Tagged Questions

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
vote
1answer
94 views

Extracting Imported Information

What I want to do is to compare the relationship between the consumption of say beer and wine using scatter plots where each point designates the particular country (preferably named). I have tried to ...
3
votes
1answer
103 views

Import YAML file into Mathematica

Has anyone implemented the import of YAML data files into Mathematica? I suppose some sort of transformation into a nested list of rules would be the way to do it. Thanks
0
votes
1answer
190 views

Import invocation fails with Get::noopen : Cannot open JLink error

The following function call fails when I invoke it in a fresh Mathematica session: ...
1
vote
1answer
68 views

Using imported data in further calculations

I have quite a lot of data in an Excel file, which I have to use in further calculations. The transformation should map a data point with thre coordinates into a two coordinate result. Example: ...
1
vote
2answers
133 views

Problems with importing a .txt file

I have some problems with importing a .txt file as a table. This is the file. I tried importing it with data = Import["data.txt", "Data"] I want to access ...
3
votes
2answers
101 views

Importing multiple tables within a single file

Suppose I have a file with multiple tables, each separated by a line beak, like this: ...
8
votes
2answers
190 views

Working with Java hashmaps from Mathematica

I'm using J/Link to access data from an external Java program. The data are represented as a ConcurrentHashMap (see the official specification here). ...
4
votes
1answer
486 views

Import Large Excel File

Currently, I am working on a large time series dataset, which contains 928,586 rows and 35 time intervals in columns, in excel format (.xlsx) and using Import to ...
3
votes
1answer
111 views

Reading many single files and creating numbered (? or indexed) variable

I tried many different approaches, but I could not solve the following problems, I appreciate your help: What is the best way to read many data files? I mean we have ...
2
votes
2answers
160 views

How to read non-standard-format data into Mathematica from a file

I would like to read non-standard-format data into Mathematica from a file. How can this be achieved? For example, how can I read the following text file of data into Mathematica: ...
0
votes
1answer
190 views

Transforming an image as an object

The problem is following: I have a following animation: ...
6
votes
1answer
175 views

Assign the contents of a “Copy” operation programmatically to a variable?

While an earlier question Cut and paste data from a spreadsheet nominally addresses the issue, a year has past since its OP asked it and I hope that others have come across simpler or more direct ...
4
votes
3answers
191 views

Reading binary strings from file as strings

I have a file that contains binary strings like 01011 00101 01011 I want to import the file to Mathematica as a list of strings, but ...
1
vote
1answer
238 views

How to work with 3D images of STL format

After importing a 3D image of STL format, my possibilities in regard to "3D Volumetric Image Processing" seems rather limited. All examples are given with TIFF files. Is there a way to convert from ...
10
votes
1answer
358 views

Data acquisition from a Measurement Computing USB device

I would like to use Mathematica 9 for to acquire data from a Measurement Computing (MC) USB-201 analog to digital (and other) device for classroom demonstration. I do not have a budget to buy LabView ...
-2
votes
1answer
129 views

Data is imported as string instead of numbers [closed]

newdata = Import["data.txt", "TSV"]; ListPlot[newdata] My data.txt file consists of two columns of numbers, separated by ...
2
votes
1answer
144 views

Is it possible to take data from external database for the CDF embedded in webpage?

I have embedded my CDF in facebook.The data for the CDF should be taken from facebook server or my server dynamically.I tried out but its not working in dynamic code iam not able to access the data at ...
0
votes
1answer
502 views

Plotting Surface Graph from Excel Data Import to Mathematica [duplicate]

I am trying to make a surface graph on Mathematica using Excel Data. My x-axis should be the "A" Column and my y-axis should be the "1" Row. The box of data in between the x-axis and the y-axis should ...
0
votes
0answers
54 views

Importing and running a notebook [duplicate]

I have a very long .nb file. I want to subdivide the different sections into separate notebooks, then call them in a common nb ...
1
vote
1answer
174 views

Alternating Axis Labeling between Left and Right Axis

I'm using the following to label a MatrixPlot: FrameTicks -> {{yticks, None}, {None, xticks}}, I'm labeling these ticks with text. It is impossible to get the ...
2
votes
1answer
138 views

importing large data files with a constraint

As I have learned in this community, one way to import a hefty data files (e.g. millions of rows of {x1, y1} data) if you don't care about the individual elements (maybe just want to obtain some ...
3
votes
2answers
549 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 ...
0
votes
1answer
192 views

3D Plot of .txt File of the Surface Plotting Variety

I'm having a bit of trouble. I've seen other questions answered on here about how to 3D plot data from .txt files of the format: x y z x y z x y z Which works ...
2
votes
2answers
178 views

ReadList and Import cannot read data separated by “,” [closed]

I have a data file contains several lines of numbers that separated by "," and I cannot load it correctly with ReadList and Import. Here is a example: with data contains "," and "\n", simple ...
2
votes
2answers
206 views

import a list of replacement rules

I have a text file with a set of replacement rules, of the form x^3y^2 -> 4, xy^2 -> 2, ... for example. I'm having some issues trying to figure out ...
1
vote
1answer
84 views

Problem with importing a JCAMP-DX IR spectrum file

I wrote a little function to import JCAMP-DX electron ionization or mass spectral files from the NIST webbook web site (e.g. mass spectrum of hydrogen chloride at ...
8
votes
2answers
333 views

Look up info associated with a given CAS chemical identifier from the NIST webbook & NCI CADD Chemical Identifier Resolver

I would like to retrieve information associated with a given CAS registry number (Chemical Abstracts Service nr) from the NIST webbook web site in Mathematica, using the provided API (e.g. for ...
5
votes
2answers
294 views

How to import a “.numbers” spreadsheet?

Does Mathematica support importing a ".numbers" spreadsheet file (from the "Numbers" '09 (ver. 2.3 554) spreadsheet program in Apple's OS X iWork office suite)? A ".numbers" file is actually a zip ...
3
votes
2answers
414 views

video image recognition [closed]

Has anybody experience with video and image recognition? I've made a video of two teams playing soccer. Now I would like to translate each soccer-player to a (x,y) coordinate and follow them during ...
8
votes
2answers
1k views

Speeding up Import and Export in CSV format

I am handling large numerical data in Mathematica. In smaller problems everything worked fine using Export and Import with the ...
0
votes
1answer
86 views

Combining an imported PDB file with a set of Graphics3D objects

Imagine we import a PDB file like so (using the example from ref/format/PDB in the help directory): ...
2
votes
2answers
115 views

How to extract data depending on Position of First zero?

I have a file (attached as an image) which I imported to Mathematica and only extracted the first and second column. My problem is that I want to extract the data beginning from the row where $A=0$. ...
4
votes
0answers
158 views

Single image import from stack via FTP connection

Background I would like to create a CDF document that is embedded on a webpage. The CDF will contain some image display ...
5
votes
1answer
241 views

windrose with data from Excel

How to Import data from excel and use them to Plot windrose instead? Example, {{Strength, Angle(degrees)}..} ...
2
votes
2answers
170 views

How to delete all rows in datafile that contain a string

I'm importing some data from a file. However, the file was created by an unreliable instrument, such that the data looks like this: ...
1
vote
2answers
164 views

Importing numerical data from RTF file

This might be a very simple question but I have been struggling with it for a couple of hours, so thought maybe someone here can show me a quick way of solving it. I have a file in rtf format ...
3
votes
2answers
199 views

Import numeric data into Mathematica

I have a C++ program that outputs a set of numbers at each time step. A blank line separates successive time steps. Here is an example of my data format: ...
2
votes
0answers
58 views

The “right” way to define a custom Encoding format?

I have implemented an Import|Export format for xz that behaves like gzip and other encoding formats: ...
0
votes
1answer
234 views

Import symbolic variables from Matlab with MATLink

I'm trying to manipulate with Mathematica symbolic expression created in Matlab. I'm using the MATLink package, and I've succedeed in importing numerical variables, but not symbolic ones : ...
8
votes
0answers
335 views

Import an SPSS, SAS, or STATA file into Mathematica

I would like to import the World Value Survey data file into Mathematica, but it's only given in spss, sas or stata formats, which are statistical analysis softwares format I think. I can't get to ...
8
votes
2answers
242 views

Problem importing a JCAMP-DX mass spectral file

I have some problems importing a JCAMP-DX EI-mass spectral file using Mathematica 9. For example, if I download the mass spectrum of nonacosane in JCAMP format from NIST, ...
6
votes
1answer
211 views

ReadList can't read correctly

I'm trying to load some data into Mathematica from some files generated by fortran. But ReadList seems can't get the number correct. Here is a simplified version of the problem: ...
0
votes
0answers
168 views

Calling a DLL with two inputs and one output

I need to call a DLL that requires two real number inputs to get one real output back. I can get one of the simple example uses of DefineDLLFunction to work, but I ...
1
vote
0answers
53 views

Getting InputStream errors when including a call to ElementData within an Import definition

So I am writing an ImportExport converter for a common chemistry file format, and I've run up against a problem that seems to be about shared streams and whatnot. ...
5
votes
1answer
427 views

ReadList can't read from file containing high-precision Reals

I want to read a file which contains seven columns of real numbers. Mathematica seems to have a problem with the high precision I need. My code: ...
4
votes
1answer
133 views

Import audio in uLaw format?

How do I import a uLaw-format audio file into Mathematica? Here's an example: hello-world.ulaw For reference, here's the same file in wav format: hello-world.wav As I understand it, the uLaw ...
-2
votes
1answer
237 views

Importing a stack of images [closed]

I have a stack of images with the file names C0001996_0000 , C0001996_0001 etc. In total I have $600$ images. I would like to ...
1
vote
0answers
62 views

Understanding the discrepancy between txt file import and export times, and possibly speeding up Import

I attempted to import a very short .txt file string using the Import command: ...
11
votes
3answers
809 views

How can I transfer mathematical expressions between Mathematica and Maple?

Is there a simple way to copy mathematical expressions between Mathematica and Maple (or at least in one direction)? I mean only expressions built from numbers and predefined mathematical functions, ...
4
votes
2answers
129 views

Workaround for Import not supporting the \leqslant TeX macro

$\{A\leqslant x\leqslant B\}$ Copy the code into Notebook, and you'll lose the less sign, this can be rendered well in ...