Need help with "??? Undefined function or variable 'limit_2'. The first assignment to a local variable determines its class."
1 Ansicht (letzte 30 Tage)
Ältere Kommentare anzeigen
Alex Damaratski
am 31 Mär. 2020
Kommentiert: Alex Damaratski
am 4 Apr. 2020
Hello everyone. I have a task to create a programm with mex file but now i faced with diffuculties.
I entered my function and code.
I need to generate matrix, then find the sum in the whole matrix across the limit that i need to define and I need to change the numbers in the limit with the sum
This is my function
function [a, b, c] = fun(A, limit_1, limit_2)
sum = 0;
b = 0;
c = 0;
r = size (A);
a = A;
r_1 = r(1); %%количество строк
r_2 = r(2); %%количество толбцов
for i = limit_1:(limit_2)
sum = sum + a(i);
end
for i = 1:limit_1-1
a(i) = sum;
end
for i = (limit_2+1):r_1 * r_2
a(i) = sum;
end
end
This is the code
limit_1 = input ("Vvedite levyi limit = ");
limit_2 = input ("Vvedite pravyi limit = ");
A=ones(1,10);
B=ones(1,10);
for i = 1000:1000:10000
x = randi([-5,5],i,i);
tic
a = fun(A, limit_1, limit_2);
vrema=toc;
A(1,i/1000)=vrema;
codegen fun -args {zeros(i,i),1} -nargout 3
tic
a = fun_mex(A, limit_1, limit_2);
vremb=toc;
B(1,i/1000)=vremb;
end
iks=1000:1000:10000;
plot(iks,A,'-square','MarkerIndices',1:length(A))
hold on
plot(iks,B,'-square','MarkerIndices',1:length(B))
legend('matlab-func','mex-func','Location','northwest')
xlabel('Size matrix')
ylabel('Time')
0 Kommentare
Akzeptierte Antwort
Athul Prakash
am 3 Apr. 2020
codegen fun -args {zeros(i,i),1} -nargout 3
I think you have forgotten to pass the third argument into the function. This leaves 'limit_2' undefined and MATLAB throws this error.
1 Kommentar
Weitere Antworten (0)
Siehe auch
Kategorien
Mehr zu Argument Definitions finden Sie in Help Center und File Exchange
Produkte
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!