why do i get this error "Undefined function or variable 'vect2mat'."?

as we know that vect2mat is in built function. I'm confused and worried about this error. Please help me with this!!

function [c]=enc(m,n,mpk)
m1=double(m);
size=numel(m1);
c1=m1;
for i=1:size
    m2=m1(i)^mpk;
    c1(i)=mod(m2,n);
end
count=6-rem(size,6);
if rem(size,6)==0
     c2=vect2mat(c1,6);
else
    count1=zeros(1,count);
    c11=[c1,count1];
    c2=vect2mat(c11,6);
end
n1=[mpk,n,0,0,0,0];
c=[n1;c2];

Answer 1

[KL]

you mean vec2mat?

Note that you'd need communication systems toolbox for that.

But otherwise you could use reshape!

https://www.mathworks.com/help/matlab/ref/reshape.html

Another thing, do not override the inbuilt functions! in your code, you're creating a variable called size, I'd suggest you to rename it.

[sai kumar]

thank you so much for your immediate reply and i will follow your suggestion. But the reshape function aligns the vector elements in a column .I need function to align elements in row wise and go for another row. Is there any other way other than 'vect2mat'? I am new to MATLAB please help me. thank you.

[KL]

You just need to transpose the output of reshape!

>> a = [1 2 3 4 5 6];
>> b = reshape(a,3,2)

b =

       1     4
       2     5
       3     6

Now, let's try to transpose,

>> c = reshape(a,3,2).'

c =

       1     2     3
       4     5     6

[sai kumar]

thank you so much KL

[KL]

You're welcome, accepting the answer would be a way to thank though!