AssetPaths

Hello everybody. I am really desperate because I do not succeed in simulating asset paths by monte carlo simulation. Somehow, everytime I am typing in the one of the following commands:

function SPaths=AssetPaths(S0,mu,sigma,T,NSteps,NRepl)

or

function SPaths=AssetPaths(S0,mu,sigma,T,NSteps,NRepl) or

paths=AssetPaths(...)

I get the following message:

??? function SPaths=AssetPaths(S0,mu,sigma,T,NSteps,NRepl) | Error: Function definitions are not permitted in this context.

Can someone please help me? Maybe I am missing the AssetPaths.m file?

Thanks for every answer

Kind regards dominic

Answer 1

[Oleg Komarov]

You can declare a function only in a separate m. file and only as the very first line. So for example the following script will give the same error:

a = 10

function out = hi(a)
end

[Walter Roberson]

Minor variation: function must be the first non-blank non-comment line.

[知有]

请问你可以提供一下定义该函数的内容吗 十分感谢

Answer 2

[lavistacrunchy]

Thanks for the quick response. Unfortunately I still don't get, how I can make it work. Does your answer mean, that I cannot enter the function in the command window or in a script file?

I am currently using version 7.12.0 (R2011a).

[lavistacrunchy]

This is what I typed in at first:

>> function [SPaths]=AssetPaths(S0;mu;sigma;T;NSteps;NRepl)

??? function [SPaths]=AssetPaths(S0;mu;sigma;T;NSteps;NRepl)

|

Error: Function definitions are not permitted in this context.

>> S0=50;

>> mu=0.04;

>> sigma=0.3;

>> T=1;

>> Nsteps=365;

>> NRepl=3;

>> function [SPaths]=AssetPaths(S0;mu;sigma;T;NSteps;NRepl)

??? function [SPaths]=AssetPaths(S0;mu;sigma;T;NSteps;NRepl)

|

Error: Function definitions are not permitted in this context.

So, when it didn't work, I tried this:

>> S0=50;

>> mu=0.04;

>> sigma=0.3;

>> T=1;

>> Nsteps=365;

>> NRepl=3;

But both ways didn't work.

Does anybody know, what might be the problem. If not in the command window, where do I have to type in the command?

[Walter Roberson]

Correct, you cannot enter function definitions at the command window or script file. You must put them in to a function .m file.

[Walter Roberson]

At the command window,

edit AssetPaths

and paste in the code and save the file as AssetPaths.m

Answer 3

[Angus]

You need to put the function AssetPath in a separate m-file that is named the same as the function.

eg: file 1: AssetPaths.m

function results = AssetPaths( ... )

statements

end

now you can invoke a call to AssetPaths on the command line like

>> paths = AssetPaths( ... input variables)

Answer 4

[Anirban Naskar]

Is there any in-built function called "assetpaths"?