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POconditional generation of random numbers using matlab
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copied!<p>I have a function that generates normal random number matrix having normal distribution using normrnd. </p> <pre><code> values(vvvv)= normrnd(0,0.2); </code></pre> <p>The output is from round1 is: ans =</p> <pre><code>0.0210 0.1445 0.5171 -0.1334 0.0375 -0.0165 Inf -0.3866 -0.0878 -0.3589 </code></pre> <p>The output from round 2 is: ans =</p> <pre><code>0.0667 0.0783 0.0903 -0.0261 0.0367 -0.0952 0.1724 -0.2723 Inf Inf </code></pre> <p>The output from round 3 is: ans =</p> <pre><code>0.4047 -0.4517 0.4459 0.0675 0.2000 -0.3328 -0.1180 -0.0556 0.0845 Inf </code></pre> <p>the function will be repeated 20 times.</p> <p>It is obvious that the function is completely random. What I seek is to add a condition.</p> <p>What I need is: if any entry has a value between 0.2 and 0.3. that value will be fixed in the next rounds. Only the remaining entries will be subjected to change using the function rand.</p> <p>I have found the rng(sd) which seeds the random number generator using the nonnegative integer sd so that rand, randi, and randn produce a predictable sequence of numbers.</p> <p><a href="https://stackoverflow.com/questions/4682080/how-to-set-custom-seed-for-pseudo-random-number-generator">How to set custom seed for pseudo-random number generator</a></p> <p>but how to make several entries of the matrix only effected!!</p> <p>Another problem: seems that rng is not available for matlab r2009 How to get something similar without entering in the complication of probability & statistics</p>

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