COM object EvVariableBase

EvApplication > EvFileCollection > EvFile > EvVariablesCollection > EvVariableBase

The EvVariableBase object gives access to information on and actions with a variable in an EV file. This includes acoustic, virtual and other Echoview variables.

You can use the EvVariableBase object to determine if the variable is an acoustic variable or a virtual variable. With this knowledge you can proceed to use the methods and properties of the EvVariableAcoustic object or the EvVariableVirtual object.

The EvFile.Variables[] property lists all of the variables in an EV file and is an EvVariablesCollection.

EvVariable base methods and properties:

AddVariable
AsVariableBase
AsVariableAcoustic
AsVariableVirtual
CloseAssociatedViews
ExportData
ExportEVD
ExportEVDRange
ExportSettings
ExportTrackToImage
Name
Useable
VariableType

Description

ExportData

ExportData(string FileName, int FirstPing, int LastPing, double MaxFileSizeMB)

Summary

Export the data for the current variable. ExportData includes support for acoustic, position, attitude and distance variables.

Parameters

FileName
The name of file and path to export data to.
FirstPing
The ping to begin data export.
LastPing
The ping to end the data export.
MaxFileSizeMB (optional)
Specifies the Target file size (MB) (refer to Export options).
The default is -1 and exports a single file.

Return

True, if successful.

Notes:

Exports to a nominated filename with a default .csv extension (if no extension is specified). Other file extensions such as .mat (MATLAB) can be specified.
To export a whole echogram when the start and stop ping numbers are unknown, use -1 for the FirstPing and LastPing. For example:
```
EvVar.ExportData "C:\Echoview exports\Test.mat", -1,-1, -1
```

COM object EvVariableBase

Summary

Parameters

Return

See also