how create correct function

Hi I wrote something like that and I think it is a function but I got some errors when I run it. What is mistake?

 function t = Aineq(k1,q,e,a,b)
m=input('input m=')
n=input('input n=')
q=sparse(m*n,m*n)
e=speye(m*n)
k1=-4*e
a=constraint12b(m,n)
b=constraint12c(m,n)
t=[k1 q e q;q k1 q e;a q e q;q a q e;b q -e q;q b q -e]
end

I point that constraint12b and constraint12c are functions separately and could be ran correctly.

[Guillaume]

Rather than leaving it for us to guess, what errors do you get? Please paste the entire error message including the part that shows the line where the error occurs.

[fatema saba]

yes, It is my error.

>> t = Aineq(k1,q,e,a,b)

??? Undefined function or variable 'm'.

Error in ==> aineq at 2 q=sparse(m*n,m*n)

the script that I write is a function or not? Thanks

[Guillaume]

The code that you posted in your question does not match the error message that you've just posted. Line 2 in your question is:

m=input('input m=')

whereas according to the error, it is:

q=sparse(m*n,m*n)

Obviously, if you remove the line that creates m, then it's not going to be defined.

In the future, please post the exact code you use, otherwise you're sending us on a wild goose chase.

Anyway, Azzi's answer should be what you're looking for.

[fatema saba]

Thank you for your attention but I send the image of my function to you again. I exactly received the error that I sent you before

my error:

>> t = Aineq(k1,q,e,a,b) ??? Undefined function or variable 'm'.

Error in ==> aineq at 2

q=sparse(m*n,m*n)

Answer 1

[Azzi Abdelmalek]

Your function should be something like this

function t = Aineq(m,n)
q=sparse(m*n,m*n)
e=speye(m*n)
k1=-4*e
a=constraint12b(m,n)
b=constraint12c(m,n)
t=[k1 q e q;q k1 q e;a q e q;q a q e;b q -e q;q b q -e]

save this as Aineq.m, then if you want to run your function, you have to use another script or from Matlab windows command

n=10
m=20
t = Aineq(m,n)

[fatema saba]

Thank you