how can I compute distances:

how can I compute distances:

I have a code which was running in matlab 2016:

Nat=1000;  
pos=(rand(3, Nat)-0.5);
kr=dist(pos)+eye(Nat);

In my new matlab version (Matlab 2019), it seems to require an additional toolbox?

yours

Robin

Answer 1

[Robin Kaiser]

Thank you for your fast feedback. I tried and get the following reply:

'pdist' requires Statistics and Machine Learning Toolbox.

yours

Robin

[Walter Roberson]

kr = squeeze(sum((pos - permute(pos, [1 3 2])).^2,1)) + eye(NAT);

Answer 2

[Fangjun Jiang]

Run the code and then run "license inuse". Only MATLAB is needed.

[Robin Kaiser]

after "license inuse" I get

"matlab" as answer, but dist(pos) still does not work. Is this a backward incompatibilty?

[Walter Roberson]

It is not a backward incompatibility. dist() was never part of basic MATLAB. You probably had some third-party dist() function.

Answer 3

[Walter Roberson]

dist() is part of the Deep Learning Toolbox

[Robin Kaiser]

I see that

'dist' requires one of the following:

Deep Learning Toolbox

Navigation Toolbox

Robotics System Toolbox

Sensor Fusion and Tracking Toolbox

But I did not have those in my previous matlab version. So this seems to be a backward incompatibility?

[Walter Roberson]

No, it implies you used a third-party function before.

If you want to use basic MATLAB, then

kr = squareform(pdist(pos.')) + eye(Nat);

Answer 4

[Robin Kaiser]

Thank you: this works

yours

Robin