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distributing two values in 3d array

Asked by Girvani Manoharan on 11 Mar 2019
Latest activity Edited by KALYAN ACHARJYA on 12 Mar 2019
I want to distribute two chosen values in 3d array. I have a below code I have created. How can I distribute only two values instead of rand() function? Much appreciate your guidance.
L=60; % Number of columns
b=25; % Number of rows
w=25; %the depth of the 3D lattice
K_f1=5e6;
K_f2=2e6;
b_centre=3;
b_sides=(b-b_centre)/2;
b_1=1:b_sides;
b_2=b_sides+1:b_sides+b_centre;
b_3=b_sides+b_centre+1:b;
A=zeros(L,b,w);
for r=1:L
for q=1:b_sides
for s=1:w
A(r,q,s)=K_f1*rand;
end
end
end
for r=1:L
for q=b_sides+1:b_sides+b_centre
for s=1:w
A(r,q,s)=K_f2*rand;
end
end
end
for r=1:L
for q=b_sides+b_centre+1:b
for s=1:w
A(r,q,s)=K_f1*rand;
end
end
end

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3 Answers

Answer by KALYAN ACHARJYA on 11 Mar 2019
Edited by KALYAN ACHARJYA on 11 Mar 2019
 Accepted Answer

How can I distribute only two values instead of rand() function?
You can fixed the value as per your need
randi([1, 2],1)/10 ;
Please replace the value 1 or 2, as per your desired value
This expression pick any one value in between 0.1 or 0.2 (Either 0.1 or 0.2)

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Answer by Rik
on 11 Mar 2019

You could also do the following:
L=60; % Number of columns
b=25; % Number of rows
w=25; %the depth of the 3D lattice
K_f1=5e6;
K_f2=2e6;
list_of_values=[K_f1 K_f2];
ind=randi(numel(list_of_values),b,L,w);%generate indexing matrix
output=list_of_values(ind);%apply the random choices
This syntax allows you to expand beyond two values and will not require you to make assumptions about the characteristics of the filler values.

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Answer by Girvani Manoharan on 12 Mar 2019

Many thanks Kalyan Acharja and Rik. Much appreciated.
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Welcome Always

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