Combining vectors in a for loop to form a final matrix

Hi there,

I am writing a script to solve problems using the Moment Distribution Method for structural analysis. I have 4 loops that generate row vectors. What I want to do is combine the final calculated vectors into one large matrix. Here is the code:

DF = [0 0.625 0.375 0.6 0.4 0];
FEM = [-10 10 -18 12 -16 16];
MBal = [FEM(2)+FEM(3) FEM(4)+FEM(5)];
if MBal < 0
    MBal = abs(MBal);
end
Fdistribution = [0 DF(2:3)*MBal(1) DF(4:5)*MBal(2) 0];
for i = 1:4
Fdistribution([1,2,3,4,5,6]) = Fdistribution([2,1,4,3,6,5]);
Carry_over = Fdistribution./2;
idistribution = [ 0 Carry_over(3).*DF(2:3) Carry_over(4).*DF(4:5) 0];
    if idistribution >= 0
        idistribution = -idistribution;
    else idistribution = abs(idistribution);
    end
    Fdistribution = idistribution;
      if i == 4
        idistribution(1) = idistribution(2)/2;
        idistribution(6) = idistribution(5)/2;
      end
      Table = [Carry_over; idistribution]
end

Table = 2×6

2.5000 0 1.2000 1.5000 0 0.8000 0 -0.7500 -0.4500 -0.9000 -0.6000 0

Table = 2×6

-0.3750 0 -0.4500 -0.2250 0 -0.3000 0 0.2812 0.1687 0.1350 0.0900 0

Table = 2×6

0.1406 0 0.0675 0.0844 0 0.0450 0 -0.0422 -0.0253 -0.0506 -0.0337 0

Table = 2×6

-0.0211 0 -0.0253 -0.0127 0 -0.0169 0.0079 0.0158 0.0095 0.0076 0.0051 0.0025

Basically I want to combine the vector 'Table' so its displays all the Table vectors together. So, I would have a 8 by 6 matrix.

Can anybody help please? Then I can manipulate the matrix and sum up the columns.

Many thanks for any help.

Answer 1

[Mathieu NOE]

For small tables / arrays I don't pay too much attention to preallocation (but it's important if you are dealing with large data !!)

so the basic approach here is simply to concatenate your results

DF = [0 0.625 0.375 0.6 0.4 0];
FEM = [-10 10 -18 12 -16 16];
MBal = [FEM(2)+FEM(3) FEM(4)+FEM(5)];
tmp = [];
Table = [];
      
if MBal < 0
    MBal = abs(MBal);
end
Fdistribution = [0 DF(2:3)*MBal(1) DF(4:5)*MBal(2) 0];
for i = 1:4
Fdistribution([1,2,3,4,5,6]) = Fdistribution([2,1,4,3,6,5]);
Carry_over = Fdistribution./2;
idistribution = [ 0 Carry_over(3).*DF(2:3) Carry_over(4).*DF(4:5) 0];
    if idistribution >= 0
        idistribution = -idistribution;
    else idistribution = abs(idistribution);
    end
    Fdistribution = idistribution;
      if i == 4
        idistribution(1) = idistribution(2)/2;
        idistribution(6) = idistribution(5)/2;
      end
      tmp = [Carry_over; idistribution];
      Table = [Table; tmp];
end

Table

Table = 8×6

2.5000 0 1.2000 1.5000 0 0.8000 0 -0.7500 -0.4500 -0.9000 -0.6000 0 -0.3750 0 -0.4500 -0.2250 0 -0.3000 0 0.2812 0.1687 0.1350 0.0900 0 0.1406 0 0.0675 0.0844 0 0.0450 0 -0.0422 -0.0253 -0.0506 -0.0337 0 -0.0211 0 -0.0253 -0.0127 0 -0.0169 0.0079 0.0158 0.0095 0.0076 0.0051 0.0025

[Scott Banks]

Thank you very much for your help, Mathieu!

[Mathieu NOE]

my pleasure !!