random number

[ovince]

Hi,

Is it posible to generate (for example 1000) random numbers in a such a way to fill a square in plane in awk?

thanks
oliver

 

[PHV]

In your awk man pages have a look at the rand() function.

Hope This Helps, PH.
Want to get great answers to your Tek-Tips questions? Have a look at FAQ219-2884 or FAQ181-2886

 

[feherke]

Hi

Is easy to generate 1000 random numbers...

awk 'BEGIN{for(i=0;i<1000;i++)print rand()}'

... but I do not understand the "fill a square in plane" part.

Maybe for the plane you want pairs of random numbers, both in a given value interval.

So if you want random point coordiantes inside a square like this :
[tt] |
y|...+-------+
| | |
| | |
| | |
|...+-------+
| : :
--+-------------
0| x<--d-->[/tt]

awk -vx=[green][i]x[/i][/green] -vy=[green][i]y[/i][/green] -vd=[green][i]d[/i][/green] 'BEGIN{for(i=0;i<1000;i++)print int(rand()*d+x)","int(rand()*d+y)}'

I hope you do not want to rotate that square.

Feherke.

http://rootshell.be/~feherke/

 

[ovince]

I will rotate it in gnuplot ... just to generate it first

well I would like to have random pairs between

1.07<x<1.19 and 4.66<y<6.14

and I put (no int)

awk -vx=1.07 -vy=6.14 -vd=0.12 'BEGIN{for(i=0;i<10000;i++)print (rand()*d+x),(rand()*d+y)}' > ran.aw

but I do not get the square.

 

[ovince]

ie I have different scales on x and y so the square is not a square

 

[ovince]

and finally I have 100 filled squares that rotate in gnuplot


awk '{for(i=0;i<10000;i++)print rand()*$3+$1,rand()*$4+$2}' randIn.dat > ranOut.dat


koszonom Feherke (I hope I do not mistake with Koszonom )

 

[feherke]

Hi

(I hope I do not mistake with Koszonom )

Hopefully nobody will consider that saying thank you in hungarian or in any other language is breaking the Tek-Tips Posting Policies.

Feherke.

http://rootshell.be/~feherke/