## generate random negative numbers

### PK (view profile)

on 26 Jan 2013
Latest activity Commented on by Senait Senay

on 3 Jan 2014

### Matt J (view profile)

I thank if some one can help in this, how can i generate a matrix of some size for ex 100x100 with in the range of [-0.01,0] and that too with decimal values contained in it like -0.001,-0.0056 like that and also for the ranges like [-60,-30] with decimal values like -58.254,-56.985 and only 3 decimal values after the point.

Image Analyst

### Image Analyst (view profile)

on 26 Jan 2013

The answer to this is the example to rand() in the help.

PK

### PK (view profile)

on 28 Jan 2013

@ Image Analyst no rand did not work for negative numbers.

Image Analyst

### Image Analyst (view profile)

on 28 Jan 2013

Sorry but you are wrong. Look at Greg's code below, which is the same as the help example I referred you to. You can certainly have "a" and "b" be negative numbers. Why do you think you can't? No one said they had to be positive.

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### Matt J (view profile)

on 28 Jan 2013
` n=3; %number of decimal places`
` A = randi([-60,-30]*10^n,[100,100])/10^n;`

PK

on 28 Jan 2013

Senait Senay

on 3 Jan 2014

### Greg Heath (view profile)

on 26 Jan 2013

x = a + (b-a)*rand(m,n);

Hope this helps.

Thank you for formally accepting my answer.

Greg

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