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How can I write the code of this line ?

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Zeinab Ahmadi93
Zeinab Ahmadi93 2017-7-26
评论： Walter Roberson 2017-7-26
Hello
E_PI=sqrt((xm-x_I)^2+(ym-y_I)^2);
E_PZ=sqrt((xm-xr)^2+(ym-yr)^2);
E_BZ= sqrt((x1(index1)-xr)^2+(y1(index1)-yr)^2);
r_1=E_BZ+E_PI;
r_2=E_BZ-E_PZ;
Assume that I have r1 and r2 and n=100, How can I write the following line which runs.Thanks in advance:)
  2 个评论
Walter Roberson
Walter Roberson 2017-7-26
For the above purpose, how is rand(k,1) defined?
Walter Roberson
Walter Roberson 2017-7-26
The code looks like it is intended to generate n random values in the range r1 to r2. If so then
R = (r1 - r1) * rand(n, 1) + r1;

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回答（1 个）

Kambren Rowlan
Kambren Rowlan 2017-7-26
Maybe?
% code
n = 100;
for j = 1:n
R(j) = r2 - r1)*(randi([1 j],1,1) + r1);
end
  2 个评论
Zeinab Ahmadi93
Zeinab Ahmadi93 2017-7-26
Thanks for your reply (randi([1 j],1,1) or (randi([1 j],1)?
Walter Roberson
Walter Roberson 2017-7-26
I do not understand why randi is being used here?

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