27
votes
Accepted
How to use WikiMapia as GeoServer?
In the comments mfvonh correctly points out that the Wikimapia's URL in my question is a user interface URL, not a tile server URL. The tile server link template is documented in a message which ...
- 61.3k
19
votes
Accepted
Importing Graphics from an Online Paper
The graphics we want are on page 50, but there are six prefatory pages labelled i through vi. So we will start by loading page 56 into memory:
...
- 68.3k
18
votes
Accepted
Extracting data from analog screen photograph
Doing this with basic image processing can be done. In comparison to the post you have linked, your situation is more complicated because you have a monochrome image with no option to separate colors. ...
- 112k
17
votes
How can I extract data from a diagram?
this code produces the three lists of data that you want
orange,blue and green
...
- 6,587
15
votes
Accepted
COVID-19 Wolfram Data Repository Retrieval
It never updates for me properly. This is what I do:
...
- 232k
13
votes
Accepted
Importing a Wikipedia Table as a Dataset?
After some mental hemming and hawing, I decided it'd be good to have a proper answer about importing HTML tables using something other than the often buggy "Data" ...
- 46.6k
12
votes
Direct Pressure Data Acquisition with Mathematica and Arduino
I wrote code for data acquisition with the Adafruit 10-DOF sensor a while back. I will share that code, with explanation, so that you can adapt it yourself.
Mathematica + Adafruit == TRUE
It's ...
- 1,700
12
votes
Accepted
How to make a picture grid of all Nobel Laureates in physics?
Here's something to get you started down to path of scraping the somewhat larger individual pictures from the Nobel website:
...
- 65.3k
11
votes
Mathematica TCP socket client toward Trading Platform
I recently discovered SocketLink bundled with Mathematica. It's not documented, but super straightforward:
...
- 1,200
10
votes
Accepted
Parsing JavaScript Script from XML Trees
You have misunderstood how this works. What happens is that JavaScript calls a server-side script which returns the data, and the data is subsequently inserted into the HTML. The data cannot be found ...
- 69.8k
9
votes
Accepted
extract data from a graph image
If the problem is only to remove the grid, that's relatively easy. You just remove everything but the grid, then take the difference.
You can use Closing with a ...
- 35.9k
9
votes
Accepted
Is it possible to import data from Google Analytics?
Since Mathematica 10 it's possible to pull data from Google Analytics using ServiceConnect and ServiceExecute. I refer you to ...
- 69.8k
9
votes
Accepted
Does GeoGraphics support Elliptical Mercator projection?
Yes, it is possible to use the ellipsoidal Mercator projection by specifying an ellipsoidal "ReferenceModel" in the projection.
To compare, let me define a spherical Mercator projection:
...
- 6,123
9
votes
Accepted
What's the fastest way to read a simple numerical list?
Your real problem is
I have a large .txt file
In a txt file, each number is represented by a sequence of bytes with possibly varying length followed by a ...
- 112k
8
votes
Accepted
How to plot a list of value from a .dat file?
Say, you get this with Import
data = {{"#", " time", "nu=0.01", " nu=0.25", "nu=0.50", "nu=0.75", "nu=1.0", "phi(t)=exp<-t/2)"},
{0., 1., 1., 1., 1., 1., ...
- 15.8k
7
votes
Accepted
Getting error message with Search on arXiv electronic preprint database
First I got the same error message. Using the menu bar Edit ► Preferences... and clicking the "Update Local Indices from Wolfram Research Server" button under the Internet Connectivity tab fixed this ...
- 27.4k
7
votes
Accepted
webscraping: Wolfram notebook vs browser
You can actually start and control a web browser session from Mathematica using an experimental implementation for WebDriver, Since Mathematica 11.3. Look at this answer
An example
...
- 35.9k
7
votes
Import data from a current web session?
In 11.3 you can do:
ExternalEvaluate[session, "JavascriptExecute" ->
"return document.documentElement.outerHTML;"]
In 12.0 and up, the syntax has change a ...
- 9,741
6
votes
Accepted
Performance-driven approach to using Big Data without killing the hard-drive
So, a large part of this question seems to be concerned with whether or not BinaryReadList can cause meaningful damage to an underlying drive (SSD or HDD). From ...
- 9,313
6
votes
Accepted
Downloading a number of images from a web site as a list
I wrote this in the comment, but the code did not come out properly formatted. So here it is again:
Import["https://en.wikipedia.org/wiki/Mathematica", "Images"]
- 2,651
6
votes
6
votes
Accepted
Export Data from several tabs in a website
Here is a start towards a solution, using the Chrome drivers that were introduced in 11.3. At this point, the Chrome drivers are still labeled as "experimental" and it shows. Many of the things that I ...
- 69.8k
5
votes
5
votes
Accepted
5
votes
Importing CSV with multiline text fields
Here is a code which accepts inside the fields delimited by double-quotes:
commas
carriage-returns
any character different from double-quotes
This solution is not fully compliant with the standard, ...
- 17.8k
5
votes
COVID-19 Wolfram Data Repository Retrieval
Use ResourceUpdate for this:
data = ResourceData[ResourceUpdate["Epidemic Data for Novel Coronavirus COVID-19"]];
- 7,591
5
votes
Accepted
How to import a COVID-19 data table from a website into a Mathematica notebook
( Not an answer, extended comment.)
In this particular case (the code of that site today):
...
- 37.2k
4
votes
Accepted
How to get the list of links in a Wikipedia article in order of appearance
Searke in the comments has a good idea. I found that one can get the article code with templates expanded by using query with ...
- 3,397
4
votes
4
votes
How to request financial data from Yahoo's YQL and Quandl?
Just for Quandl.
You can use Quandl's API guide and customize the data. For example, first download historical data for FaceBook.
...
- 2,299
Only top scored, non community-wiki answers of a minimum length are eligible