how do I reshape an array into a matrix that has dimensions of (user indicated number) by 4?

I initially tried to reshape the array using parameters=reshape (parameter, component, 4)

where parameter and component were user defined but it took me from: parameter =

1 2 3 4 1 2 3 4 1 2 3 4

to parameters =

     1     4     3     2
     2     1     4     3
     3     2     1     4

How do I get it to cut the array after every fourth number instead of every third?

Answer 1

[Paulo Silva]

parameter =[1 2 3 4 1 2 3 4 1 2 3 4]
reshape(parameter,4,3)

Answer 2

[Walter Roberson]

component should not be user-defined if you are using reshape(parameter,component,4) . reshape requires that the number of elements be unchanged, so if you have 4 as your last item in reshape, then component must either be [] or numel(parameter)/4

If you have a vector that is to be reshaped and the data is to go across rows, and the number of columns per row is C, then you would use

reshape(Vector, C, []).'

Yes, the first part of this expression does create C rows rather than C columns, but the ".'" flips the rows and columns so that you end up with C columns. It works, try it.