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MatrixMeshGridT Method |
Generates a 2-D mesh grid from two vectors a and b,
generating two matrices len(a) x len(b) with all
all possible combinations of values between the two vectors. This
method is analogous to MATLAB/Octave's meshgrid function.
Namespace: Accord.Math
Assembly: Accord.Math (in Accord.Math.dll) Version: 3.8.0
SyntaxRequest Example
View Source
A tuple containing two matrices: the first containing values for the x-coordinates and the second for the y-coordinates.
Parameters
- x
- Type: T
- y
- Type: T
Type Parameters
- T
Return Value
Type: TupleT, TA tuple containing two matrices: the first containing values for the x-coordinates and the second for the y-coordinates.
Usage Note
In Visual Basic and C#, you can call this method as an instance method on any object of type . When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).Examples
// The MeshGrid method generates two matrices that can be
// used to generate all possible (x,y) pairs between two
// vector of points. For example, let's suppose we have
// the values:
//
double[] a = { 1, 2, 3 };
double[] b = { 4, 5, 6 };
// We can create a grid
var grid = a.MeshGrid(b);
// get the x-axis values // | 1 1 1 |
double[,] x = grid.Item1; // x = | 2 2 2 |
// | 3 3 3 |
// get the y-axis values // | 4 5 6 |
double[,] y = grid.Item2; // y = | 4 5 6 |
// | 4 5 6 |
// we can either use those matrices separately (such as for plotting
// purposes) or we can also generate a grid of all the (x,y) pairs as
//
double[,][] xy = x.ApplyWithIndex((v, i, j) => new[] { x[i, j], y[i, j] });
// The result will be
//
// | (1, 4) (1, 5) (1, 6) |
// xy = | (2, 4) (2, 5) (2, 6) |
// | (3, 4) (3, 5) (3, 6) |
See Also