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NDK (.ndk)

  • Import fully supports the NDK format.

Background & Context

    • NDK seismologic file format.
    • Commonly used for storage and exchange of earthquake data.
    • Stores geographical information and wave measurements for individual seismological events.
    • ASCII format.

Import

  • Import["file.ndk"] imports an NDK file, returning all data as an array.
  • Import["file.ndk",elem] imports the specified element from a NDK file.
  • Import["file.ndk",{{elem1,elem2,…}}] imports multiple elements.
  • The import format can be specified with Import["file","NDK"] or Import["file",{"NDK",elem,…}].
  • See the following reference pages for full general information:
  • Importimport from a file
    CloudImportimport from a cloud object
    ImportStringimport from a string
    ImportByteArrayimport from a byte array

Import Elements

  • General Import elements:
  • "Elements" list of elements and options available in this file
    "Summary"summary of the file
    "Rules"list of rules for all available elements
  • Data representation elements:
  • "Data"list of records
    "EventSeries"table data as an EventSeries
    "LabeledData"data given as a list of rules
    "Labels"data record labels
    "Tabular"table data as a Tabular object
    "TimeSeries"table data as a TimeSeries
  • Import uses the "Data" element by default.

Import Options

    Import Options
  • General Import options:
  • "TimeColumn"Automaticcolumn to use for times in "EventSeries" and "TimeSeries" elements

Examples

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Basic Examples  (4)

Import the file and show the first record:

Wolfram Language code: Import["ExampleData/sample.ndk"]//First

Import summary of an NDK file:

Wolfram Language code: Import["ExampleData/sample.ndk", "Summary"]

Import the data as a Tabular object:

Wolfram Language code: Import["ExampleData/sample.ndk", "Tabular"]

Read all magnitude values from the file:

Wolfram Language code: Import[ "ExampleData/sample.ndk", {"LabeledData", "BodyWaveMagnitude"}]

Scope  (6)

List all available elements:

Wolfram Language code: Import[ "ExampleData/sample.ndk", "Elements"]

Import all available labels:

Wolfram Language code: Import[ "ExampleData/sample.ndk", "Labels"]

Import all records as a list of rules:

Wolfram Language code: Import[ "ExampleData/sample.ndk", "LabeledData"]

Import all records as a Tabular object:

Wolfram Language code: Import[ "ExampleData/sample.ndk", "Tabular"]

Import all records as an EventSeries object:

Wolfram Language code: Import[ "ExampleData/sample.ndk", "EventSeries"]

Import all records as a TimeSeries object:

Wolfram Language code: Import[ "ExampleData/sample.ndk", "TimeSeries"]

Import Options  (1)

"TimeColumn"  (1)

By default, the time column is selected automatically for "TimeSeries" and "EventSeries" elements:

Wolfram Language code: Import[ "ExampleData/sample.ndk", "TimeSeries"]

Use the "TimeColumn" option to specify the time column:

Wolfram Language code: Import[ "ExampleData/sample.ndk", "TimeSeries", "TimeColumn" -> "TimeStamp"]