JSON (JavaScript Object Notation) is a lightweight data-interchange format. The Stackexchange API delivers its data using this format. The tags is meant for questions about reading and interpreting JSON.

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7
votes
1answer
103 views

Export dataset to JSON

I'm experiencing a weird issue. Consider a dataset defined like this: dataset = Dataset[{<|"a" -> 1, "b" -> 2|>, <|"a" -> 3, "b" -> 4|>}]; ...
1
vote
0answers
59 views

JSON problem? MMA10, Windows 7 or Linux Mint

I want to test Mathematica 10 to import various data format. In this case, I have a JSON file with the following data and structure: ...
3
votes
1answer
183 views

How can I create an empty JSON object?

For creating non-empty object, I use following syntax ExportString[{"key" -> "value"}, "JSON"] (*{"key" : "value"}*) But how can I create an empty object? ...
7
votes
1answer
369 views

How to request financial data from Yahoo's YQL?

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.
6
votes
1answer
158 views

Efficient JSON parser for Mathematica

Im looking for a efficient way of parsing JSON data in Mathematica. I am having a lot of problems with ImportString because it uses Java, is too slow, and uses too ...
6
votes
1answer
242 views

How to import a large (~50Mb) json file in mathematica

I am trying to import a 46Mb json file into mathematica (which by the way I exported using mathematica) but its failing with the following messages: ...
12
votes
3answers
186 views

Wrong numerical value while exporting to a JSON string

The following code: ExportString[{"a" -> 2000000., "b" -> 0.000001}, "JSON"] Gives the results ...
5
votes
1answer
393 views

Importing specific elements from JSON

I'm having trouble importing JSON in the way I expect, based on my reading of the documentation. The particular issue I'm having is with importing a specific element, or list of elements. From the ...
18
votes
1answer
608 views

xkcd: Geohashing in Mathematica

On May 21, 2008, an xkcd comic proposed a method for creating a random, local meeting place that can't be determined until the day of the meeting. This method is usually used for xkcd fan events, ...
19
votes
2answers
1k views

Extracting values from nested rules in JSON data

I have been using Mathematica to analyse some data from the StackExchange API. It is conveniently available in JSON form, which Mathematica interprets as replacement rules. However, some of the rules ...
8
votes
2answers
373 views

Exporting held expressions through JSON

Trying to round-trip expressions through JSON, I'm getting unexpected errors for held expressions, and would be grateful for advice or clues. Consider, first, something that works well ...