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
1,261
questions
2
votes
1answer
35 views
Problem importing a pdf with a character with increasing opacity
I want to import a pdf in MMA(ver 12.0).
The pdf is here.
This pdf has a "$c^2$" in the middle of the white square that is completely transparent in the first page, then it become progressively more ...
0
votes
0answers
24 views
Importing Excel Files and Extracting Parts of the Dataset
I'm trying to import two Excel files that have multiple sheets to Mathematica using the following code:
...
1
vote
1answer
43 views
Create table A with entries of the form Ai_j
I would like to create an $m \times n$-table A with entries Ai_j, where $1 \leq i \leq m$ and $1 \leq j \leq n$. I have seen ...
1
vote
1answer
25 views
SemanticImport returning different data versus Import
I'm analyzing data for Covid-19 and found an interesting website: "https://covidtracking.com/api/states/daily.csv". My problem: using SemanticImport, it seems stuck on the data that I read yesterday ...
0
votes
1answer
40 views
Implement a function which import data from the same webpage root
I would like to implement a function to import several dataset from the same website source, where for each dataset it changes just one word on the website address.
Here the website: ...
0
votes
0answers
15 views
Exporting a Mixed (text and numeric) List to a File and Reimporting it Without Unwanted Changes
I found a few similar posts, but not close enough to give me an idea what to do. My problem is that I have a mixed format (data and string) nested list which I want to output to a file. I then want to ...
3
votes
1answer
124 views
SemanticImport vs Import differ on same CSV file?
Using WL 12.1.0. Is SemanticImport caching data somewhere? I did this SemanticImport for the first time, yesterday. Worked fine. ...
4
votes
1answer
84 views
Correcting nonsense digits during data import
I import large amounts of data, and for whatever reason the data in cases add large numbers of either '0s' or '9s'. However, as the numbers have very different relevant digits, I cannot simply use ...
0
votes
1answer
26 views
Avoid an Error Message when Importing
Consider the following code
Button["Import", file = SystemDialogInput["FileOpen"];
data = Import[file], Method -> "Queued"]
which yields a button which, ...
2
votes
4answers
109 views
0
votes
0answers
40 views
429 error when importing webpage
I am interested in checking which of my favorite groceries are on special at which supermarket before going to the shops (to know which items to buy from which supermarket) but every time I try to ...
0
votes
0answers
10 views
Trouble re-importing the output from an x3d export
I'm having some trouble re-importing the output of an x3d export of a 3D plot, and I'd like to understand why it's failing and how to fix it.
The short version of what I want to do is to make a 3D ...
0
votes
0answers
29 views
Import a function from another notebook changing a parameter
I am trying to import a function obtained from another notebook into my current notebook. In addition to importing it, I must replace all x with (x + 40).
Here goes na example:
Notebook 1:
...
2
votes
2answers
101 views
How do I perform Bessel function computations for data imported from MS excel?
I am trying to perform Bessel function computations of the form Jn(b*x) where n is the order of the Bessel function. I have three columns representing x, b and n. I wish to import this data into ...
6
votes
0answers
71 views
Importing a 12 bit array
I have a binary file of 12 bits integers obtained from a camera software. It can produce FITS files from these but the processing time on the large data set I have is excessive. What I have is the ...
0
votes
1answer
49 views
import and compare values in csv files according to a condition
I have lots of csv files in a folder. Each file contains a column with date, year and time and the second column values for each time. I would like to import all these files and for each file take a ...
4
votes
1answer
86 views
Reduce quality of an imported MeshRegion
Importing STL files using Import results in a MeshRegion composed by the triangulation of the original file, and a similar ...
4
votes
1answer
35 views
Merging columns during SemanticImport
If one is trying to use SemanticImport to import geo data, how does one merge two separate columns (Lat and Lon) into one column that GeoCoordinates needs?
1
vote
3answers
90 views
Import data from different webpages of the same website
I imported and cleaned the following datasets for england soccer league in order to have home/away rank tables and next round matches:
...
0
votes
1answer
38 views
How to use module to assign functions to a set of imported text files?
I have a lot of text files in my folder (in this example I'm using only 8). I am trying to import all of them and then do calculation on each individual file; I want to use the same notebook without ...
0
votes
0answers
52 views
Is there a more efficient way to use StringReplace?
I have constructed a table that I want to save in such a way that it looks like a python input because of reasons. For that I save the table's output in a .txt file and then perform a StringReplace ...
8
votes
0answers
161 views
Guide to capturing the complete image of given urls?
I'm trying to use WebImage[] to capture the complete image of a website (yes, it might be very tall). I seem to be having some issues with it:
How to attempt to capture a complete image of the ...
3
votes
0answers
54 views
Reading through file one line at a time, running out of RAM [closed]
I have a handful of files (some of which are very large), and I would like to loop through them one line at a time, run a calculation, and then write the result of the calculation to a new output file:...
13
votes
2answers
349 views
How to import SVG files?
In the document I found that SVG files can be exported, but there is no information of Import.
How can I do that?
1
vote
0answers
75 views
Trouble reading FITS with Mathematica 12
I've been using Mathematica to process FITS for years, but it has changed in version 12. Import now yields an Association rather ...
1
vote
0answers
67 views
Importing a table of real numbers from a text file were data is represeted in Fortran form [closed]
I'm working on a project that is analyzing seismic displacement data in the above form. It's basically a text file but I could conceivably need to bring in hundreds of files each containing anywhere ...
0
votes
0answers
37 views
How to use Headers after imported them?
I read this post here, and played a bit with the Import function, so I now have my data imported from xlsx file, which say is a <...
3
votes
3answers
171 views
Trying to replace the text E with scientific notation
How to replace the E with scientific notation *^?
...
3
votes
1answer
71 views
Importing a List of Comments from Hacker News
Consider this link has a bunch of separated comments:
Is there a clever way to import this into Wolfram Mathematica such we end up getting a list of comments (for, say, sentiment analysis ...
4
votes
2answers
77 views
Importing a Google Sheet including blank cells (default is ragged array)
I'm able to import data from Google Sheets using e.g.
...
2
votes
2answers
87 views
Running a notebook which imports and exports files repeatedly
I am trying to automate the process of running a Mathematica notebook that takes as an input a .txt file and exports another .txt file. This notebook was not written by me, and I don't fully ...
1
vote
0answers
39 views
How to recover plaintext from .MX files?
I need a function to deserialize the contents of an MX source file for reading. We can’t simply use Get because I don’t want to load or run the code, but rather to ...
3
votes
1answer
41 views
Importing graphs from geng incrementally
Is it possible to import graphs generated by geng (a tool from the nauty suite) one by one, rather than all at once. If one could also specify not only the order ...
2
votes
1answer
32 views
SDF Metadata Import fails when structure information is missing
Background Information: In Mathematica 12, SDF Import automatically triggers the generation of Molecule[] representations. SDF files contain both structural information as well as metadata, and a ...
2
votes
1answer
96 views
CSV import with delimiters not working for certain characters (curly quotation marks)
Here's an example CSV file (Example 1):
"Text","”","False","False","False","False","0","1","24","0","9","450","450"
and the code to import it (Code 1):
...
0
votes
1answer
50 views
Retrieving a list of tagged output cells and a list of variables from various Notebooks into a new Notebook
The table below provides the information needed to formulate my question: how can I gather a selected number of tagged output cells and variables in a new notebook?
I have two notebooks ...
6
votes
1answer
214 views
Importing a Wikipedia Table as a Dataset?
I am trying to import this table from Wikipedia into Mathematica as a Dataset. The fields I'm interested are Name, ...
1
vote
1answer
32 views
Converting String in “Data” Format within Mathematica [closed]
Hi I have a simple question. Given a random string in the format accepted by the Import[fileWithString, "Data"] i.e the file contents being
...
0
votes
0answers
42 views
Importing text file to plot animation in 1D
I have .txt file with data that I want import into mathematica and then create a 1D animation/simulation of 3 curves.
The format of the ...
0
votes
1answer
35 views
How to obtain integers from a txt file? [closed]
I have txt file with some comma-separated integers and i'd like to obtain a list of said integers to work with.
My best result was:
...
9
votes
1answer
128 views
Importing Packages to .wls without shadow definitions and context specification
I am trying to import a package that works correctly when I use it in a notebook in a wolframscript .wls. I get a weird shadowing problem, however.
Here is a minimal working example ...
9
votes
0answers
221 views
Is it possible to use better modern compression algorithm instead of zlib in Mathematica for efficient data saving and loading?
Some backgrouds of my problem:
Recently, I had a heavy data analysis work to do. Each day I got thousands of csv Files(colums with different datatype) with total several Gigabytes. I have to ...
1
vote
1answer
48 views
Import and Export DateObject
I'm trying to import a spreadsheet with dates and export it again. But the cell reads ### in the exported file. It's shown in the screenshots. This is my code.
...
0
votes
2answers
114 views
SmoothHistogram doesn't appear to work
I have a data set with 500,000 elements. I am trying to use SmoothHistogram to plot the distribution, but it doesn't work and the kernel quits. I used R on the same ...
2
votes
1answer
53 views
Data manipulation in Mathematica
I have a very big data set that I have generated in Matlab. I am importing into Mathematica since doing some data manipulation is much easier.
There is one caveat, which is the following: I have ...
12
votes
0answers
408 views
Why does Mathematica consume so much memory when reading binary data?
There are somewhat similar questions on here, but I didn't find a satisfying answer for this case: I import a 1.7 GB binary data file using the following command:
...
2
votes
0answers
109 views
Is there a way to make Mathematica work with Parquet?
Has anyone tried to make Mathematica work with Parquet?
If so, what are the solution possibilities? And how can
this be made possible?
https://community.wolfram.com/groups/-/m/t/1595622
7
votes
1answer
176 views
How to import a ByteArray from GenerateHTTPResponse?
Without GenerateHTTPResponse the import works as expected.
ba = ExportByteArray[Plot[x, {x, 0, 1}], "PNG"];
ImportByteArray[ba]
...
0
votes
0answers
33 views
Working with time series GDP data
I have two questions.
First, how do I get a list of points from CountryData["UnitedStates", {{"GDP"}, {1960, 2018}}] as opposed to a graph.
Second, if I have a ...
3
votes
2answers
43 views
Import expressions from a file without it getting evaluated?
How can I import a file without its expressions being evaluated ?
E.g. assume that the file "test.m" contains just the list
{a, a + b + b + c, d}
If I use
<...
