MATLAB: How to combine these answers into a matrix

for loopsMATLABmatrix

Here is the code I have.

A=[1;13;15;20;23;27];
for k=2:6;
    [index_diff]=A(k,1)-A(k-1,1)
end

I would like to put the answers (12,2,5,3,4) into a 5 by 1 matrix. How do I do this?

Best Answer

diff(A)

will do this.

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MATLAB: Why the size function for matrix count less

Hi,

You are getting error, because inside loop, you are deleting rows from the matrix so it's not of the same size as you computed earlier. Better would be to put results in a different matrix.

i.e.

matrix2 = [];
for k=1:rows   
    if matrix (k,1)<matrix(k,2)  
        matrix2= [matrix2; matrix(k,:)];
    end               
end

MATLAB: Create a simple table from using data from other table and an Iteration loop

If you are really using the table datatype (as the error message suggests), then you are not indexing it properly. A table has variables, and you can index those as you are trying to do. So, I imagine you would need something like

for i=2:20
    k=time.time(i)-time.time(i-1);
    dt(i-1)= k;
end

It is a bit confusing to use 'time' as the name of both a table and a variable within that table, though you can do that if you want.

Looking at your code, though, I wonder why you need to use the table datatype at all. Why not just have a vector for time and a vector for dt?

Best Answer

Related Solutions

MATLAB: Why the size function for matrix count less

MATLAB: Create a simple table from using data from other table and an Iteration loop

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