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0answers
37 views

Is it possible to import Matlab “.fig” files in Mathematica?

Is it possible to import a ".fig" file made in Matlab into Mathematica? If I try the usual Import[filename] it produces an error ...
0
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0answers
31 views

Copying an Imported List to another File

I have a file which begins with a large list of elements created by joining 12 different data imports, which I would now like to copy to another file so that the file can be sent by itself and not ...
0
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1answer
55 views

Mathematica: issues storing nested list on disk

having trouble with mathematica using nested lists. I want to save a list like this: l1={{a1,{a,b,c,d,e}},{a2,{f,g,h,i}}} So, the nested components do not have ...
1
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1answer
41 views

Importing files into mathematica from flashdrive

I don't know why I can't get my files to import from my flashdrive into my notebook. I have .mat files and .cvs files. I've tried this ...
0
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1answer
34 views

Import and export without changing number format

I have a complex file that is the output of a program. The file contains multiple columns with data in different number formats. For example: ...
0
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1answer
72 views

Union of large sets

I am trying to take union of thousands of set containing thousands of elements. However mathematica closes itself when I copy/paste the sets in Union[{}]. Do you ...
-1
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1answer
61 views

Function for importing and plotting data from excel spreadsheet

I know this must be a very basic question, but I could not find any answers. I need to create a function that: 1) imports data from an Excel Spreadsheet, 2) assign specific information from this xlsx ...
0
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0answers
46 views

Plotting stellar spectrum from FITS file

I would like to make a plot of wavelength v. relative frequency from the stellar spectrum data in a FITS file (in order to fit a curve to one of the spectral lines). I used ...
1
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1answer
51 views

How to import a file for processing but not for displaying? [closed]

Here's my problem, I want to take what I have now for code ...
4
votes
0answers
42 views

Import succesful when file manually deleted

apparently Import keeps an imported file i the cache and doesn't complain for some time if a file is deleted manually from the system and then it is imported. If the file is deleted from within ...
0
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1answer
35 views

Reading a .txt file with numbers

The .txt file is: tb_FeSe_22_12_2014.csv 0.00102786 (-0.000421863,1.58589e-09)(-4.04766e-05,2.67116e-07)(-8.4396e-06,-1.54976e-07) I would like to Import it to Mathematica such that I have: ...
2
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1answer
97 views

Mathematica doesn't read .mat file

To be honest, I don't know if the problem is with Mathematica, or with the file; it's been generated by PicoScope, a PC-based oscilloscope software, not Matlab. The error I get in Mathematica 9 when I ...
0
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1answer
37 views

ReadList and ToExpression

My dataset is like: id, feat_1, feat_2, feat_8, feat_9, feat_10, feat_11, feat_17, feat_18, feat_22, feat_2, target 1, 1, 0, 0, 0, 0, 1, 2, 0, 1, 0, Class_1 2, ...
0
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1answer
52 views

Import GEXF graphs into Mathematica?

Is there any smart way to import gephi graphs (*.gexf) into mathematica ? I mean other than converting to *.gml.
0
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1answer
62 views

Is there a better way to download images in parallel?

Is this the best way to batch save a list of image urls in parallel? ...
1
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1answer
84 views

Cannot import Excel (xls or xlsx) files which have non-ASCII characters in the name

It seems mma9 works fine, but with mma10 it fail to load a file name with Chinese characters. I use MacBook Pro(Retina) with OSX 10.10.2, and Mathematica 10.0.0.0. I need the file name with Chinese ...
0
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1answer
35 views

Import command gives different solution to equation than cut & paste

I would like to import values from a text file to run a notebook. The notebook works fine when I cut and paste in all the input values manually. Here is a working version. But when I import the same ...
0
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1answer
38 views

Cannot import data into a notebook as a list of numbers

I have text file with a list of numbers separated by commas, which I would like import into a notebook to be called when the name ratevector is used. If I cut and ...
0
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1answer
37 views

Working on a certain column after importing data from a file

I'm trying to import a file with 2 columns, in TSV format. Something like this: ...
5
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2answers
230 views

Why an extra { when importing .xls?

I am trying to import data from a file. If I import a CVS file, I get: {{a,b,c},{e,f,g}}. For example, two curly brackets. If importing from a .xlsx file I get ...
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3answers
102 views

Read data from file starting at a certain point

I have files of data that come with a whole bunch of junk in the beginning before the actual columns of data start. Is there any way to tell Mathematica to start putting the data into a table from ...
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0answers
34 views

Somebody imported .mdt files (3d graphics) in Mathematica?

Hello maybe someone did or import this format in math for subsequent presentation in 3D
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1answer
55 views

Getting error Import::chtype when mporting 2D array of images [closed]

Suppose I have images = {{1.jpg, 2.jpg}, {3.jpg, 4.jpg}} Now I try to import all of them at level 2, ...
9
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2answers
142 views

Inconsistent behavior of undocumented Encode->Import->StringToStream->Get on password-locked stream

Let's save a definition. Encode it with password/key and Get it again. We will not use Get ...
18
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3answers
1k views

Finding a function that fits the shape of an image

How can I find a function that fits the given shape of an image? Or instead extract a point set from the shape and then find an interpolating function fits the shape. An example image is attached.
2
votes
1answer
50 views

Import of data from ODS

With SetDirectory["~/Downloads"]; ifile = "test.xls"; TimeConstrained[idata = Import[ifile, {"Data", 1}], 5]; I can achieve the desired result of importing the ...
1
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1answer
70 views

How do I utilize the dynamic input field function in the manipulate function? Can I use this functionality to import a .xls from an URL dynamically?

Im trying to get my program to import a .xls for manipulation, I need to import the .xls at an url location dynamically, I did have this at the beginning of my code: ...
5
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1answer
157 views

How to use Get on a folder

In the documentation for Get it says: If the file found by <<name is a directory, the Wolfram Language will try to ...
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0answers
30 views

Can I import (and repair) damaged GIS shape files?

Five GIS shape files are available online at http://www.utahcounty.gov/OnlineServices/maps/DataLayers.asp. Mathematica 10 imports 4 of the 5 files just fine (in the sense that, after download, ...
3
votes
1answer
97 views

How to correctly import data zipped with the “deflate” algorithm?

I'm writing an importer for the GIFTI file format. The details of the format are not particularly important, but the basic idea is that it is a relatively simple XML file which includes binary arrays ...
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0answers
19 views

import file from directory using sftp

I want to import a file from a directory on a ftp using sftp. I'm not sure how the command looks, but here is what I have tried (based on this older post): ...
0
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0answers
23 views

What are the limits to file size for Import[ file.wav,“WAV”]

What is the maximum size *.WAV file that can be imported into Mathematica with Import[]?? What is the code used to read the header of a *.WAV file?
1
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1answer
85 views

A bug won't let me import JSON files

I have been working on a project and I have been using JSON to build some networks, the code I use is: ...
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0answers
42 views

How can I run my API on an image?

I've built an API that takes a url of an image as an argument. Using Import[] I can easily call my API on any url and get the results... but I need to run it on an ...
3
votes
2answers
78 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
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1answer
82 views

Importing, sorting and exporting lists

I have several TSV lists (.txt) of something like 2000*2000 numerics (e.g. 1.8645) to import ...
0
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0answers
15 views

import part of data [duplicate]

I am using the following code for importing multiple files. ...
0
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1answer
76 views

Having trouble displaying imported Excel regression data [closed]

The plot points and residual lines are not showing, hard-coded data works, and imported data does do something, just not what its supposed to Is the table or the plot range the wrong size? I can't ...
1
vote
1answer
60 views

Export and Import a list of graphs?

I want to export a list of graphs that come as output to my program. However, I tried exporting all the graphs as graphs using Map and an Export statement with "graph.gml" statement, but got an error. ...
0
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2answers
47 views

import string to data

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0answers
33 views

How to import (from a table file) only rows with a specific element in a given position using Import?

I have a large file containing a table. To be specific, the table columns are aligned by spaces, and the rows are terminated by newlines. I want to import only specific rows from this table. For ...
0
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0answers
28 views

Code to import and export “.cine” image format?

I need to work with a set of experimental data in the form of ".cine" format image files. This is a data format developed by Vision Research for high-speed imaging and video. I would like to import ...
1
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1answer
42 views

Dynamic check box with import!

Here what i am trying to do: I have a list of the names of excel files, for example s={"red carpet.csv","red box.csv","black carpet.csv","black box.csv"}; i am ...