selectdata (MathScript RT Module Function)

LabVIEW 2012 MathScript RT模块帮助

版本日期:June 2012

产品编号:373123C-0118

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(仅限Windows)

Owning Class: plots

Requires: MathScript RT Module (Windows)

Syntax

[x, y] = selectdata

[x, y] = selectdata(n)

[x, y, b] = selectdata

[x, y, b] = selectdata(n)

Legacy Name: ginput

Description

Acquires data points from the current plot by a mouse click. [x, y] = selectdata acquires data points until you press the <Enter> key. [x, y] = selectdata(n) acquires data points until LabVIEW acquires n data points or until you press the <Enter> key.

Examples

Inputs

Name Description
n Specifies the number of data points to acquire from the current plot. n is an integer.

Outputs

Name Description
x Returns the x-coordinates of the data points LabVIEW acquires. x is a vector.
y Returns the y-coordinates of the data points LabVIEW acquires. y is a vector.
b Returns the index of the mouse button you press. This function returns 1 when you press the left mouse button, 2 when you press the right mouse button, and 3 when you press the middle mouse button. If the mouse contains additional buttons, test this function to determine the value LabVIEW returns when you press those buttons. b is a vector.

Details

The following table lists the support characteristics of this function.

Supported in the LabVIEW Run-Time Engine No (returns error or is ignored)
Supported on RT targets No

Examples

X = 0:0.1:1;
Y = X.*X;
plot(X, Y, 'bo-')
[x, y] = selectdata

Related Topics

plottext

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