Load from ASCII (Frequency Domain) Express VI

LabView Acquire Signals Express VIs

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Load from ASCII (Frequency Domain) Express VI

Owning Palette: Load/Save Signals Express VIs

Installed With: LabVIEW SignalExpress

Imports data from an ASCII file.

Dialog Box Options

Parameter

Description

Imported Signal

Displays the signal imported from an ASCII file.

Parse File

Contains the following options:

Import file path—Specifies the name and location of the file you want to import. You can specify an absolute or relative path to the file. If you specify an absolute path, this step saves the path with the project. If you specify a relative path and you do not save the project, this step assumes the path is relative to the My Documents folder. If you specify a relative path and you save the project, the path is relative to the location where you save the project.
File preview—Displays a preview of the contents of the file to help you determine how to parse the parameters. By default, File preview displays the first 50 rows from the file. If you increase the value in Start row, File preview displays 50 rows beginning with the row you specify in Start row. You can resize the column header to show more or less of the column.
File Parsing Settings—Contains the following options:
- Delimiter—Specifies the delimiter to use to separate data. The default is Tab. This option appears only if you set Export file type to Generic ASCII (.txt).
- Custom Delimiter—Specifies a file delimiter other than a tab or a comma. This option appears only if you set Export file type to Generic ASCII (.txt).
- Start row—Specifies the row from which to begin displaying data. The default is 1.
- End row—Specifies the last row to display data. The default is –1, which specifies to display all data.
- Signal names precede data row—Specifies that the first row of the file contains the signal names.
- Decimal point—Specifies which character to use as the decimal point. The default is . (dot).
- Domain—Specifies the data type of the output signal.

Import Signals

Contains the following options:

Signals—Lists the signals in the file and specifies which signal the Imported Signal graph displays.
Import—Specifies whether to import the selected signal from the file you specify in Import file path. If you place a checkmark in one of the Import checkboxes, LabVIEW SignalExpress exports that signal to the Project View. You can then send that signal to another step or plot it on the Data View.

Resampling Setup—Contains the following options:

Note When you select an input channel as your X value and specify your own df, LabVIEW SignalExpress resamples the waveform according to the new df and based on the selected X values. This may change the number of data points in the output waveform.

Input X values—Specifies the X data to use for resampling. Options include None (default) or Point Index.
Interpolation mode—Specifies the interpolation method. Options include Coerce, Linear, or Spline. The default is Coerce.
User specified df—Specifies the interval size that represents the sampling step size to use to obtain data.
Use same df—Specifies whether to use the same df for all Signals. When you place a checkmark in this checkbox, Load from ASCII applies the df of the currently selected signal to all Signals. Select this option to group the imported Signals into one output.
Signal Type—Defines the type of frequency signal. Options include: Magnitude - linear, Magnitude - dB, Phase - degrees, or Phase - radians.

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