how to have A and A' show 3x2 column vector

so for A = [1 2 3; 4 5 6]

I want A AND A' to BOTH display:

1 4

2 5

3 6

Answer 1

[Walter Roberson]

You will need to create a new class that is derived from double, and for the new class you will need to either change the vertcat() and horzcat() operators, or else the disp() or display() function; which of the methods you override depends upon whether you want the result of constructing A to be a 3 x 2 array (despite the array seemingly having been constructed as 2 x 3), or if instead you only need A to display as-if it is 3 x 2 .

[carly]

i set A = A'

but now only A gives me the 3x2 vector. im not sure how to have A' also give me the 3x2 vector as well

[Walter Roberson]

Once you have done the A = A' you have overwritten A with a 3 x 2 array. Now when you do A' you are asking to process that new array and take the transpose of it, getting back a 2 x 3 array.

The situation is the same as if you had done

B = A'

but expected B and B' to be the same as each other.

Remember that ' is an operator, not part of a variable name.

A = A'

is not

A = A_prime

after which testing

A == A_prime

would be expected to work. Instead A = A' is A = ctranspose(A)

[carly]

if i have made a function program named "test" where i turn inches into feet AND inches, i want test([74 73 71]) AND test([74 73 71]') to give me the ft and inches in this format:

6 2

6 1

5 11

i have already made the entire script that gives me the conversions, i just need help with the formatting

74 gives 6 2

73 gives 6 1

71 gives 5 11

[Torsten]

If you allocate the output "out" of "test" as

out = zeros(numel(in),2)

where "in" can be either [74 73 71] or [74 73 71]', "out" will have the desired format.

[carly]

all it gives is a bunch of zeros

[Torsten]

test([74 73 71])

ans = 3×2

6 2 6 1 5 11

test([74 73 71]')

ans = 3×2

6 2 6 1 5 11

function inch_and_feet = test(feet)
  feet = feet(:);
  rest_feet = mod(feet,12);
  inch = (feet-rest_feet)/12;
  inch_and_feet = [inch rest_feet];
end

[carly]

oh my god youre amazing thank you! very helpful answer, tested out your code and found i just needed to add the (:)