write a function called tri_area returns the area of a triangle with base b and height h
202 vues (au cours des 30 derniers jours)
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hello this is my function code and command window code and there is a message of invalid expression at line 2 and i dont know what is the wrong can anyone help me
function [area] = tri_area([b,h]);
tri_area([b,h])=(0.5)*(b)*(h)
area=tri_area([b,h])
end
%command window
area = tri_area[3,2])
16 commentaires
Réponse acceptée
Torsten
le 9 Avr 2020
Modifié(e) : darova
le 9 Avr 2020
function area = tri_area(b,h)
area = 0.5*b*h;
end
From the command window
A = tri_area(3,2)
21 commentaires
Walter Roberson
le 26 Déc 2022
When you use the debugger and format long g then what are some sample inputs, and what is the calculated output, and what does the grading program say that the output should be?
Plus de réponses (3)
Siya Desai
le 4 Avr 2021
Modifié(e) : Siya Desai
le 4 Avr 2021
function
function [area] = tri_area (b,h)
tri_area = (0.5)*(b)*(h)
code to call your function
tri_area(2,3) %any random input
1 commentaire
Walter Roberson
le 4 Avr 2021
result = tri_area(2,3) %any random input
function [area] = tri_area (b,h)
tri_area = (0.5)*(b)*(h)
end
Pelden Chodon
le 27 Mai 2021
function [area, tri_area] = tri_area(b,h) ;
area = (0.5)*(b)*(h);
v = area(:);
tri_area = sum(v);
end
% Test that your function runs as expected before pressing Submit
[area, tri_area] = tri_area(2,3)
1 commentaire
DGM
le 4 Fév 2023
You're declaring a variable with the same name as the function you're calling. This will either throw an error or silently cause other errors, depending on where you put the function.
For scalar inputs, summing area serves no purpose. For nonscalar inputs, the results are either wrong, or will throw an error.
% summing a scalar accomplishes nothing
[allareas totalarea] = tri_area(2,3)
% some nonscalar inputs return the wrong results
[allareas totalarea] = tri_area([2 2; 2 2],[3 3; 3 3])
% some nonscalar inputs return the wrong number of wrong results
[allareas totalarea] = tri_area([2 2],[3;3])
% some nonscalar inputs fail completely
[allareas totalarea] = tri_area([2 2],[3 3])
function [allareas, totalarea] = tri_area(b,h)
allareas = (0.5)*(b)*(h); % these parentheses don't do anything
v = allareas(:);
totalarea = sum(v);
end
As this is all largely copy-pasted from other bad answers posted above, I should point out that much of these problems were already openly explained before you posted this. See also: function, array vs matrix operations
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