How can call a vector element using index in the condition of if_else loop?

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Sharad Patel
Sharad Patel 2021-6-7
编辑： SALAH ALRABEEI 2021-6-7
Here in this code the R is a vector and using find I identified the indexes of specified number and save them to vectors m, n, o, p. Now by using the vector I want to fill the random numbers between 5 and 40 so I developed the following code. But I am not getting desired result.
R=P(:,6);
m =find(R==40);
n =find(R==25);
o =find(R==15);
p =find(R==8)
for k= 1:6160
if k==k.m
R(k,1)=randi([5 40],:,1);
elseif k==k.n
R(k,1)=randi([5 40],:,1);
elseif k==k.o
R(k,1)=randi([5 40],:,1);
elseif k==k.p
R(k,1)=randi([5 40],:,1);
end
end
R

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采纳的回答

SALAH ALRABEEI
SALAH ALRABEEI 2021-6-7
% Try this
R=P(:,6);
m =find(R==40);
n =find(R==25);
o =find(R==15);
p =find(R==8)
for k= 1:6160
if ismember(k,m)
R(k,1)=randi([5 40],1);
elseif ismember(k,n)
R(k,1)=randi([5 40],1);
elseif ismember(k,n)
R(k,1)=randi([5 40],1);
elseif ismember(k,n)
R(k,1)=randi([5 40],1);
end
end
R
  3 个评论
显示 1更早的评论
Walter Roberson
Walter Roberson 2021-6-7
So all of the R=40 should result in the same random number for all positions? And all of the 25 should result in the same random number as each other, but different from the R=40?

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更多回答（2 个）

SALAH ALRABEEI
SALAH ALRABEEI 2021-6-7
编辑：SALAH ALRABEEI 2021-6-7
% A faster way
R(m,1)=randi([5 40],length(m),1);
R(n,1)=randi([5 40],length(n),1);
R(o,1)=randi([5 40],length(o),1);
R(p,1)=randi([5 40],length(p),1);
Walter Roberson
Walter Roberson 2021-6-7
R=P(:,6);
m =find(R==40);
n =find(R==25);
o =find(R==15);
p =find(R==8)
k = [m;n;o;p];
nk = length(k);
R(k,1) = randi([5,40],nk,1);

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