Questions about getting data, files, images etc. from various formats into a form that can be read, tranformed and manipulated by Mathematica
0
votes
1answer
102 views
Read a file into a list of vectors [closed]
I have file structured as (Axis 1) (Axis 2) Data.
As an example:
...
8
votes
1answer
164 views
Import the “thumbnail” of an internet page
I have a list of internet sites links from which I would like to automatically recover the page image/thumbnail and page title.
Let's suppose that one of the links is https://www.google.com/, I would ...
4
votes
1answer
64 views
How to prevent output truncation when importing large Graphics?
The Evaluation Preferences in Mathematica specify a maximum output size of 1048576 Bytes before truncation occurs. That makes a ...
2
votes
2answers
154 views
3D scatter plot from a txt file
I have a txt file with space-delimited x, y, z coordinates of several points. The points are organized into groups of unequal size; the groups are delimited by skipping a line, like this:
...
3
votes
2answers
118 views
Extracting a single layer from a SHP file
I have an ESRI ShapeFile (SHP) that I've loaded. It has a number of layers which I can see the names of by using:
Import["file.shp", "LayerNames"]
I get ...
2
votes
1answer
107 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 ...
10
votes
2answers
375 views
Maximum size of TIF files in Mathematica
I have a question concerning the maximum size of TIFF files Mathematica can handle. According to the TIFF 6.0 specification -revision 6.0 (see: ...
2
votes
1answer
200 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 ...
20
votes
1answer
797 views
Programmatically retrieving e-mails from a remote server
Mathematica has a function for sending mail (SendMail) and can import the MBOX format. But what I'd like to do is ...
2
votes
1answer
147 views
Read and filter a text file without importing
I have a large text file of a million sections. Each section contains A lines of header and B lines of numeric data.
I want to read the first and last line of B from each section (to have a list of 2 ...
6
votes
0answers
103 views
What are the known differences between Save and DumpSave, and how to account for them?
Edit: I changed the title and (slightly) the wording of this question in order to make it more easily answerable.
If I evaluate this in Mathematica 9:
...
2
votes
1answer
150 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 ...
7
votes
0answers
149 views
Is there an efficient and elegant way to import huge datasets from a mysql database?
I'm struggling to import huge datasets (up to a couple million rows) from a MYSQL database into Mathematica. I already tried http requests, direct sql calls, as well as implementing a web service, ...
12
votes
1answer
245 views
How to efficiently import videos
I need to do frame-by-frame analysis of videos. I can import the video files I need, but each file is too large to import at once. I can use the ...
3
votes
2answers
139 views
Since installing mathematica 9 I can't import certain tiffs
I have a notebook written in Mathematica 8 in which I imported Tiff images and everything worked fine. Since I installed Mathematica 9, I get the error:
...
0
votes
1answer
167 views
Import Excel sheet into 3D array?
I have an excel spreadsheet that I would like to plot in a 3D graph using mathematica. The X and Y values are the location of the cell, and the Z value is the number of the scale.
How can I import ...
-1
votes
1answer
184 views
Why does the PlotStyle not apply globaly when I plot multiple data files
I have several data files which contain columns of data. All my files follow the same format data001.out, data002.out, ... , data00n.out. I want to import and plot all of them simultaneously. In ...
5
votes
1answer
121 views
Accessing data on local machine from remote kernel
I have a remote kernel on a server that I would like to use to process some data. The connection works, i.e, I'm able to use the local front end and the remote kernel. However, I cannot figure out how ...
16
votes
2answers
347 views
Why does ImageData need four times more memory?
Background
We are dealing with very large TIFF image files that are imported, processed and exported using Mathematica 9. Many of our algorithms only work with an array representation of the images, ...
3
votes
1answer
88 views
Mathematica - set end-of-line characters when importing
I have a plain text file of tab-separated values that was created on a Windows machine. I want to import it into Mathematica on a Mac.
...
4
votes
1answer
106 views
Why can't an `Import[]` change $Path?
Does anyone know why Import["http://**server**/file.m"] can't make a change to $Path? It seems like ...
0
votes
0answers
149 views
How to import data from Blender or 3DS max file?
I would like to ask how to import a file from Blender 3D application and make a isolines plot.
What I intend to do is to make a terrain model in Blender, and make a topographic map of it in ...
0
votes
2answers
119 views
Exporting lists with two extensions to files
Continuation of this question: How to export if I need to have two extensions instead of one. E.g., in the previous case one can generate lists labeled L[1], L[2],.....and so on using a loop. But if I ...
1
vote
2answers
254 views
Can I improve the importing speed of Excel data?
I have data in an Excel spreadsheet that has 4 rows and 1,000 columns. I am using Import as follows:
...
2
votes
1answer
89 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 ...
0
votes
1answer
238 views
How do I plot a 3D vector field using a data file with three x y z columns?
I have a data file that is the solution of the laplace equation on a rectangular area, which has three columns: x, y and z with their numerical values.
How do I plot this data into a vector field with ...
4
votes
1answer
154 views
How can I colorize an imported model?
How can I colorize an imported model from for example 3ds max?
I'm trying to find the way to colorize a 3D plot from an imported model with something like this:
...
2
votes
0answers
72 views
Problem with DynamicModule in code to import data from several .txt files [closed]
The purpose of the code below is to import data from several .txt files and then plot it using ListPlot. The data files are .txt files with comma-separated data ...
3
votes
1answer
147 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 ...
5
votes
1answer
441 views
Combine multiple PDF files into one document
I have multiple single page PDFs I'd like to join together into a single file. (Obviously I mean the file format and not the probability distributions here!)
I'm aware of free online services such as ...
0
votes
1answer
173 views
importing and manipulating data file
I have a large text file containing numeric data of 1000 groups each of 200 lines. The lines are unsorted. There is a 9 line header at the beginning of each group, i.e., 209 ⨉ 1000 lines altogether.
...
-1
votes
1answer
178 views
Importing Quicken Tab Delimited .*TXT File and plotting
I am using Mathematica 7 to try and plot my quicken data file. I have exported my quicken file as a .*TXT and have made zero changes to it. I want to do a ...
0
votes
0answers
89 views
Do Import and Get work asynchronously? Can I prevent this?
I'm getting strange behavior in some of my notebooks that makes it seem like Import and Get load asynchronously. When I evaluate ...
4
votes
0answers
54 views
Importing .zip file [duplicate]
Possible Duplicate:
Importing Zip files
I have a piece of code which imports a txt file and turns it automatically into a table form. I use the following:
...
1
vote
1answer
203 views
How to set path of IMPORT from excel into Mathematica?
I was able to IMPORT from excel data at the start of my project when both the .nb and EXCEL XLS files were sitting in MyDocument (or some other location), but upon moving both files into my Dropbox ...
3
votes
4answers
183 views
How can I get rid of extra commas in Export/Import?
Consider the following example of trying to export the following table:
Export["test.dat", {{{1, 1}, {2, 2}}, {{3, 3}, {4, 4}}}, "Table"];
Now I import to see ...
1
vote
1answer
269 views
Importing formatted, highlighted text from : HTML vs RTF vs. XML
We would like the ability to import and analyze ASCII documents that have been manually segmented by highlighting and changing font colors of various sections, eg:
The original line breaks, ...
3
votes
0answers
79 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:
...
9
votes
2answers
161 views
How to extract a specific element from EXIF photographic metadata?
It's now possible to import photographs into Mathematica and import the EXIF data at the same time:
i = Import["ExampleData/coneflower.jpg", "ImageWithExif"]
...
0
votes
0answers
157 views
Problem with reloading data saved with DumpSave [closed]
During programming and to avoid evaluating a notebook again, I save my data with DumpSave in .mx-format. Mathematica actually ...
3
votes
1answer
107 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"]
...
4
votes
0answers
84 views
What is the best way (lossless) to import .skp files into Mathematica?
I am using the free version of Google Sketchup and I've got a few designs in hand, which I need to be able to import into Mathematica. I saw the similar question asked by @Sjoerd C. de Vries in Stack ...
4
votes
2answers
384 views
Reading in scientific notation from C++ to Mathematica
With a text file with entries formatted as (output from C++):
f[38.67] = -2.5387862698183892298317350539374412777263289550697e-05;
⋮
Is there a way to read this ...
7
votes
2answers
352 views
Import Fortran unformatted binary
I have an unformatted binary file generated using the Compaq Visual Fortran compiler (big endian).
Here's what the little bit of documentation states about it:
The binary file is written in a ...
12
votes
2answers
652 views
How to import all files of a folder at once?
I know how to import one textfile by calling its name
filestring = Import["myfile.tex", "Text"];
Then "filestring" is a string with the myfile content.
How do ...
8
votes
1answer
263 views
Dealing with large files
I have a *.dat file in which the contents are basically one giant list:
{1,2,3,4} {5,6,7,8} {9,10,11,12}
and so on. I'd like to read in the first 500 members { ...
5
votes
1answer
337 views
Exporting data from Excel into Mathematica using clipboard
I know that it's possible to import Excel data into Mathematica using the Import command, as we can see in this post. But some times, I need just to do some fast ...
9
votes
5answers
367 views
convert long string to integer list
at first, i would like to thank all the people here. i'm working with mathematica for half a year now and always found great advice and tricks.
now, i came up with a problem i couldn't find a ...
6
votes
1answer
173 views
Converting XMLElement objects to plain text
Short version: How can I convert an XMLElement that represents part of a HTML document to plain text?
Long version: The more general problem is extracting ...
20
votes
3answers
848 views
How to read data file quickly?
I have a tab separated value file with 10 million rows each of which has three tab separated values. The first value is a string, the second an integer, and the third another string. How to read ...
