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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1
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1answer
81 views

Edit header information of a DICOM file and export it again

I have some DICOM files and want to edit a part of the Header and export the DICOM files with this edited header. I know how to Import a DICOM files and extract the Header Information, but how to ...
1
vote
2answers
164 views

Plot from data containing “e”

I have data as a "dat" file exported from matlab in this format: ...
1
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0answers
98 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 ...
4
votes
1answer
210 views

how can i associate the headings of columns/rows with content of itself and then recall what i want after i've imported the excel file in mathematica

Hello, i make another try... I have to import a file like this below (it is an excel file, i show you just the beginnig. it should have thousend of rows and columns). After i've imported the file i ...
0
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1answer
43 views

Import a 3D CSV file results in the wrong dimensions

I exported a some of my data to a file, the data looks like this before the export ...
26
votes
6answers
6k views

Cut and paste data from a spreadsheet

I have a set of data points in two columns in a spreadsheet (OpenOffice Calc): I would like to get these into Mathematica in this format: ...
19
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1answer
2k views

How to programmatically extract mathematical formulas from Word with Mathematica 9?

I have a bunch of(1000+) Microsoft Word document in .Docx format. How can I programmatically extract the mathematical formulas from MS Word using Mathematica 9? This is what example looks like (or ...
4
votes
2answers
141 views

Extract part of a matrix

I have imported a matrix from a .txt file (it could be better from an Excel file): ...
1
vote
1answer
94 views

How to import an external pdf file leaving text as text?

When Importing in Mathematica (v10.3) a pdf file containing some text, the text is "vectorialized", meaning that it does not seem to be loaded as text, and re-...
7
votes
2answers
3k views

When importing is it possible to set the delimiter?

When importing a csv file is there a way to set the delimiter. I have a csv that uses ";" as its delimiter. I tried ...
3
votes
2answers
131 views

Take a specific part of a matrix imported from a .xls

i would like to know if there are any ways to link headings of a table i had imported with the data in the table itself. I imported a matrix from an excel file and i want to take a specific part of it....
0
votes
1answer
126 views

how to import a matlab 3 dimensional array into mathematica

I have created a three dimensional array "data" in matlab by using the following commands : ...
0
votes
1answer
88 views

What´s wrong with my FindFit

I updated the data which is a table I deleted the first coordinate as it was the quote from the document. ...
2
votes
2answers
159 views

Applying transformations to data coming from an STL file

I am very new with the use of 3D graphics in Mathematica, so my question might be very naive. I need to Import an STL file, apply transformations to it (rotation and translation), and export it back ...
3
votes
1answer
185 views

Run Command Not Executing Node

How do I make the following command work in Mathematia? Import["!\"C:\\Program Files\\nodejs\\node.exe\" -p console.log('test')", "Text"] I don't get any output ...
1
vote
1answer
44 views

Medium-sized graph won't build

Why can't Mathematica import a 40-KB file (mediumEWD.txt) and build the underlying graph in some decent time? I waited a minute, nothing. ...
3
votes
1answer
108 views

Mathematica can't Import data of NetCDF file with Datasets name including “.”

I have downloaded NetCDF data file EVE_L3_merged_1nm_2015323_005.ncdf from http://lasp.colorado.edu/eve/data_access/evewebdata/products/merged/ and read it by Mathematica 10.0.2 on my windows 7. <...
1
vote
1answer
80 views

Downloading a number of images from a web site as a list

For a MachineLearning project I need to form a training set using images taken from the web page containing lots of them. Like, for example this one. It would be very convenient, if all the images ...
9
votes
2answers
210 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 ...
29
votes
4answers
2k views

How can I import a huge CSV file quickly?

I have two CSV files, each one is around 1 GB of data. When I use Import["file.csv"], it takes a very, very, long time to import the data. So how can I accelerate ...
1
vote
1answer
108 views

HDF5 file managing for dummies

I am new to HDF5 format and I am also not hundred percent confident with Mathematica. I have googled to find out examples to deal with HDF5 files in Mathematica but couldn't find one that work out for ...
11
votes
2answers
788 views

Google Image Search in Notebook?

How can I use Google's image API to custom search for images and import them all?
4
votes
0answers
78 views

File Formats for Scientific Data

I have a simulation written in another language which currently just dumps all its data (doubles, lists of doubles, lists of lists of doubles) in lines in ASCII, and then I read it into Mathematica by ...
0
votes
1answer
62 views

file import from website failed (Http status code 403 returned) [closed]

I failed import an xls file from website in Mathematica but got no problem to download it directly using chrome. Can anyone help me solve the problem? Thanks. The detailed situation is listed as the ...
4
votes
1answer
96 views

Importing large datasets using streams

I work with large data sets with 22 columns and up to a million rows. Each row contains one observation with several variables. All variables are numbers. Simplyfied example: 1, 1, 2, 3, 4, 5, 6,...
10
votes
3answers
132 views
10
votes
1answer
154 views

Is there an efficient way to load a large list to Mathematica from R within Rlink?

I'm working on something that involves using both R and Mathematica. For this something, I first generate a large R list (1000 matrices, each 200x1000, mixed integer and real values) and then need to ...
2
votes
0answers
127 views

Animate FromQuarternionTo3DRotation nb file with 4 quarternion values

I have a csv file. Inside the csv file, there are few rows of 4 quartenion values. I would like to animate the quarternion nb in http://demonstrations.wolfram.com/FromQuaternionTo3DRotation/ I ...
3
votes
0answers
104 views

Use of MuPad code into mathematica

Does somebody have experiences so as to transform a MuPad code into a notebook into Mathematica? I would like to export equations written in MuPad to Mathematica.
1
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0answers
69 views

Import using POST method and web-page drill down

A response to a previous question about invoking the POST method via Mathematica was most informative in trying to further understand the intricacies of using the POST Method to obtain tabular data ...
28
votes
3answers
2k views

How to manipulate web pages on Mathematica?

I wanted to input some data on this page through Mathematica. Then I would press the "buscar" button also through Mathematica coding and get the results on Mathematica. The most similar post I've ...
1
vote
0answers
36 views

How to test if Import was successful? [duplicate]

I am importing and processing a bunch of files. Sometimes, for whatever reason, some of these files are not successfully imported so I'm looking for a way to Abort ...
0
votes
1answer
135 views

Importing and manipulating data in HDF format

I have two matrices A1 and A2 in HDF format. I use the following code to import them. ...
2
votes
1answer
82 views

Extract arguments from MeshRegion created by STL import

I've been trying to extract points and polygons from a MeshRegion expression created by importing an STL file. At first I thought I could use a simple ReplaceAll as shown below: ...
9
votes
1answer
519 views

Mathematica doesn't read .mat file

Bug introduced in 6.0 and fixed in 10.2 (July 29, 2015) 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 ...
1
vote
1answer
99 views

Multiple Import and Export of Images

I wrote a program that imports an image and creates three new images, for example "black and white" or "grey scaled". My problem is that i work with around 200 images and it takes a long time to ...
0
votes
1answer
63 views

Exported picture has less MB than imported

I have to duplicate a picture several times – and each time the duplicate shall have another name. I do this with mathematica 10 with the following easy code: ...
0
votes
1answer
99 views

How to import columns of data (.mat file)

I have a two 100x2 .mat file and I would like to get the elements stored as pairwise entries i.e. something like data = [{a1,b1},{a2,b2}..{a100,b100}]. Can someone help me do this efficiently?
1
vote
0answers
70 views

How to import and export msgpack?

MessagePack is an efficient binary serialization format, I find it much better than JSON. There is currently (as of v10.3) no support for this in Mathematica. Does anyone know of third party ...
0
votes
1answer
354 views

How to open *.sif files with Mathematica [duplicate]

While I am processing my data collect from an Andor EM-CCD, I find it diffcult to import the file into mathematica. I think mathematica can open this kind of files since that Matlab can open it. So if ...
4
votes
2answers
115 views

Reading an ASCII file mixing text and numerics in Mathematica

We have a sequence of large data files (LAMMPS dump files) which begin like this: ...
1
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0answers
49 views
2
votes
0answers
99 views

Confocal Microscopy

Is it possible to direcly import Nikon ND2 files (e.g Confocal microscope 2D or 3D stacks files)? Otherwise how can we import TIFFs of 3D stack and process it as a single "entity" so to speak? ...
2
votes
1answer
100 views

How to download tables from a url?

I'm trying to import all the tables on a website, this one in particular: https://aws.amazon.com/ec2/pricing/ For local files that are already tabular, ...
3
votes
2answers
123 views

Troubles importing date and time from CSV file

I'm trying to import CSV file with the following format: 20150803 00:00:01.649,1.09675,1.09678 using this code: ...
2
votes
1answer
123 views

Fourier of List

I have such a problem. I try to evaluate and plot the spectrum of large list, and this is what I get: ...
4
votes
2answers
128 views

Import Data different column length

Lets assume, i have this data.txt file. s1/km t1/h s2/km t2/h 20 1 40 1 40 2 80 2 60 3 I define myself a function ...
2
votes
3answers
116 views

Importing and saving .csv files as variables with the original filebasenames

I have a modest number of .csv files that I want to import into mathematica. I would like to save their contents as their filebasename for use throughout my notebook, but I am running into errors as ...
0
votes
0answers
70 views

How to prevent space trimming when importing HTML with ImportString?

I am importing a HTML-formatted string with ImportString[string, "HTML"] to properly parse all HTML-escaped characters like ...