![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/206961/image.png)
Why do we set r=r+1 when (x(t)-rangeX(r))*(x(t)-rangeX(r+1))>0 in the uniform variables code
1 vue (au cours des 30 derniers jours)
Afficher commentaires plus anciens
a=3;
b=7;
T=10^6;
BinW=0.01;
x=zeros(1,T);
rangeX=3:BinW:7;
Count=zeros(1,length(rangeX)-1);
for t=1:T
u=rand(1);
x(t)=a+(b-a)*u
r=1;
while (x(t)-rangeX(r))*(x(t)-rangeX(r+1))>0
r=r+1;
end
Count(r)=Count(r)+1;
end
bar(rangeX(1:length(rangeX)-1),Count);
axis([2.5 7.5 0 3000]);
I get this code from the class,and this code is about the uniform variables,in this code,i have some lines that i don't understand ,i hope someone can explain them to me.
1.
Count=zeros(1,length(rangeX)-1);
why do we create the 1 by length(rangeX)-1 zero matrix first,but not 1 by length(rangeX) zero matrix ?
2.
while (x(t)-rangeX(r))*(x(t)-rangeX(r+1))>0
r=r+1;
end
I don't understand the meaning of these three lines code,why do we set r=r+1 when (x(t)-rangeX(r))*(x(t)-rangeX(r+1))>0
0 commentaires
Réponse acceptée
darova
le 5 Mar 2019
while (x(t)-rangeX(r))*(x(t)-rangeX(r+1))>0
is the cheking if x(t) is not in ![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/206961/image.png)
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/206961/image.png)
its the same as:
while ~( rangeX(r) < x(t) && x(t) < rangeX(r+1) )
2 commentaires
darova
le 6 Mar 2019
You shoudn't, just showed you an example.
if x(t) is not between that range we r = r+1 (we examine another range). And when x(t) is IN the range we quit from while loop.
![Untitled.png](https://www.mathworks.com/matlabcentral/answers/uploaded_files/207059/Untitled.png)
In another words: we searching range for x(t)
Plus de réponses (0)
Voir également
Catégories
En savoir plus sur Graphics Object Programming dans Help Center et File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!