how to create matrix from a row vector of different elements?

Question

scobug411 2020-9-8

编辑： Adam Danz 2020-9-8

for example creating y=[1 3; 2 4; 3 5] using A=[1:5]

i cannot use reshape because its a different number of elements

Adam Danz 2020-9-8

编辑：Adam Danz 2020-9-8

What rule are you using for that transformation? For example, what would be the output for A=1:6?

Also, relace() is used with strings so why would you use that in the first place? Or are you using a different funcition with the same name?

For the example in your question,

y = reshape(A([1:3,3:5]),[],2);

but that won't work if A has a different length.

Answer 1

Star Strider 2020-9-8

The first and second columns are consecutive elements of ‘A’ although with an offset for the second column.

This is likely the easiest way:

Y = [A(1:end-2); A(3:end)].';

.