Threedimensional Matrices SOEST（三维矩阵,）.pdf

Three-dimensional Matrices • Useful for representing a function of 3 variables [e.g., temperature in a volume; T = f(x,y,z)] • Creating a 3-D matrix • Size of a 3-D matrix • Reshaping matrices • Addressing elements in a 3-D matrix • Creating a 3-D matrix with meshgrid • 3-D visualization GG250 F-2004 Lab 10-1 Three-dimensional Matrices GG250 F-2004 Lab 10-2 Creating 3-D Matrices (zeros) q = zeros(2,4,3) q(:,:,1) = 0 0 0 0 0 0 0 0 q(:,:,2) = 0 0 0 0 0 0 0 0 Layer 1 q(:,:,3) = Layer 2 0 0 0 0 0 0 0 0 Layer 3 GG250 F-2004 Lab 10-3 Creating 3-D Matrices (ones) B = ones(2,4,3) B(:,:,1) = 1 1 1 1 1 1 1 1 B(:,:,2) = 1 1 1 1 1 1 1 1 Layer 1 B(:,:,3) = Layer 2 1 1 1 1 1 1 1 1 Layer 3 GG250 F-2004 Lab 10-4 Creating 3-D Matrices (rand) A = rand(2,4,3) A(:,:,1) = 0.9501 0.6068 0.8913 0.4565 0.2311 0.4860 0.7621 0.0185 A(:,:,2) = 0.8214 0.6154 0.9218 0.1763 0.4447 0.7919 0.7382 0.4057 Layer 1 A(:,:,3) = Layer 2 0.9355 0.4103 0.0579 0.8132 0.9169 0.8936 0.3529 0.0099