i have some problem in my code as call function and other syntax error .... anyone can help me to run the code correctly ..... the attachment files below

please i applied the step to call function but doesnt success .... help me please

Answer 1

[Walter Roberson]

You have

    Y lable (['Temperature\T_',num2str(jdx),' (c)'])
    x lable ('Time')

Those are not valid commands. The commands are ylabel() and xlabel()

[Moath Maqableh]

Before it, I have a problem when I call the function.

Can you run the code in our laptop and show the error?

How can I preview results in table like this:

[Image Analyst]

With fprintf() you can make it have a completely custom look like that. Study up on the fprintf() function - it's very useful to learn.

[Ameer Hamza]

@Moath, your function Derivatives() contains several syntax errors. For example

hc.g-a = 5.7+(3.8*V_mat(i,j));

What does this mean? This is not a valid MATLAB syntax. I cannot suggest a solution because I don't know what is your intended result from this line. Unless you correct it, you will not be able to run your code.

[Moath Maqableh]

does you mean why i put i , j in v_mat

[Moath Maqableh]

this should be inside the two for loops because there is a 9 values for v i suggest that but may be wrong you can remove (i,j) from statment .... i think like that to make results in future in table

[Moath Maqableh]

i have two variable with 9 values .... v_mat and I_mat .... how i can use one value every run to obtain 9 resulte for all vaiables

[Ameer Hamza]

No, I mean what is on the Left-hand side of =. The left side should only contain variable in which you want to store value.

[Moath Maqableh]

you can change variable name to hcga . i used it more than one time so change all of them you can named to any correct name .... not a problem

[Moath Maqableh]

change from hc.g-a to hcga and check if not have error to run

[Moath Maqableh]

i named the variable by this name 'hc.g-a' this between ' ' is the variable name

[Ameer Hamza]

This is not a valid variable name in MATLAB. Even changing them have no effect because I just realized that all of these lines are placed after the end keyword. So they are not part of the function. Also in the function, the variables mCp_mat, Q_mat, Ib, Ibw are not defined. You need to correct the file Derivatives.m. Again, as I said previously, I have no idea what are you trying to do in this function, so it is impossible for me to suggest a solution.

[Walter Roberson]

Undefined function or variable 'Derivaties'.

because the function name is Derivatives

Your Derivatives code has an "end" on line three and then a bunch of lines of code that are outside of any function. Those lines of code include a number of lines such as

hc.g-a = 5.7+(3.8*V_mat(i,j));

which has a subtraction on the left hand side. We cannot tell if you are trying to set up an equation or if you should be using something like hc.g_a as the variable name (that seems more likely)

Your code in Derivatives refers to i and j, but you do not initialize those so they are going to refer to the imaginary unit, sqrt(-1)

Your code in Derivatives uses mCp_mat which does not exist inside that function. MATLAB is not going to look in the calling function in hopes of finding a variable with that name. You need to pass mCp_mat into the function. See

http://www.mathworks.com/help/matlab/math/parameterizing-functions.html