Questions tagged [data-acquisition]

Questions on the use of Mathematica to capture data from external sources.

Filter by
Sorted by
Tagged with
36
votes
2answers
2k views

How to make a curve selectable from a scaned image and convert it to a list of coordinates

I have a scanned image (binary-ized): Is there any way to reduce one of these curved lines (full or dotted) to a series of its coordinates (e.g., sampling interval of 0.01 on x-axis)? I've read ...
21
votes
1answer
2k views

How to use WikiMapia as GeoServer?

I wish to use the Wikimapia map as background in GeoGraphics. According to the Wikimapia Docs, Wikimapia's URL is encoded as follows: An example Wikimapia URL is ...
15
votes
3answers
9k views

How to request financial data from Yahoo's YQL and Quandl?

How can I download historical data from Yahoo ? Although Mathematica's FinancialData function uses Yahoo it could be useful to have more control on how to retrieve data from Yahoo's YQL. Edit ...
19
votes
1answer
2k views

Release the web camera after using CurrentImage[]

CurrentImage[] will capture an image from the webcam. It is even possible to create a live video in the notebook using ...
4
votes
3answers
2k views

Importing CSV with multiline text fields

Bug introduced in 8 or earlier and fixed in 11.2.0 Here is a valid CSV: a1,b1,c1,d1,"e1 e1 e1" a2,b2,"c2 c2 c2",d2,e2 It has two rows and five columns, and ...
32
votes
2answers
6k views

Streaming Data into Mathematica from a serial port

I'm attempting to see if I can capture an incoming stream of data being transmitted remotely from an arduino device into Mathematica. The plan is to connect some temperature probes to the Arduino, ...
21
votes
1answer
3k views

Is it possible to extract data from an EPS plot not generated in Mathematica?

I want to extract data from an EPS plot not generated in Mathematica and replot it. In general is it possible to extract data from plots in any formats in Mathematica? I searched but unfortunately ...
22
votes
1answer
840 views

Capturing Data from an Android Phone

Is there a way to capture Data from an android phone to be later analyzed in Mathematica?
14
votes
2answers
578 views

COVID-19 Wolfram Data Repository Retrieval

I'm using this dataset to check out the data on new COVID-19 cases. But there are two issues: Two days ago it was working great and it had data up to March 13; 1 day lag. Now when I run the cell in ...
6
votes
1answer
559 views

Using sockets to connect to a trading platform

I'm trying to use Binance's API. The following works: ...
23
votes
3answers
2k views

Download xkcd Click and Drag comic

Inspired by the recent question about xkcd styled plots I started looking at xkcd again and I came across a comic titled Click and Drag. And if you do that, you start exploring a larger drawing. A ...
9
votes
2answers
2k views

Mathematica TCP socket client toward Trading Platform

I'd like to connect Mathematica with my Italian electronic trading platform. To connect I need to open a TCP socket client towards the trading platform and send a string command. The high-level ...
7
votes
1answer
2k views

Using PutAppend to write large data files

I have a loop which computes a table, tab, of results at each iteration. This table is usually very large and I would like to use ...
6
votes
1answer
149 views

Export Data from several tabs in a website

Here is the website from the official federation: http://results.ittf.link/index.php?option=com_fabrik&view=list&listid=36&Itemid=158 I want to export the Data (the table). There are ...
23
votes
1answer
2k views

Using ImageCapture to access a USB webcam in linux

Is it possible to access a USB webcam through Mathmatica on Linux? When I run ImageCapture[] I get the following output ...
14
votes
1answer
770 views

Detecting and counting signals in list data: checking pulse rate

Hope this isn't too much of a basic question: I'm looking for some Mathematica functions, but I don't know which ones. Background I recently read about a simple technique for reading your body's ...
13
votes
2answers
493 views

Extracting data from analog screen photograph

I'm using an analog profilometer from the 1970s and need a way to digitize the data and the only way is through a photograph. I've searched but all I could find was how to extract data from computer ...
3
votes
1answer
696 views

extract data from a graph image

How do I convert the following image graph into data (if possible into function)? I checked this answer and found that my problem is grid and plot have same color.
10
votes
3answers
695 views

How to make a picture grid of all Nobel Laureates in physics?

I want to make a picture grid of all Nobel Laureates in physics using mathematica. Later I wanna print this picture grid on a big wall! The first thought I came up with is to exploit the powerful ...
10
votes
1answer
857 views

Direct Pressure Data Acquisition with Mathematica and Arduino

Mathematica can upload code to the Arduino and read/write values to pins, execute commands, etc. Im trying to use this to do Direct Data Acquisition with a pressure sensor. Here is the link to the ...
8
votes
1answer
333 views

Does GeoGraphics support Elliptical Mercator projection?

When working on the answer to this question I found that GeoGraphics seemingly uses by default the Spherical Mercator projection (also known as "Web Mercator") ...
4
votes
1answer
2k views

Excel DDE Link: reading and writing in real time

I'm wondering if it is possible to link Excel and Mathematica in real time, so that Mathematica can be used as a computing and "storage" tool. Suppose I have an Excel spreadsheet with an active DDE ...
8
votes
4answers
295 views

Data Entry via 2D Graphic (formerly: Using a Slider2D to add data points to a list)

This bit of code sets up a list with the first entry already in it -- {{1,1}}: ...
4
votes
4answers
513 views

How to efficiently read blank line separated data file into list of lists

For example, I have a test.dat file with contents as below: 1 2 3 4 5 6 11 22 33 44 55 66 (Note that there could be ...
3
votes
1answer
230 views

Parsing JavaScript Script from XML Trees

I've been trying to parse some script written in JavaScript while scraping a website, and am a little confused what functions are needed to get this done in Mathematica. I imported the data using <...
2
votes
3answers
93 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: ...
1
vote
1answer
380 views

Extract data from an image of a density plot?

I have a density plot in image form and would like to extract the data points from it. How would I go about using Mathematica to accomplish this? My ideal output ...