how to get random pair ?

Hello beautiful people,

Can anyone tell me that how I get random pair out of the following pairs?

I have these six pairs (1,5) (2,5) (3,3) (2,4) (2,5) (4,2)

these pairs represents x, y values/dimensiuons so I need one random pair like (2,5)....

Answer 1

[the cyclist]

How are these pairs currently stored?

This seems equivalent to just choosing a random number from 1-6, so you could do

idx = randi(6)

and choose the corresponding pair.

[marie lasz]

I don't know how I should store them but in a result I want a pair which should be random.

[marie lasz]

was trying this way but I don't want the pair (1,1) or so,... because I only need to choose between these pairs ....

  key=10;
rng(key);
x=randi([1  5],1,1);
y=randi([1  5],1,1);

[the cyclist]

Ah, I see. You could do this:

M = [1,5;
     2,5;
     3,3;
     2,4;
     2,5;
     4,2;];

xy_random = M(randi(6),:)

xy_random = 1×2

2 5

[marie lasz]

Ok I tried and getting it but how can I get pair with a comma between two values like (2,5)?

[the cyclist]

Can you be specific about exactly how you want the output to be? Do you want a string? A numeric vector? Just something that displays to the screen in a certain way?

[marie lasz]

See i am defining an equation in which I have to insert x,y dimension and these pairs are actually dimensions which are not working without comma(,). So I need a pair which returns (2,5) or other random pair .

[the cyclist]

So, the frustration here for me is nothing you are saying is in terms of MATLAB syntax. So, again, do you need a string like

"(5,2)"

?

Or maybe a character array like

'(5,2)'

?

Can you please state in MATLAB syntax what your next step requires this pair of values to look like? It is very strange for MATLAB code to expect numeric values in something other than numeric format.

[Walter Roberson]

How are you inserting x,y dimension?

[marie lasz]

@the cyclist apologies as I am a beginner ,yes I need a string.

[marie lasz]

@Walter Roberson x y dimensions is related to different pairs which I wrote above in the question. I am inserting these dimensions like;

[the cyclist]

M = [1,5;
     2,5;
     3,3;
     2,4;
     2,5;
     4,2;];

xy_random = M(randi(6),:);

str_input = sprintf("(%d,%d)",xy_random)

str_input = "(2,5)"

[Walter Roberson]

a = b(idx(1), idx(2)) + c