Tagged Questions

Since version 7, Mathematica includes gigabytes of curated data relevant to many different fields, including physics, chemistry, graph theory, finance, geography and many more.

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9
votes
1answer
241 views

How do I determine astronomical transit times?

Mathematica, through the "legacy" Scientific Astronomer package, used to have the ability to easily determine accurate transit times of astronomical objects simply, with ...
12
votes
4answers
496 views

Calculate proportion of values for dates

At work, we were discussing when is it the best time to change to winter tires for bikes and/or cars. Using WeatherData[] and ...
9
votes
3answers
375 views

Why is AstronomicalData so slow?

I'm having trouble getting some pretty simple functions using AstronomicalData to perform at anywhere near the speed I need them to. For example, I have many ...
4
votes
0answers
126 views

Creating a PolyhedronData[] structure for custom polyhedra [duplicate]

The PolyhedronData[] structure is wonderfully rich. I would like to create data for my own polyhedra, not any of the many that Mathematica provides. Is this ...
11
votes
4answers
577 views

Why do some CountryData flags render at low resolution?

This question is related to data analysis introduced here Why do some flag images from the CountryData dataset render at very low resolution both in Front End and ...
6
votes
3answers
487 views

Getting all the countries' flags and then using them as chart labels?

What's the code to list all the world's flags? CountryData["G8", "Flag"] works to get those particular flags, but what about all the world's flags? ...
11
votes
1answer
364 views

How does Mathematica know my location?

On the AstronomicalData page in the online reference, it says for AstronomicalData["Sun", "NextRiseTime"] that it finds the ...
15
votes
1answer
368 views

CountryData and the areas of the world

If I add the WaterArea and the LandArea of the world, I get the same number as if I asked for the total area of the world in the first place: ...
14
votes
1answer
382 views

Find elements in a decay chain using IsotopeData

I am trying to write a program using the Mathematica function IsotopeData, but am finding the code troublesome. Due to my (relative) familiarity with Python, I am ...
9
votes
2answers
2k views

Problem with Financial Data

I'm following http://reference.wolfram.com/mathematica/ref/FinancialData.html I get the following: In[6]:= DateListLogPlot[FinancialData["^DJI", All]] During ...
8
votes
1answer
307 views

How to provide your own example data for a custom package?

A nice feature of the mathematica documentation is the copious use of ExampleData in illustrating functionality. I would like to provide some example data for a ...
6
votes
3answers
253 views

Determining the dates of days

I'm trying to use WeatherData[] to give me (not sure how) the temperature, humidity, wind-speed, cloud cover... at a certain location. I only want the information ...
9
votes
1answer
206 views

How can I convert the dates returned by FinancialData into decimal representation?

I'm trying to run a regression using Fit on the output of FinancialData["SPY", "Jan. 1, 2011"]. However, the dates returned ...
6
votes
2answers
270 views

How to choose variables from a list for a function and then use the solution in a subsequent function?

I am trying to calculate heating degree days and cooling degree days and output that information to a table. I am using mathematica's curated data to do this. In text this is what I would like to ...
15
votes
4answers
850 views

Finding all dictionary words that can be made with a given set of characters (Wordfeud/Scrabble)

This is a slightly more involved variant of this recent question. By sheer coincidence I happened to have been building a Wordfeud (Scrabble clone) game in Mathematica. My interactive Wordfeud ...
17
votes
3answers
929 views

Highlighting individual countries on a world map

Consider the following list of countries which I would like to highlight on a world map: ...
44
votes
4answers
5k views

How to make a 3D globe?

There are many ways to create a 3D Earth that is rotatable (see here, here, related here), but most of them have some drawbacks. These issues mainly stem from either ...
24
votes
1answer
328 views

How to save ChemicalData queries so that they are available immediately on notebook load?

If I put some viscosity (or density, ...) lookups in my notebook, such as: ...
12
votes
1answer
757 views

Why does CUDAQ (from CUDALink) download data from Wolfram servers?

I understand why functions like ElementData or CountryData need to download up-to-date data when first launched. However, when ...
7
votes
1answer
363 views

Computing Many Slow I/O Operations

In working on a custom stock screener, I often need to run mathematica code like this: ...
8
votes
2answers
270 views

WordData for other languages

Mathematica already includes dictionaries for a lot of languages. What I am looking for is a handy semantic/grammatic database for Hungarian, just like WordData for ...
1
vote
1answer
742 views

List all financial Assets data conditionally

I would like to get all the Financial Data that Mathematica respecting those constraints : The assets for which there are at least 20 years of daily price quotations. Or that have s price for each ...
41
votes
5answers
5k views

How do I plot coordinates (latitude and longitude pairs) on a geographic map?

I'm attempting for the first time to create a map within Mathematica. In particular, I would like to take an output of points and plot them according to their lat/long values over a geographic map. I ...
12
votes
3answers
819 views

Background image in a polygon / CountryData

Is it possible to use a background image in a polygon without rasterizing the polygon? I tried with textures, but they seem to be viable only for simple polygons. I want to put a flag as the ...
16
votes
2answers
615 views

Built-in Mathematica data: are they cached? how to speed up the loading?

Mathematica has numerous built-in data for science and math. Every first call to a data function in a new Mathematica session will "re-initialize indices" (download the data). Is there a way to store ...
5
votes
2answers
251 views

Why is Neptune missing from AstronomicalData?

An old notebook I've recently started working with has a strange error: Prior to version 8, a figure I generated using Drop[AstronomicalData["Planet"],-1] to ...
26
votes
4answers
604 views

Is it possible to invoke the OEIS from Mathematica?

I had always wondered if there might be a way to write a function, which I'll call OEISData[], that more or less works as a curated data function for The On-Line ...
31
votes
3answers
707 views

Is there a Mathematica API for the functions.wolfram site?

Is there a Mathematica API for the functions.wolfram site? If there's not, has anyone implemented a web scraper for it? For example it would be nice to be able to access ...