help to use for loop in four layer

hi

can enyone help me to write following code lines with use of for loops

p & ommega & v matrices are as follow:

v=zeros(6,3);
for i=1:3
v(4:end,i)=1+2*i;
end

ommega=zeros(6,3);
for i=1:3
ommega(4:end,i)=75+25*i;
end

p=zeros(6,3);
for i=1:3
p(4:end,i)=0.1*i;
end

Answer 1

[Stephen23]

Without loops:

>> [X,Y,Z] = ndgrid(1:3);
>> A = permute(cat(3,p(:,Z),ommega(:,Y),v(:,X)),[1,3,2]);

And checking with some examples:

>> [p(:,1),ommega(:,1),v(:,1)]
ans =
  0  0  0
  0  0  0
  0  0  0
  0.1  100  3
  0.1  100  3
  0.1  100  3
>> A(:,:,1)
ans =
  0  0  0
  0  0  0
  0  0  0
  0.1  100  3
  0.1  100  3
  0.1  100  3
>> [p(:,1),ommega(:,3),v(:,2)]
ans =
  0  0  0
  0  0  0
  0  0  0
  0.1  150  5
  0.1  150  5
  0.1  150  5
>> A(:,:,8)
ans =
  0  0  0
  0  0  0
  0  0  0
  0.1  150  5
  0.1  150  5
  0.1  150  5
>> [p(:,3),ommega(:,3),v(:,1)]
ans =
  0  0  0
  0  0  0
  0  0  0
  0.3  150  3
  0.3  150  3
  0.3  150  3
>> A(:,:,25)
ans =
  0  0  0
  0  0  0
  0  0  0
  0.3  150  3
  0.3  150  3
  0.3  150  3

[ali alipour]

thank you very much

my problem was solved

but can do this with loops?

[Stephen23]

"but can do this with loops?"

Of course: preallocate A and then use indexing. You could generate the indices before the loop (e.g. using ndgrid) or inside the loop using division and modulo operations.