Questions tagged [import]
Questions about getting data, files, images etc. from various formats into a form that can be read, tranformed and manipulated by Mathematica
1
vote
1answer
41 views
What info is exchanged when using Import[url]?
When using Import with a url what information is broadcasted/sent to the receiving end of the request and is it possible to monitor/modify that information?
1
vote
2answers
22 views
Import date and number Matrix Formatted as text
Hi I am new to Mathematica. I have a large text file that looks like: {"i":"2008-02-22","v":"9.102"},{"i":"2008-02-23","v":"11.14"},{"i":"2008-02-24","v":"12.21"}.....
3
votes
0answers
46 views
How to import unsupported language dictionaries?
Mathematica seems to only know about these 27 languages:
However, I need access to dictionaries for other languages, namely Romanian and Japanese. Now, WordList ...
1
vote
2answers
67 views
How can I extract blocks of 8 bits data from a plain text file?
I have a plain textfile consisting of 4M numbers (0 and 1's) from the number Pi.
I would like to split this textfile into blocks of 8 bits (ie 8 characters).
I know this can be done with StringTake ...
2
votes
1answer
70 views
Importing Data multiple times from the same File
I have a large data file (.txt) with bivariate data in the following form
x1,y1
x2,y2
x3,y3
.
.
.
xn,yn
---------F 0
x1, y1
x2, y2
.
.
.
xn, yn
--------F 1
.
.
.
...
2
votes
0answers
57 views
Import columns from a long .txt file
I have to import columns 1,2,3, and 6 from a long (2 * 10^5 rows) file with this structure:
...
1
vote
2answers
60 views
Importing Excel File as Dataset
This might be a basic question but I couldn't get it to work.
I have a dataset in Excel that I import to mathematica using
...
3
votes
1answer
55 views
What's the best way to import such dataset?
https://www.ocr.org.uk/Images/400305-large-data-set-lds_1-h630-2018-h640-2018-2019-pre-release-data-mei.xlsx
What's the best way to import such dataset?
I have tried to use
...
3
votes
1answer
74 views
Using Mathematica to read .HDF (not .HDF5) metadata?
I am obliged to work with existing .HDF files. These contain metadata essential to my research that Mathematica (latest version) appears unable to access. Metadata listed on https://reference.wolfram....
4
votes
0answers
50 views
Is this the most idiomatic way to convert matrix into dataset?
Is this the most idiomatic way to convert matrix into dataset? (for Mathematica 10 or higher)
I was kind of hoping this would work:
...
2
votes
1answer
96 views
Mathematica incorrectly imports a table
I am trying to calculate the eigenvalues of a large matrix (10^4x10^4), which is formed by summing a matrix containing advective terms and a matrix containing diffusive terms. I am using the following ...
2
votes
1answer
30 views
Import files AppendTo and ToExpression
I have a list of files all indexed as
filename1,filename2,filename3,... up to 50, all in the same directory, and I wanted an ...
1
vote
1answer
37 views
Programmatic access to Export options for filetype
For specific filetypes, e.g JPG, GIF, etc. I would like to get a list of available options for use in Import and Export.
Unfortunately, the obvious thing doesn’t work:
...
4
votes
4answers
527 views
How can I replace ; with , in an imported excel file and to delete "
I want to import an excel .csv file and ListPlot the data.
...
2
votes
0answers
27 views
Problem Importing Multiple `.wls` Files From Parent Directory [closed]
Inside a Wolfram Script file, I'm trying to import another .wls file that's in a parent directory. More specifically, I'm trying to import ...
1
vote
1answer
41 views
import list of lists list-wise
I produce several times automatically a number of different lists of varying length and structure like:
...
3
votes
2answers
54 views
Is there a straightforward way of naming CSV/TSV columns when importing as a dataset?
I have data in TSV (tab-separated) files. The thing is, columns do not have headers. Importing data is as easy as
ds = Import["foo.tsv", {"Dataset"}];
...
10
votes
1answer
95 views
Creating image layers and saving to pdf
In Adobe Illustrator (and other such graphics programs), it is possible to place different objects on different layers. All objects on a layer can be edited together, their stacking changed, and other ...
5
votes
1answer
146 views
Import data from dynamically generated webpage
I'm trying to get data from a web-page
data=Import["https://stats.nba.com/team/1610612738/traditional/", "Data"]
It returns only a textual information. ...
4
votes
1answer
31 views
Importing the text from paragraph elements within a specified division
I'd like to import plaintext found within paragraph blocks nested anywhere inside certain div's. Here's a page to try it on:
...
-1
votes
1answer
107 views
Importing large csv files [duplicate]
I'm trying to import a large csv file (around 1.5GB) so I can multiply one of the columns, and plot it against another. There are seven columns in the file when I try and open it in excel, and I need ...
3
votes
2answers
80 views
Importing an Excel file as a structured dataset
I need to import an Excel file as a dataset with row and column headers, and the following option using "Dataset" does not work. However, I can import the Excel file using "Data" option as a list ...
2
votes
2answers
55 views
Using list of rules from imported .mat file
I'm attempting to learn Mathematica to replace MATLAB. However, I have some data in .mat files which contains named variables.
Whenever I import the .mat file, I get a list of rules. What's the best ...
0
votes
0answers
28 views
interface problem for image recognition
I made the following code that should recognize the image imported from the pc. If I do it for the first time it's fine, but if I load a second image it leaves me the name of the previous one. You ...
0
votes
0answers
14 views
Import all images of a folder on mathematica [duplicate]
How can I import all the images of a folder on mathematica specifying the category of such images?
For example, if I have a folder with images representing the night how do I import them and specify ...
1
vote
3answers
70 views
How to import a CSV file of files that have space delimited values?
I've received a data file in a mysterious ".pos" format. It consists of many lists that are separated by the space character; these are in turn separated by commas,e.g., { {a b c},{d e f},...}
...
2
votes
1answer
50 views
Importing a raw image
I have raw images that I can import and view with ImageJ. They are the output of a program which I don't have the source code for, so I'm stuck with the output format.
They are imported as follows ...
1
vote
0answers
45 views
Importing and evaluating text file [closed]
I appologise in advance if this was asked before, but I couldn't find the answer.
I have a huge amount of data collected in several lists that I need to analyse. I don't want to have all this data ...
1
vote
0answers
67 views
Cannot import data as NetCDF
This might be obvious but I cannot import a dataset.
Import["data.nc", "Datasets"]
returns
{"longitude", "latitude", "time", "time_weights", "date", "aet"}
...
2
votes
1answer
45 views
How do you upload text from a PDF using FormFunction?
I can import text from a PDF using
text = Import[filename, "Plaintext"];
I'd like to do the same thing using FormFunction, but am unsure how. I've tried the ...
2
votes
0answers
61 views
Import specific range of Google spreadsheet
I am trying to import only a specific range of a Google spreadsheet as data in Mathematica for further usage like plotting. So I tried to use the
data = Import["https://...", "Data"] function, but ...
0
votes
1answer
77 views
Get .csv or .xlsx real data, some missing, into Mathematica and form it for curve fitting and 3D plotting
Problem: My data consists of Real values at Real $x, y$ positions. It is stored in the array-forms: comma-separated (type .csv) and spreadsheet (type .xlsx). As a Mathematica Dataset, it may be ...
3
votes
0answers
77 views
Is there a way of reading the data out of a MATLAB's “.fig” file in Mathematica?
I have a ".fig" file from MATLAB that I know is a list of $ (x, y) $ coordinates. As far as I know, the ".fig" format stores the data and recreates it every time is opened. I would like to get the ...
1
vote
1answer
90 views
Numeric data from a color map
Importing the following image (without a scale):
and knowing the extreme temperatures, is it possible to obtain the graduated scale?
Also, it would be interesting to get the temperatures of all the ...
3
votes
1answer
73 views
Memory consumption problem when reading png images with Image`ImportExportDump`ImageReadPNG
For importing png images I use often:
image = First@Image`ImportExportDump`ImageReadPNG[fileName]
(see: ?*`*PNG*)
since this is faster than:
...
1
vote
1answer
66 views
Is there any built-in way to loop over a column/lines?
I have a file as following:
cat data.m
1
2
3
x+y
2 x + 3 y
So it contains rows containing numeric numbers or expressions,
which at this stage is not ...
4
votes
1answer
77 views
Reading total number of frames in an AVI
I am reading large AVI files and want to know the number of stored frames.
To do that in Mathematica 11.3 I use the following:
...
0
votes
1answer
26 views
How to dynamically name and date a file for import? [duplicate]
I want to import a data file named "A(var1)B(var2)C(var3).dat"
where the values of the variables var1, var2, var3 are being provided by a function. How can I do that?
7
votes
1answer
180 views
Fast export of png images from large avi file with Mathematica 11.3
In version 11.1.1 I used MathMF by Simon Woods to extract png images from large avi files (up to 100GB in size). His package was MUCH faster than using something like that:
...
0
votes
0answers
41 views
Undo added line breaks PutAppend
I used PutAppend to write away a some results. It turns out that Mathematica has inserted annoying line breaks. This is discussed in Why there are line breaks when ...
2
votes
0answers
30 views
Loading previous saved variables into DynamicModule
I have a GUI, built inside a DynamicModule.
I would like to be able to load previous set options and values, changing the values that are currently set within the DynamicModule, not the global ...
1
vote
0answers
54 views
How to parse through a .txt file in the Classify function and assign a class to each item?
I have 2 txt files that contain 500 DNA sequences each. Both files use 2 hard returns to separate the sequences like so:
ATCGATCT...
ATCGATCT...
ATCGATCT...
I ...
4
votes
2answers
234 views
Question regarding MathMF
I want to extract images from an avi file with MathMF from https://github.com/SimonWoods/MathMF.
(please see here the answer of Simon)
A test avi file (named "...
1
vote
1answer
81 views
How to import complex .txt file to matrix in MMA for user defined keywords / database?
I am thinking about how can we import complex .txt file (Ansys/Abaqus) to MMA for the selected database?
For example: txt file (input file):
...
0
votes
2answers
42 views
Is there any means of Importing folder with images( .jpeg) directly?
I am using Mathematica for training dataset of fruits, for which i need to import the collection of images.
Can we import a folder with images directly or Do we need to import each image in iteration ...
5
votes
2answers
180 views
5
votes
1answer
184 views
How to save/load (export/import) symbolized variables?
I have a large number of variables/functions with subscripts and use definitions with memoization to avoid recomputing them within a kernel session, but I cannot figure out how to export them all for ...
8
votes
1answer
137 views
11.3 - import of files with paths containing non-ASCII characters [duplicate]
Import: Version 11.2 works correctly, no problem with non-ASCII characters in the path of file. But upgrated version 11.3
a) does not import these files
b) ...
0
votes
0answers
39 views
How to Import .edf file in Mathematica?
My file is: https://drive.google.com/file/d/1dbjE4zWRS4zKr2lQk05wg-bjEyM5KT0I/view?usp=sharing
I was trying to import .edf file in Mathematica, but every time it showed error.
Import["File.edf"];
...
5
votes
1answer
129 views
webscraping: Wolfram notebook vs browser
In the Netherlands there is a website Funda.nl There you can find all houses for sale or for rent. I used webscraping as a tool to collect data for analyse-purpose. The script I used is like:
...
