# Some basic MATLAB questions

3 views (last 30 days)
JACK on 14 Jun 2022
Commented: Rena Berman on 19 Jul 2022
Given a vector u of dimension 20x1 consisting of random variables from a uniform-
distribution (distributed on [0,1]).
Instructions:
- Create a code in MATLAB,
- that creates the vector u,
- which contains both 'for loops' and 'if loops',
- and specifies for all values in the vector u in which quarter the number lies.
I managed to create the vector and split it into the quarters. I dont get how to implant the for and if loops.
Can someone help me out ? :((
Rena Berman on 19 Jul 2022

KALYAN ACHARJYA on 14 Jun 2022
Hint: rand
https://in.mathworks.com/help/matlab/ref/rand.html
KALYAN ACHARJYA on 14 Jun 2022
@JACK Are you wish to write your own code for quantile function using for loop or if ..any whatever?

Torsten on 14 Jun 2022
n = 20;
r = zeros(n,1)
for i=1:n
r(i) = rand;
if r(i) < 0.25
quarter(i) = ...
elseif r(i) >=0.25 && r(i) < 0.5
...
elseif
...
else
...
end
end
Can you take it from here ?
Sam Chak on 14 Jun 2022
@JACK, You don't have to follow exactly. Basically, you create four quarter groups and if the r(i) number satisfies one out of the 4 conditional statements, then that number will be dumped into that group.

Walter Roberson on 14 Jun 2022
hint: floor(n*4)
But be careful with the exact boundaries that are multiples of 1/4. For each of those exact values you should write down which bin you want to result, and test your code to make sure it gives those results.
0, ¼, ½, ¾, 1 is five boundaries not 4, and you need to design with that in mind.

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