Matrix having one row

Hello,

I have the following problem: I would like to create a vecor of vectors containing pairs of numbers and then iterate through it. If I have a vector containing more than one pair, everything is OK:

x = [[-2, -1.5]; [-0.5, 0.5]; [2, 2.5]];

for i = 1:length(x)

%operations with x(i)

end

Unfortunately, if the input is a vactor containing only one pair, the program crashes:

x = [[-2, -1.5]];

for i = 1:length(x)

%operations with x(i)

end

I understand, why the program crashes, but I do not know, how to solve it. With other words: How can I design a general program, which works for both possibility without necessity of changing the loop?

Thank you for your help!

Rostislav

Answer 1

[Bruno Luong]

Avoid using LENGTH

Replace with

for i = 1:size(x,1)
    ...
end

[Rostislav Stanek]

Hello Bruno,

this works :-). Thank you very much!

Best regards,

Rostislav

Answer 2

[BOB MATHEW SYJI]

Consider replacing length(x) with numel(x)

[Rostislav Stanek]

Length and numel yield the same.

>> x = [[-2, -1.5]];

>> numel(x)

ans =

2

>> length(x)

ans =

2

I would like to get 1 in order to have a vector of length 2 in x(1) (or x(i) in general).