Access matrix values inside of a function

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Christian S. 2021-3-2

评论： Christian S. 2021-3-4

Hi MATLAB-Folks,

I'm asking with a beginner problem for your help, I searched the forum for an answer but without sucess:

I have a script, that creates a vector, lets say as an example:

>> g_x_contact=[0 0 1 2 3 4 0 0]

afterwards I'm creating a function, that uses the corresponding value of the vector within.

For example:

function Integral = pressure_integral(x)
Integral = g_x_contact(x).*(x/2)    
end

So I want the function to use the value at position x and calculate the according steps afterwards.

Here the promt-line >> pressure_integral(6) should calculated with the sixth element: 4.*(6/2)=12

Instead I get the error-Message

Unrecognized function or variable 'g_x_contact'.
Error in pressure_integral (line 6)
Integral = g_x_contact(x).*(x/2)

Can anybody give me a hint, how the access the Vector?

Thank you in advance and very best

Christian

Bob Thompson 2021-3-2

编辑：Bob Thompson 2021-3-2

I believe this is the purpose of global variables, but I could be wrong. I don't really use them much.

Stephen23 2021-3-2

编辑：Stephen23 2021-3-2

"I thought my targeted use for this fuction -to calculate an integral- will be problematic, if I give the function two input arguments."

It isn't problematic at all. This explains what you need:

Christian S. 2021-3-4

Thank you guys very much!

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