MATLAB FINANCIAL DERIVATIVES TOOLBOX Uživatelský manuál stáhnout pdf (Strana 27)

functions element-wise. The

h of the above vector is obtained via the

following command:

Matlab’s command:

>> length(y)

Matlab’s response:

ans =

Note that

h is a build-in function that given a vector, it returns its

length. Since the result of this function is not stored in a user-defined

variable, Matlab saves the result in the

s variable. If it is need to save the

vector’s length to a variable named

h the command would be:

Matlab’s command:

>> Ylength=length(y)

Matlab’s response:

Ylength =

With Matlab, vectors can be easily multiplied by a scalar and added or

subtracted with other vectors of similar length. Moreover, a scalar can be

added or subtracted to or from a vector and smaller vectors can be used to

construct larger ones. All these operations are performed element-wise. Note

that each vector represents a variable. Some examples follow:

Matlab’s command:

>> a=[-1 2 -3]; b=[2 1 2];

>> c=5*a

Matlab’s response:

c =

-5 10 -15

Comments:

An element-by-element multiplication of vector

a by 5.

1 2 ... 22 23 24 25 26 27 28 29 30 31 32 ... 118 119

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MATLAB FINANCIAL DERIVATIVES TOOLBOX Uživatelský manuál Strana 27