How to generate a random integer betwwen a and b inclusive.

Good morning, I would like to know How to generate a random integer betwwen 1 and 10 inclusive. the integer should be 1 or .... or 10

Thanks (I ve already done it before, but I lost the code).

Answer 1

[Steven Lord]

Use randi.

[Image Analyst]

randomInteger = randi(10); % Random # between 1 and 10

[Roger Stafford]

Ah yes! I failed to notice the all-important word 'integer'.

[Joel Sande]

You are close, but not necessarelly 1 to 10, what about 15 to 20 ?

[Steven Lord]

Easy enough:

randi([15 20], 1, 10) % Generate a 1-by-10 vector whose elements are in 15:20

Note that randi draws with replacement. If later you want to draw multiple numbers without replacement, see randperm (and shift the values if you want to draw from 15:20 rather than 1:N for some N.)

[Joel Sande]

Thanks, Now I have this :

Connect = {'A','I','O'}; r = randi(3); strength = randi(10); conn = Connect(r);

dir_file = '\..my path..\'; % you should change this to your path

fid = fopen(dir_file, 'a'); fprintf(fid,'%s %s %s\n', num2str(Neighboor), conn, num2str(strength));

% fprintf doesn t work here because of conn referring to a cell

What to can I do ??

[Joel Sande]

Function is not defined for 'cell' inputs.

[Joel Sande]

%If I write this, it works:

conn = Connect(r);

fprintf(fid,'\n%s %s\n', num2str(Neighboor), num2str(strength));

Answer 2

[Roger Stafford]

   x = 9*rand(n,1)+1;

As to "inclusive" this will never give exactly 1 or exactly 10. However if you intended to have an uniform distribution between 1 and 10 the theoretical probability of either extreme is appropriately zero.

Addendum: Ignore this solution. I didn't notice the word 'integer'.

[Joel Sande]

what is n ? randi for integer right ? I don't want a vector, I want only 1 number