Hi, guys, I am trying to create a MATLAB Subrountine, but I faced some problems. My code is not working, and I don't know what is wrong with it.

Error:
("??? Error: File: EXPERI.m Line: 4 Column: 1
Function definitions are not permitted in this context.")

clc
clear

function [x] = getcond(t1, t2 , material);
%  GETCOND calculates the conductance given the two temperatures and
%  material involved.  
%INPUTS:
%  t1 - high temperature
%  t2 - low temperature
%  material - (string) material being used.
%OUTPUTS:
%  returns the conductance
%EXAMPLE:
%  result = GETCOND(300, 77, 'aluminum')

t1 = input('Enter Low Temperature');
t2 = input('Enter High Temperature');
material = input('Enter Constant, k');

%Classify according to "material"
if material = printf('aluminum_high');
   k = [0.10974, 0.019819, -7.7701e-5, 1.04e-7]*100;

elseif material = printf('steel_high');
   k = [-0.00551407, 0.001541448, -5.59e-6, 8e-9]*100;

else material = printf('Error: Do not recognize material');
   k = [0];            
end

cond = k[0]*(t1-t2)+k[1]*(t1^2-t2^2)/2.+k[2]*(t1^3-t2^3)/3.+k[3]*(t1^4-t2^4)/4;

x = cond / (t1 - t2);
end

T_1=100;
T_2=200;
K_1=getcond(T_1, T_2, 'aluminum_high')

[Walter Roberson]

What purpose are the "clc" and "clear" serving in your code?

Answer 1

[ES]

Did you write your function in command window? Unlike python, MATLAB does not let you write a function in its command window. So create an m file with your function and call it from command line.

Thanks!

[Walter Roberson]

From the error message we can see that the code was put into EXPERI.m and not the command line.

[Ilham Hardy]

It "function inside the script problem", then?

Answer 2

[Laurent]

Try to remove the first three lines ('clc', 'clear' and the empty line), then rename your file, or function, so that the filename and function name are the same. You also don't need the semi-colon behind the 'function' line.

After that I don't see why this should not work.