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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5
votes
0answers
32 views

Is there a way to use iframes in a notebook?

For me, mathematica online is totally unusable, but the EmbeddedServices would be great to use. I wish that these functions worked in Mathematica, is there any hack anyone can think of to get these ...
3
votes
1answer
75 views

How to Import a password protected Excel (XLSX) file?

I have a password protected Excel (XLSX) file that I would like to Import into Mathematica. Is there a hidden option in Import ...
6
votes
1answer
75 views

Reading data from Google Docs

I am working on a personal project involving a CloudDeploy[ ] that reads data off a Google Doc and then works with it. Ideally, the Google Doc is either a text document or a spreadsheet which contains ...
2
votes
1answer
61 views

How to validate an XML file against xsd in Wolfram language?

I am planning to write a package to read data which is saved in XML format that should follow some XML schema. As part of the reading I would like to do error checking, namely schema validation. So is ...
4
votes
2answers
72 views

Excluding Specific Rows Using Import[…]

As the question states, I'm trying to import a .csv file but I would like to exclude certain rows (points which I know are bad data). This is easy when the points ...
1
vote
1answer
51 views

Non-ASCII characters in txt file can't be import correctly by Mathematica10

I'm using Mathematica v10.0.2 on Win7. I have a text file in which there are some Chinese characters and I would Import the file into Mathematica as a string by: ...
0
votes
1answer
67 views

Importing .AVI to mathematica and frame extraction

I'm trying to import frames from a video with the extension .avi, using this piece of Mathematica code: Import["video.AVI", {"Frames", {5, 6}}] But I get this ...
2
votes
1answer
151 views

Classifying images in mass with URLs and CSV file

I'm looking to train a image classifier with a large number of examples and categories (30,000 & 100). I would then import a file of image URLs that need to be classified, and export the results. ...
6
votes
1answer
167 views

Import another Notebook as if it were a Package

Is it possible to import the contents of another (existing) notebook into the current namespace in the same way that I can with a package? I know that it would be best to use a ...
2
votes
3answers
147 views

Importing a VCF file with quoted-printable encoding

The documentation has an example importing a VCF address book file which works fine: Import[ "ExampleData/wolfram.vcf" ] {{FormattedName->Wolfram Research, ...
0
votes
0answers
34 views

What does copying Output cell using Copy As > Plain Text actually does? [duplicate]

So, an input cell after evaluation gives an In[X] := str1 = ... Out[X]:= .... If I right click on the right edge of the Out[X]'s cell, and select Copy As > Plain ...
1
vote
1answer
76 views

Getting raw data using DcRaw

I'm using dcraw program to import raw image data to Mathematica. When I use Run["dcraw -4 -D -T "image.nef"] (which converts it to an unprocessed linear TIFF file) ...
0
votes
0answers
37 views

load NOAA ENC s-57 chart?

Is it possible to load a NOAA ENC s-57 formatted nautical chart into MMA 9.x? Particularly in MMA9.x within the MAC OS? -There does not appear to be any discussion of importing nautical charts ...
4
votes
2answers
73 views

importing a 150 MB .wav crashes Mathematica

rawdata = Import["rawdata_10min.wav"] crashes Mathematica when the file is 150 MB, but does not crash Mathematica when the file is 20 MB.
2
votes
2answers
588 views

How to Flatten and stack Efficiently 50000 Images

I have 50000 grayscale images with 56*56 pixels each one. I need to flatten images and stakck it in the same array with dimensions 50000*3136 after that export the file as .CSV. I am doing this code ...
1
vote
1answer
66 views

How to interpret and extract the information from the JSON (JavaScript Object Notation)? [closed]

How to interpret and extract the information from the JSON (JavaScript Object Notation)? I would extract the information and plot the information graphically. Please advise and comment. Thank you. <...
3
votes
1answer
35 views

Skipping commented in a stream from OpenRead

Is there a solution to skip comments in text files that are imported with OpenRead? I know there are solutions for Importand <...
0
votes
1answer
45 views

How to analyze a large wav file?

I have a large wav file (100 Mb). Any operation on it is time consuming. For example, to Import it takes about 1-2 minutes. The next step seems to be to figure out how it is encoded, since WAV files ...
0
votes
2answers
90 views

How to make a graph form imported spreadsheet data [closed]

I've three csv files: v.csv for vertex data, like this: 1 2 3 ... e.csv for edges: 1,2 2,4 2,24 3,1 ... and vcoor.csv for vertex coordinates: 23.4, 35.2 23.4, 40.3 ... I know how to construct a ...
2
votes
2answers
111 views

Change bond cutoff distance when plotting .xyz files

When plotting a molecule from a xyz data file, Mathematica automatically adds the bonds between the atoms. But in my case it adds too many bonds, not only between nearest neighbours but also between ...
1
vote
1answer
94 views

Cannot import PDF with JPXDecode or JBIG2Decode Filters?

I am trying to what I think should be a very basic thing, which is to import a large PDF from my files into Mathematica. The long term goal is to extract images from the PDF. The original command was ...
0
votes
1answer
59 views

Combining first 5 columns from CSV file into AbsoluteTime date

Thanks in advance for all your help. I need to import data from a CSV file that looks like : (easier to read in excel) I would like to convert the data into timestamps by creating a Table with 2 ...
0
votes
1answer
51 views

Improving performance Importing Table

I am currently working on mathematica script on a Raspberry Pi, which will periodically (10 secs) be launched by a bash script. However the runtime of my script really isn't the best. It's actually ...
2
votes
0answers
89 views

Using SHP files to draw a density map [closed]

My SHP file of census block groups has polygons and associated employment data for each block group. Is there a simple way to draw an employment density map? I've played around with ...
7
votes
2answers
247 views

Extracting and displaying data from GW150914 hdf5 files

Has anyone looked at the LIGO data using Mathematica or know how to do this? I'm not familiar with the hdf5 format but I've been able to import the data, consisting primarily of 131,072 floating ...
3
votes
2answers
105 views

How do I run 1-855 data points( imported from excel sheet) into a formula to obtain value for each data point?

I am very new to Mathematica and I just couldn't figure out the solution for the following problem. I have two columns in an Excel file. I have imported the 1st column as ...
1
vote
1answer
79 views

How to get missing lines from a file? [closed]

Let's say I have this file dat.csv which basically is a number of strings like that: animal horse duck dog plant tree grass sunflower sky oxygen nytrogen air ...
0
votes
2answers
56 views

Assigning columns of data from a file to variables extracted from headers

I'm very new to Mathematica. I want import a file in which the first colum is a function f1, the second another function f2. So the file looks like this: ...
2
votes
1answer
66 views

Order of importing data from files

I have many text files numbered from 1 to 1 million in numerical order. Within each text file is 5 columns of data (TAB spaced) with many rows. I effectively want to take the minimum value from each ...
1
vote
1answer
101 views

Export the coordinates of STL object

Hi I currently have a STL file of a 3D object Is it possible for me to obtain the coordinates of the object so that I can just input that into Autodesk Inventor
0
votes
1answer
75 views

How to convert this .txt data into a list of points [closed]

Question How to import data from a .txt file into Mathematica and convert it to an expression? Download the .txt file here (click download): http://pastebin.com/2NW2DfiE
3
votes
1answer
71 views

Reading an exported List

I have exported a list of 2d coordinates as a List: Export["F:\\coordinates.dat", coordinates, "List"]; You can access the ...
0
votes
1answer
76 views

Applying a formula to the data in several files [duplicate]

I am calculating with the depth data recorded in a number of files with extension .log. The depth data is like this and I loaded it by means of Mathematica: ...
1
vote
0answers
42 views

What is a good way to import interpolating functions of large size? [duplicate]

I was generating a set of eigenfunctions from a differential equation using NDEigensystem. Because of the computer time cost is too high, I thought it'd be better ...
2
votes
1answer
52 views

read Python-generated data file

I've read similar-but-not-quite-the-same questions : I have to read a python-generated data file which contains complex numbers. So, the numbers appear as (real+imag j). And of course Mathematica ...
0
votes
1answer
82 views

Importing $\LaTeX$

I have a LaTex file, and import it this way: tex=Import["texfile.tex"]; Now according to Help, this returns a notebook expression: ...
2
votes
1answer
239 views

Import 'file not found' error. Why? [closed]

I'm trying to import a file, and for that I'm using the following code: ...
1
vote
1answer
50 views

Trying to get simple excel data to be imported as a social network directed graph

My data has two columns that we'll call A and B. The columns proceed as such A B A1 B1 A2 B2 A3 B3 .... I'm trying to make this into a directed graph where A1 has an outgoing edge to B1 and ...
2
votes
2answers
264 views

Follow each pixel brightness in set of images (Memory constrained)

I have a set of 2700 consecutive png images (8bit, 2048*2048 pixels). I would like to visualize the intensity variation of each pixel vs. image number. Here is an example of 10 images: http://goo.gl/...
-1
votes
4answers
178 views

Import vs ReadList CSV file with Currency Values

A testing file with the specified format can be downloaded from here Let's read a few lines from this file ...
5
votes
2answers
266 views

Max of imported numerical data will not work

I loaded a list with 400,000 values from a file. The list was loaded correctly as I can get it's length (by Length[]) and I can also plot it. Why can't I get the Max or Min of this list though? When ...
5
votes
1answer
113 views

ReadList ignore comment lines?

Is there a way to make ReadList ignore certain "comment lines" (say, all lines that start with #, or in general all lines that ...
5
votes
0answers
81 views

why does ReadString[“fname”,term] open a persistent stream, and how to close it?

Bug introduced in 10.0 and fixed in 10.3.0 Create a file temp.txt with the following content: test1 ;;; test2 ;;; test3 ;;; ...
5
votes
0answers
122 views

WDF specification?

Motivated by a recent question on the meaning of all sorts of W* acronyms, I would like to get more information about the Wolfram Data Framework (WDF). On its web page http://www.wolfram.com/data-...
1
vote
2answers
125 views

open Matlab sheet and plot

I have managed to import my data into mathematica, but I can't find a way to show the plot the way it was in the lab (Matlab automatically generated file usually show me a graph). Is there a way ...
4
votes
2answers
227 views

How can I encrypt/decrypt a directory?

I'd like to use Mathematica 10's new Encrypt and Decrypt functions to secure files and folders on my mac. Here's what I have so far but something goes wrong along the way, since by the end of this ...
1
vote
0answers
67 views

Import Excel data from within Manipulate

I am processing a set of data using Manipulate, as I need some user input as well and the whole code must be delivered as .cdf . The set of data should be imported from an Excel file which is selected ...
4
votes
2answers
247 views

How to import 12-bit TIFF image

I have a CMOS camera which records images at 12 bit resolution. The camera software allows to save them as 12-bit TIFs. However, Mathematica cannot import this: ...
4
votes
1answer
96 views

How to get sub property from json result?

I'm brand new to Mathematica and I imported a json: data = ImportString["{\"x\":1,\"y\":1}", "json"] and result: ...