Questions tagged [entity]

Questions about Entity expressions and the use of standardized representations of specific real-world entities.

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7 votes
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Multiple Filters on EntityClass Issue

I'm trying to get a subset of companies using EntityClass by revenue and industry but it won't let me combine the properties? See below example, I can find Walmart via revenue or industry but not by ...
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4 votes
1 answer
28 views

Convert Company Entity to Finance Entity

Is there an easy/straightforward way to get the corresponding Finance entity given a Company entity if it’s available? I have a hack-y fix just y taking the “Name” property for the Company and ...
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2 votes
1 answer
64 views

How to prevent output of Entity object in EntityValue?

By default, no matter ElementData["Hydrogen", "DiscoveryCountries"] or ...
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3 votes
0 answers
37 views

Does ElementData have less information than Element Entity?

...
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2 votes
0 answers
46 views

Compute the borders and overlap of two HistoricalCountry entities?

For CountryData, we can take the property "BorderingCountries", providing us with a notion of whether two countries border each other. But for two HistoricalCountry entities, where we only ...
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1 vote
0 answers
31 views

EntityPrefetch does not speed up EntityClass queries

For example, we can run EntityPrefetch["Element"] to prefetch information related to Entity type "Element". And it shows on my computer ...
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2 votes
0 answers
48 views

Is it possible to query an entity store created from a dataset?

Mathematica Dataset is unfortunately no built on top of relational algebra principles. If it were all datasets would be relations and all operations on datasets would also return relations (non ...
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5 votes
1 answer
168 views

How to get the expression of a special function?

How to get the expression of a special function? Like gamma function: Gamma[z]=Integrate[t^(z-1)/e^t, {t, 0, Infinity}]
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3 votes
1 answer
72 views

How to find all coastal cities globally using the Entity framework?

It seems to be an easy task as all the related functions GeoNearest and EntityList["City"] are close at hands. However,...
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  • 4,157
0 votes
1 answer
50 views

How do I specify a time for astronomical entity data?

I'm fascinated by the capability of the astronomical data available in V13. (Running 13.0.0.0 on a Mac M1.). Certain data such as altitude and azimuth for a star position should be time dependent but ...
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  • 201
0 votes
1 answer
80 views

How to create a dataset out of the entities?

I am working on learning how to create a dataset from a series of entities. I have the following function that finds all properties of a certain entity: ...
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0 votes
0 answers
32 views

How to keep track of multiple properties of entities?

I have the following lines of code: ...
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-3 votes
1 answer
99 views

How to find the distances to all buildings quickly?

I would like to create an association by mapping the function GeoDistance[Here,#]& over all buildings without missing locations in a reasonable amount of time less than 30 minutes. I have the ...
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-2 votes
1 answer
70 views

How to use the Wolfram Language Symbol entity type to list all the entity types? [closed]

I would like to map EntityValue[#,"SampleEntities"] over all the domains of entities, but before I spend 20 to 30 minutes typing every single entity, I would like to be aware of any way to ...
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1 vote
1 answer
77 views

Why does Entity Class return an empty value sometimes?

I am working on computing the 20 largest cities in California. ...
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-1 votes
2 answers
55 views

How to extract entities from TravelDirectionsData?

I am wondering how to extract entities such as states and cities from TravelDistanceData. For example, given the following example from the documentation, how could I extract the states the route goes ...
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4 votes
0 answers
61 views

Accelerate the retrieval time for Entity data

I like to use Mathematica to answer questions related to cities such as how many cities in the United States have a population greater than 100,000 and what the distribution of them would look like on ...
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1 vote
0 answers
56 views

How to find N most populous cities in each state with TakeLargest and Entity Functions without waiting forever using Caching?

I am interested in using Entity Functions such as EntityValue, FilteredEntityClass, EntityFunction, EntityClass, EntityList, and GeoEntities to help me find N most populous cities in each state. I ...
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2 votes
0 answers
33 views

handling network errors during polling an entity

Notebook with a not working draft to solve the problem: https://drive.google.com/file/d/1EvrrsIGD554eTKZ6TX6p_vThRgb1NdWH/view?usp=sharing Hello, I use Entity["Isotope",...] to calculate ...
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1 vote
1 answer
92 views

How to output Polygon with latitude and longitude set in EntityValue function?

I used EntityValue to represent a map of a country. ...
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  • 1,091
2 votes
1 answer
66 views

Comparing amino acids in Mathematica nutrition data

Essential amino acids for lentils and barley can compensate each other: what the one does not have, the other has. How can I find that in the nutrition database? I can find such in old tables but can ...
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  • 31
4 votes
1 answer
109 views

Looking for the documentation of "AtomicLevel" specifications

New to version 12, one can retrieve a really extensive data base entities about chemical elements. It is initiated via Entity["Element",name] For example,...
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  • 205
2 votes
0 answers
70 views

Engineering materials entity class

Are there any Entity Class like EntityClassList["Mineral"] to get physical properties of "Materials" like steel alloys, polymers, ceramics or ...
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1 vote
0 answers
90 views

OceanData not deep enough or just too deep for me?

It's exciting to see Mathematica/Wolfram Alpha addressing the marine realm in Version 12.2. Evidently, I was unaware that such data existed since Version 12.0 introduced in 2019. However, I have two ...
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3 votes
1 answer
72 views

How to determine population from a list of arbitrary jurisdictions (cities, states, counties, et al.)?

I am an aspiring data scientist who's working on a passion project, namely to assign danger-level scores to police departments in the United States. One specific metric I'm developing results from ...
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1 vote
2 answers
79 views

Having trouble getting map data for the Maldive Islands

I change the island and GeoRange from the example, but it shows the error, can anyone help me with that? Follow link as the original example(The first and second pictures) : https://risu.io/SOmU ...
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  • 11
0 votes
1 answer
49 views

Why cannot I get MaldiveIslands EntityClass?

Why cannot I get MaldiveIslands EntityClass?
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  • 11
2 votes
1 answer
118 views

How to identify gender and family roles of characters in novel excerpts?

I am playing with Natural language programming in Mathematica, and can't figure out how to extract the entity classes (i.e. male, female) for the following example text: "This was a pleasant ...
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1 vote
1 answer
54 views

EntityValue evaluation behaviour

I'm puzzled by a behaviour of EntityValue, where I find it being unevaluated. Here is a minimal example. Consider the following custom ...
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  • 377
6 votes
3 answers
364 views

How can I get material property data past what's provided via ElementData[], ChemicalData[], etc.?

Background Let's say I want information (e.g. bulk modulus or space group) on an element or chemical compound that isn't available via e.g. ElementData[], ...
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  • 493
0 votes
0 answers
53 views

Can I get atomization energy of a chemical?

A pretty basic property of a chemical is the atomization energy. Another similar property is the heat of formation. I'm looking at ...
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  • 277
8 votes
2 answers
258 views

When looking at a chemical's bond lengths, which bonds do they represent?

Looking at, for example, the bond lengths of styrene: ...
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  • 277
2 votes
1 answer
63 views

EntityValue timeout

Bug in 12.1.1 and possibly earlier versions Acknowledged by WRI as an issue CASE:4617646. ...
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2 votes
1 answer
64 views

Obtaining underlying nutrition data from "NutritionLabel"

I would like to extract the underlying nutritional data contained in "NutritionLabel" output from Wolfram Alpha for all of the "Vegetables" defined in the "BasicFoodGroup"...
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  • 647
2 votes
2 answers
89 views

EntityFunction for Relational Database error [closed]

I am a student and I am new of Mathematica. I am working with relational databases and I am following the guide "Relational Database quick start" find here: https://reference.wolfram.com/language/...
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4 votes
2 answers
43 views

Is TimeZoneOffset broken?

I just realized that code like this: TimeZoneOffset[Entity["City",{"SaoPaulo","SaoPaulo","Brazil"}],0,{2020,1,1}] does not return a timezone value anymore. I am ...
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3 votes
1 answer
65 views

EntityClass Downloading Speedup

Running this command. Trying to get all cities more than 1 million people in US. ...
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  • 590
4 votes
0 answers
60 views

Why am I getting incorrect result from EntityClass?

Suppose I want get 6 largest companies by market capitalization. I try the class using the old syntax: ...
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  • 8,105
2 votes
0 answers
54 views

How to Return All Mathematica Functions in a Domain

We know that Names["System*"] and WolframLanguageData[] both return the list of all System or "native" functions. Is there a ...
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  • 1,117
1 vote
0 answers
59 views

Can one update entities in a custom EntityStore?

As far as I can see from the documentation there is no upsert (update-insert) if you have created/registered a custom store. The only way seems to re-register the whole store if you wish to upsert ...
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1 vote
0 answers
24 views

How to use normal Entity functions on new ExternalIdentifier objects (e.g. Wikidata)?

Is there any way to use the built-in EntityXXX on ExternalIdentifier objects? For me, it's more intuitive and easier to use <...
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  • 30.3k
3 votes
1 answer
122 views

How to search an entity list?

I'm using the Wolfram General Topology EntityStore. From it, how would I search EntityList["GeneralTopologyTheorem"] to find, ...
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  • 11.3k
5 votes
0 answers
110 views

Speeding up postgres queries in v12.1?

New in v12.1 is the ability to connect to Postgres. I have a Postgresql database with a few million images (stored as byte data). Each image retrieval is ~10 seconds, so I need to speed it up! But how ...
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  • 30.3k
6 votes
1 answer
105 views

RelationalDatabases and dates (Mathematica 12)

As related to the new database functionality in version 12, I am trying to retrieve a specific entity (row) or group of entities (multiple rows) between a date range in an MS SQL database. The ...
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2 votes
1 answer
37 views

Extract Velocities from Qualified EntityValue output

I have following statement: EntityValue["Planet", "VelocityAroundSun", {"Date" -> DateObject[{2020, 2, 19}, "Day", "Gregorian", 1.]}] and get the required ...
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  • 21
2 votes
0 answers
41 views

Why is GeoHistogram messing with the Bins?

Consider some precise location data as follows: ...
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  • 8,105
4 votes
1 answer
90 views

Make it fast to answer lots of similar Entity questions

I've done a EntityPrefetch[EntityClass["ZIPCode"]] but I'm not at all sure it's helped. I want to get every zip-code's address. The obvious way to do this is: <...
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9 votes
1 answer
283 views

How to manipulate date in SQL via the EntityFramework?

I have an MicrosoftSQL Server database connected to entity framework as follows: ...
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  • 8,105
0 votes
0 answers
73 views

How to add the custom polygon to Entities?

Suppose I get the polygon data using the method here: How to get Polygon for a city from GeoJSON? Now how do I add it to the Entities so they make use of it? I ...
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  • 8,105
1 vote
1 answer
58 views

How to map a list of entities into a function?

x = RandomChoice[CountryData[]] Here I have defined x to be a random country. ...
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