MATLAB FINANCIAL DERIVATIVES TOOLBOX Manuel d'utilisateur télécharger pdf (Page 31)

2.1.3 Transporting Vectors

To perform operation with column and row vectors of similar length, it is

first needed to transpose the vectors in order to make them either all row

vectors or column ones. The apostrophe symbol “ ' “ is used to convert a

column vector to a row one and vise versa. Remember that the length of the

vectors must match; otherwise, Matlab will return an error. Experiment with

the following examples to learn the use of transpose command.

Matlab’s command:

>> z1 = [2 -1 3], z2 = z1', z3 = z2'''

Matlab’s response:

z1 =

2 -1 3

z2 =

-1

z3 =

2 -1 3

Comments:

1 is a three element row vector.

2 is the transpose of

3 is

similar with

1 since after transposing

2 three times is similar as

transposing once the

Matlab’s command:

>> z1'+z2, z1+z2

Matlab’s response:

ans =

-2

??? Error using ==> +

Matrix dimensions must agree.

Comments:

2 operation involves the addition of two column vectors.

2 is an illegal operation since a row vector cannot be added

with a column vector.

Note that that Matlab can store empty vectors. This is done as follows:

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MATLAB FINANCIAL DERIVATIVES TOOLBOX Manuel d'utilisateur Page 31