How many times does each combination of numbers appear?
1 view (last 30 days)
Show older comments
Let's say I ran randi(1-40) to produce 5 columns and 100 rows Would I be able to get it to tell me how many times, 1 and 2, for example, come up in the same row. Then if not how may times another combination would come up like 3 and 4 for example? Thanks everyone for any help
2 Comments
Guillaume
on 21 Oct 2019
randi is just a function to generate random numbers. The only thing you get out of it is the random numbers. But yes, you can easily write code to get the histogram of the random numbers generated.
Accepted Answer
per isakson
on 21 Oct 2019
Edited: per isakson
on 21 Oct 2019
"get it to tell" depends on what the little word "it" refers to. The function randi() cannot tell that.
Try this as a start
%%
M = randi([1,5],100,5);
has_12 = arrayfun( @(jj) all( ismember( [1,2], M(jj,:) ) ), (1:size(M,1)) );
has_34 = arrayfun( @(jj) all( ismember( [3,4], M(jj,:) ) ), (1:size(M,1)) );
has = has_12 & has_34;
>> sum(has)
ans =
10
>>
In this case, ten out of one hundred rows has 1,2,3 and 4,
0 Comments
More Answers (0)
See Also
Categories
Find more on Creating and Concatenating Matrices in Help Center and File Exchange
Products
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!