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
1,428
questions
5
votes
1answer
127 views
How to import equations from a pdf
Here is a pdf I am trying to import: https://i.stack.imgur.com/J2e0z.png
Its a photo so that I can upload it here easily. I am trying to extract the formulas from this pdf but to no avail. Plaintext ...
2
votes
1answer
63 views
How to Import multiple sheets (aka tabs) from Google Sheets?
One can Import multiple sheets from an Excel file, say sheet "n" with Import["file.xls"][[n]],
but how to do ...
0
votes
1answer
35 views
Cannot retrieve a function definition from file after save with ParallelDo
This is an example of a problem I have retrieving functions from a file I save using ParalleDo.
...
0
votes
1answer
50 views
Creating a ListPlot From Imported Excel file with errors
I'm learning mathematica, and right now trying to plot a graph with error bars. What I would like to do is to import 3 lists with x values(1/viscosity), y values(permeance), and error values, and plot ...
0
votes
1answer
37 views
Importing a .csv containing list of complex numbers
I exported a list (with two columns) to a .csv file with Mathematica, and the first few lines are,
...
1
vote
0answers
59 views
Ignoring or deleting empty cells from an Excel import
I have tried all the possibilities with DeleteCases and everything at the answer in the closed question on the same subject
how to exclude empty cells when Importing from excel?
and checked my input ...
1
vote
0answers
32 views
HPC doesn't read .mx file
I am trying to work in an HPC cluster. Mathematica works fine and I can export tables that I need. However, I had one interpolated data saved in as a mx file. I ...
0
votes
0answers
35 views
Import imaginary numbers
I'm trying to import a matrix data which contains complex numbers, and uses "i" as the imaginary number. Because Mathematica uses "I" for the imaginary number, it doesn't read my ...
2
votes
2answers
317 views
Read sympy expression in .txt file as Mathematica input
I have a Python file that has a variable defined using sympy. For instance, let us take the following (crazy) example that I could have eventually since I am automatizing a routine:
...
3
votes
3answers
84 views
Importing complex numpy arrays
Related question: Formatting Imported Complex Arrays from Python (csv. files)
I am trying to import a large numpy array to Mathematica but the strategy in the question above is far too slow. For a 100-...
1
vote
0answers
106 views
How to stream NSE option chain data into mathematica
I'm trying to stream option chain data into mathematica from the
url: https://www.nseindia.com/api/option-chain-indices?symbol=BANKNIFTY
...
0
votes
0answers
40 views
Error trying to import multiples excel files
I have a set of Excel files produced daily, in a folder, with names like: "GH tl data - 2021-08-01_2021-08-01.xlsx". Each file has just one worksheet. The files have many columns of data (...
3
votes
0answers
43 views
Importing all parts of a multipart email
Here is an email with two parts, a plaintext part and an HTML part:
...
1
vote
2answers
49 views
Reading File of Complex Numbers
I have a text file "IQ256.txt" with the following format (one complex pair per line):
-23636.100 13359.055I
-25478.040 9342.004I
-26637.370 5257.033I
-27184.020 1087.021I
-27069.778 -2976....
0
votes
0answers
25 views
Correcting Import Errors presumably caused by unwanted whitespace characters
In scrapping data from a website that has a list of references searchable by the first
letter of the author. I have attempted to Import this as a single html file for each
letter. Oddly, this works ...
0
votes
0answers
57 views
Importing n different pdf files and sending them to n different emails
How with MMA could I do to load from a folder called "jobs" "n" different pdf files and send them to "n" different "gmail" emails stored in a mails.txt file in ...
0
votes
0answers
18 views
How to rewrite Import[filename, {"XLSX", "Dataset", 1} in Mathematica 11?
The example of usage that you can find documented on the [Wolfram site][1] seems not to work in Mathematica 11. Is there another way to parse the Header of the excel file?
...
3
votes
2answers
112 views
Import PDF as `Graphics`
How can I import a PDF file as a Graphics object. When calling Import["filename.pdf","PDF"], Mathematica ...
0
votes
0answers
19 views
Importing multi sequence Midi Files into Mathematica
Can I import a multi sequence Midifile into Mathematica?
Can I import multiple short Midifiles into Mathematica in one go?
Thanks, peter
1
vote
1answer
29 views
How to get correct note timings when importing multi-track Midi files?
I have observed when importing midi files with more than one track, the times for every track except for the first one are sped up.
for example,
...
0
votes
1answer
70 views
Import structure from Matlab into Mathematica 12 and nested lookup
I use Matlab and generate data that I save in a structure in a MAT file. I want the results to be loaded into Mathematica, as several analysis and plots are best when done in the latter than in the ...
4
votes
1answer
159 views
Copy clipboard content to mathematica notebook - line break symbol changes
There are 3 kinds of line breaks
\r
\n
\r\n
For windows, \r\n is standard.
Suppose that there is a file called document.txt, using \r or \r\n as line breaks.
Suppose that I open document.txt with a ...
2
votes
1answer
54 views
Read files from TLS server using Mathematica
Good morning,
I would like to know if anyone knows if it is possible to read files from servers with TLS using Mathematica. In particular, my interest is to read files from the CDDDIS server (NASA's ...
1
vote
0answers
72 views
Is there already a program that analyzes THz-TDS data in Mathematica?
I plan to write a code that reads the time domain data(sample+reference), performs Fourier transforms, calculates transmissivity, solves the transfer function numerically, and gets complex refractive ...
21
votes
2answers
949 views
How to make Mathematica read in CSV as fast as Python's Pandas
I have many big CSV files for processing in Mathematica.
And each time loading them into Mathematica takes a long time.
Meanwhile, it takes much less time using Pandas under Python.
For example, ...
1
vote
1answer
62 views
Editing complex arrays for export to Python
Quick question, can anyone advise on an efficient way to convert complex arrays with complex part denoted '${I}$' in Mathematica to '$j$' (as used in Python) and curly brackets '{}' replaced with '[]' ...
0
votes
4answers
70 views
Formatting an imported data into Mathematica in a matrix form
I have a file whose data read as {{0,:,1,2,3;},{1,:,0,164,165;},{2,:,0,3,167;},{3,:,0,2,166;},.., {"$$"}}
I have to format this data into a matrix. There ...
1
vote
0answers
61 views
Lists of rules vs. Associations
It seems that generally, Mathematica users (or at least the Q&A I've read here) prefer associations to represent data in ways that many other languages would use structures.
However, when ...
0
votes
2answers
46 views
How to copy a specific parameter from imported text file
I am working with the imported text files in Mathematica. Each text file has experimental data, measured at a several input parameter like "Field (V/cm):" How to ask Mathematica to copy the ...
2
votes
1answer
128 views
How do I get the data from this binary file? [duplicate]
I have a file which contains the following binary data:
...
6
votes
2answers
144 views
Is there a CryptocurrencyData alternative to FinancialData?
What's the easiest way to ingest time series data on cryptocurrencies into Mathematica?
I'm looking for up-to-date price, volume, and other properties for both major coins and altcoins.
1
vote
0answers
25 views
Automatic import of the lexicon for the Game of Life
I am trying to import the lexicon for the Game of Life, preserving the structured information as far as possible automatically (so if the data changes a future import will update it).
The text form of ...
0
votes
0answers
18 views
Can FormPage be used to upload a file (a CSV to be specific)?
I want to use FormPage to give the user an option to upload a CSV file and once it is uploaded, the data from the file should be plotted. How can this be done?
Thanks!
0
votes
2answers
88 views
Importing selected data from text files
I have a large number of text files in a folder with different names. These are the output data files from an experiment. Each text file has first 50 lines of text, followed by four columns of ...
0
votes
1answer
33 views
How to import a table of numbers from a .txt file without losing dimensions?
I have a long txt file (which attached here). I want to import this file and then use a special line (in this case line 112) to plot a graph. I tried this
...
1
vote
2answers
77 views
How to find the line number of a string in an imported `.txt` file?
I have a txt file which contains a lot of data (in fact it's the result file of a .nb file which I have run on a cluster). I want to use the data to plot some graphs in a new .nb file.
Since there are ...
0
votes
1answer
32 views
How can I apply list of replacement rules properly to a data after importing the data?
I have a list of data in which each element has its name as follows:
...
1
vote
1answer
44 views
How to extract the data from the given filename?
Consider a few files with filename structure
data/Neutrino distribution functions/NAME_distribution_mass=XX.0_theta=0.YY.txt
where XX/YY may have an arbitrary ...
2
votes
1answer
58 views
0
votes
0answers
26 views
How to save data to a new file, import the data and then use it
I have a for loop which generates random matrices and then some scalar numbers for example:
...
2
votes
3answers
106 views
How to make a 3D listplot with meshlines going only along one cartesian coordinate?
I have an external python code that computes a bunch of data, which I read into Mathematica as a table, so: Import["Documents\Hubbard\Python\data.dat", "Table"];
These files are ...
0
votes
0answers
52 views
how to exclude empty cells when Importing from excel?
I am very new to mathematica and I need help importing excel file. The file that I am importing has a bunch of empty cells throughout the column and it is giving me some trouble taking an average of ...
0
votes
0answers
17 views
How to specify authenticity of SSL for querying APIs?
While ago I was using this command with no issue, now I have an SSL error:
...
0
votes
0answers
45 views
Large MatrixMarket file fails to load into Mathematica
I am trying to load a large sparse matrix (~20GB) into Mathematica using Import[]. The machine has plenty of RAM available. However after a while ...
0
votes
0answers
32 views
Mathematica CSV values
I wanted just to add constant to each value. i. e.
data = Import["/Users/paul/Desktop/rtm1.csv", "CSV"]
And I get
...
0
votes
0answers
53 views
importing mathematica files into Github [duplicate]
I'm going to import my files in Mathematica (.nb) into my Github profile. Is there any method to do that?
Thanks
1
vote
1answer
74 views
1
vote
1answer
73 views
Problems with importing .mat data that contains NaNs
I had a .mat data that I wanted to import to Mathematica. I tried using
Import["File path","Data"]
But it didn't work. It just returned de ...
0
votes
0answers
26 views
Curved text layout with UnderoverscriptBox support
There are a few questions related to laying out strings of text along curves, Text along a lemniscate curve, How can I wrap text around a circle? and others.
See the GIST.
Most answers either layout ...
13
votes
1answer
272 views
Easily download SE posts as notebooks?
Is there a common method of grabbing an SE post or answer here as a formatted notebook so that you can immediately run it, instead of copy-pasting the code blocks?
I've heard SSE uses MarkdownSharp ...
