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Owning Class: matrix
Requires: MathScript RT Module
peakfcn2d
peakfcn2d(n)
peakfcn2d(v)
peakfcn2d(x, y)
Z = peakfcn2d(x, y)
[X, Y, Z] = peakfcn2d(v)
[X, Y, Z] = peakfcn2d(n)
[X, Y, Z] = peakfcn2d
Legacy Name: peaks
Evaluates the peak function of two variables. If you do not request an output, this function plots a peak surface in the current plot window.
Name | Description |
---|---|
x | Specifies the x-values at which to evaluate the peak function. x is a matrix. |
y | Specifies the y-values at which to evaluate the peak function. y is a matrix of the same size as x. |
v | Specifies the x- and y-values at which to evaluate the peak function. v is a matrix. |
n | Specifies the number of samples in each dimension of the evaluated function. n is an integer. |
Name | Description |
---|---|
Z | Returns the peak function evaluated at point (x, y). Z is a matrix of the same size as x. If you specify v, Z returns an m-by-m matrix, where m is the length of v. If you specify n, Z returns an n-by-n matrix. |
X | Returns the x-values at which LabVIEW evaluates the peak function. X is a matrix. |
Y | Returns the y-values at which LabVIEW evaluates the peak function. Y is a matrix. |
[X, Y, Z] = peakfcn2d(v) is equivalent to [X, Y] = meshgrid2d(v, v); Z = peakfcn2d(X, Y);. [X, Y, Z] = peakfcn2d(n) is equivalent to [X, Y, Z] = peakfcn2d(v), where v = -3:6/(n-1):3. [X, Y, Z] = peakfcn2d is equivalent to [X, Y, Z] = peakfcn2d(49). National Instruments recommends that you format x and y like the output of meshgrid2d.
LabVIEW uses the following equation to evaluate the peak: peakfcn2d(x,y) = 1 / (x^2 + y^2 + 0.3) - 1 / ((x - 1.1)^2 + y^2 + 0.4) - 1 / ((x + 0.7)^2 + (y - 1.1)^2 + 0.5) + 1 / ((x + 1.7)^2 + (y + 1.6)^2 + 0.2) + 1 / ((x + 1.4)^2 + (y - 0.7)^2 + 0.34).
The following table lists the support characteristics of this function.
Supported in the LabVIEW Run-Time Engine | Yes (if you request output) |
Supported on RT targets | Yes (if you request output) |
Suitable for bounded execution times on RT | Not characterized |
[X, Y] = meshgrid2d([1, 2, 3], [0.5, 1.5, 2.5]);
Z = peakfcn2d(X, Y)
[X, Y, Z] = peakfcn2d([1, 2, 3])
[X, Y, Z] = peakfcn2d(3)
[X, Y, Z] = peakfcn2d