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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3
votes
1answer
358 views

Running external pdflatex command and importing the generated PDF document

There have been a couple of questions about incorporating labels and equations that were typeset in $\LaTeX$ into a Mathematica notebook. Ideally, this requires running ...
3
votes
1answer
391 views

Exporting/Importing a Table of complex numbers

I'm generating a long table of list of the form: PN={{1,2,1+i},{3.5,2.6,2}...},{...},... Using: Export["PN.dat", PN, "Table"] ...
3
votes
1answer
97 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
3
votes
2answers
192 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: ...
3
votes
1answer
138 views

Importing a ragged array while ignoring rows that start with “#” [duplicate]

I am new to Mathematica, and I find that there may be a lot of ways of doing this. I was wondering which one might be the most general. I am importing data from ...
3
votes
0answers
97 views

Problem with FTP import in V10

Mathematica V10 returns an error when download directory. URLFetch :: invhttp: "FTP: could not retrieve (RETR failed) the specified file." V9 successfully retrieves the same reference. This ...
3
votes
0answers
101 views

Using data from multiple cameras

ImageCapture[] has an option Device-> for specifying which camera to use, but ...
3
votes
0answers
89 views

Finding the argument set for internal functions in Mathematica v9.0

I've recently run into a problem with importing TIF stacks in Mathematica: Slow import of multigigabyte TIF image stacks On the advice of Simon Woods and others, I've been looking into the behavior ...
3
votes
0answers
98 views

External file Sub Matrix Import

Is there a Built-In Mathematica Function to extract a Sub matrix from a huge external file? Functions getting pieces of internal nested Lists, (arrays) are in place. Example: ...
2
votes
4answers
1k views

Plotting a large number of data points

I would like to know how to plot when I have a large number of points (arround 600) in a specific format: ...
2
votes
2answers
399 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 ...
2
votes
2answers
308 views

How can I remove text headers when importing a numeric table

I have a file let's say 1.txt having numbers like: fgdgfdg fhdfdh 0.000105533 1.00E-04 0.222281 1.00E-04 0.444456 1.00E-04 0.666631 1.00E-04 asdas ddfdsfsd 0.111193 0.166733 ...
2
votes
2answers
157 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: ...
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 $A=0$. ...
2
votes
2answers
178 views

Modifying imported 3D file

Since I am visualizing my work using Mathematica, I import some 3D models of molecules to my notebook. So, the question is, is there any way to modify somehow that imported models inside Mathematica ...
2
votes
1answer
450 views

Having problems with importing data in .dat format

I have a .dat file from FORTRAN output and I am trying to plot the results. The dat file is a series of rows with the row number as the first column. Now, every other row is empty, that may be ...
2
votes
2answers
56 views

How to prevent conversion of number forms to numbers in Import [ webpage, “Data” ]?

I have tabular data on a webpage. It looks like this: Import["http://mfvonh.me/numericalTable.html", "Plaintext"] 1.0 1.1 3.53 However, I have ...
2
votes
1answer
151 views

Saving a graph of a great number of nodes

I'm developing a code where I get graphs with over 10K nodes. These graphs have a particular relationship between clustering and degree that I need to save for future analysis. The problem is when I ...
2
votes
2answers
202 views

Importing LTSpice data into mathematica

I am working with LTSpice (Discret electrical circuit ( Spice) simulator). I would like to import LTSpice ouput data into mathematica for processing and plots. An example of a file can be found here ...
2
votes
2answers
620 views

How can I import images from a Microsoft SQLServer database?

I have a table with binary data (images) in Microsoft SQlServer. I want to import that data and convert it into Image format. I wrote the following code, but it's ...
2
votes
2answers
289 views

Sound data Import Export

Can't regain the data after Export. Create an array of sampled amplitude values: 2. Visualize as sound 3. Save it 4. Get it back 5. ??? ...
2
votes
1answer
232 views

How to solve issue with exporting / importing data to and from Excel

Background ( simplified ): When I export data to Excel like ...
2
votes
2answers
90 views

How to SemanticImport Multiple Excel Sheets

I have an Excel workbook with multiple sheets that I'd like to import into a dataset each. With Import I can target individual sheets by their name into a nested ...
2
votes
2answers
93 views

Importing Data and Devoting Their Names to Them

There are some files in a directory. I have used of SetDiroctory to access all of them. SetDirectory["C:\\Users\\SE7EN\\Desktop\\mathematica\\test"]; I can visit ...
2
votes
2answers
312 views

How to export a table of complex numbers?

I'm having problems exporting a table of complex numbers. I have: ...
2
votes
2answers
809 views

Importing several huge files with headers & footers

having here several files in ASCII format http://ge.tt/91rv0Jf/v/0 I want to import, while removing headers and footers and then join the several lists. ...
2
votes
1answer
122 views

Import a file only if it contains a certain pattern

Let's say I have three files containing: File 1: x y z 1 4 6 File 2: x y z 2 5 9 File 3: x y z 5 4 8 My goal is to import the data from a file only if in ...
2
votes
1answer
58 views

How to read from /dev/random?

I am looking to read a few bytes from /dev/random on OS X and Linux. The simplest approach fails on both operating systems (see below). Why? What is a ...
2
votes
2answers
123 views

Animation of moving rectangles in 2D from data file

I am not very familiar with mathematica but I know the basics so I thought I give it a try. For a project I have to animate rectangles moving around in 2D (later also 3D). The data come from a C ...
2
votes
1answer
112 views

Text analysis and loops

I need a loop for a text analysis involving about 1000 papers (identical structure of all papers) I have these two commands to read all the papers into memory. ...
2
votes
1answer
169 views

Importing data from excel and assigning a variable to each of its columns

How should I assign variables to the data imported from excel containing 3 columns which are time, mean and standard deviation. I want to perform operations on the three variables to get new ...
2
votes
1answer
136 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 ...
2
votes
2answers
167 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
1answer
813 views

Having Problem with Importing Excel file to Mathematica Notebook?

I have solved some equations and exported the final results, which they are several Matrices, as a EXCEL file ( .Xls ). Now, I want to use these EXCEL files as my inputs to solve some other equations. ...
2
votes
1answer
539 views

How to import a Microsoft Word document into Mathematica?

I have a Microsoft Word document in DOCX format. I need to import it into Mathematica as a String preserving all formatting (font, size, bold/italic style, colors, ...
2
votes
1answer
157 views

diff-able text-only notebooks?

I would like to save my Mathematica notebooks as plain-text documents, so that I can keep them under git version control. I thought that ...
2
votes
1answer
137 views

ReadList with header and foot lines

I want to do some large data analysis, and i want to be able to import files in a fast way. I tried Import, but it is quite slow; ReadList takes half the time. This is the code I was using: ...
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 ...
2
votes
2answers
196 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 ...
2
votes
1answer
492 views

How to export/import function values [duplicate]

I have a function with two variables: f[x_,y_]:=f[x,y] = ... I calculated some values (they are fractions like 435345345/3424242424) and would like to store the ...
2
votes
1answer
464 views

Importing data sets from plain-text files and performing operations on them

I am working with a lot of daily weather files in the txt format. I need to calculate a daily quantity from each of them, e.g., daily light intensity, which ...
2
votes
1answer
52 views

Import selective elements from mixed (text and numbers) data file

How can I import only the 2nd and 5th elements (numbers, located in the 2nd and 5th columns) from all n raws of a data file (.xlxx) that contains both numbers and text. Imported data be inserted into ...
2
votes
2answers
75 views

Overwriting first line of large file

As mentioned, I wish to read the first line of a file, and if needed, overwrite it with a new string. The aim is to have a CSV with a list of possible elements. Example: ...
2
votes
1answer
102 views

Importing web page data

I tried importing a webpage using Import: ...
2
votes
2answers
164 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: ...
2
votes
1answer
176 views

Using NetLink to Import Excel File

I can import an Excel file into Mathematica easily: But when I try from .Net it fails: These are the commands and errors I am getting: ...
2
votes
1answer
57 views

Avoiding re-evaluation of RegionPlot3D on a second computer

After running a RegionPlot3D named "testplot" on my desktop, I followed an earlier suggestion from the forum and saved it using: ...
2
votes
2answers
182 views

Import[] bug (video)?

I have the following code: frames = Import["myvideo.avi",{"Frames",{50,60,70}}]; This imports frames 1,2, and 3 of the video, not 50,60 and 70. It imports the ...
2
votes
1answer
144 views

ReadList importing negative times

This is probably an easy question to answer, but I need a fresh eye... I'm struggling with processing the following file (extract shown here) It's a list of dates, and positive/negative time durations ...
2
votes
5answers
278 views

Creating ordered triplets from an Excel sheet

I have an Excel sheet of the form: " " a b c 1 R S T 2 U V W 3 X Y Z Where every entry is a number (except the blank quotes, ...