random no.

hi, can i get random no. in specific range ?

between 19 , -19

thanks

Yes, you can.

Answer 1

You didn't read the help on rand(), did you? If you had, you would have seen the answer to your question as the very first example:

Example 1
Generate values from the uniform distribution on the interval [a, b]:
 r = a + (b-a).*rand(100,1);

Needless to say, a=-19 and b = 19 in your case, and 100 is the number of random numbers to be generated, or:

r = -19 + 38 .* rand(100, 1);

While the solution in easy, not to say trivial, the suggestion to read the documentation is an will be valuable. +1

Answer 2

Depending on whether you want to draw from a discrete or a continuous distribution, you will likely want to use either the randi() or unifrnd() function.

Answer 3

naively, this works: 38*(rand-0.5)

Answer 4

As Sean Lawson said in the above comment, using -19+38*rand will generate a random real number in the range (-19 19)

to generate random integers use

randi ([lower_limit upper_limit],a,b,c...)

which generates an axbxcx..... random integer array in the range (lower_limit upper_limit)