How to generate a random integer with specific range(for example, from 1 to 1000)?
Also, how to convert a floating point number into a integer? (2 Replies)
I want to be able to generate a random number within a korn shell script..
Preferably i would like to be able to state how many digits should be in this random number... ie 4 digits or 5 digits etc
Any ideas? (2 Replies)
I saw this formula to generate random number between two specified values in shell script.the following.
$(((RANDOM%(max-min+divisibleBy))/divisibleBy*divisibleBy+min))
Give a example in book.
Generate random number between 6 and 30.like this.
$(((RANDOM%30/3+1)*3))
But I have a... (1 Reply)
Dear all,
I have a question. I have a txt file say 4000 rows X 1800 Column. I 'd like to creat a new column as the first column which is a column of random numbers (n=4000)
thanks a lot!
Lin (2 Replies)
Hi,
Do anybody knows how to use awk or any command to random print out 1000 number which start from range 1 to 150000?
I know that "rand" in awk can do similar random selection.
But I have no idea how to write a code that can random pick 1000 number from range 1 to 150000 :confused:
... (1 Reply)
Hi there I am trying to generate a random number between 40 and 70 using the shell here is my code so far and it keeps going above 70. all help much appreciated!
comp=$(( RANDOM%70+40 ))
echo $comp (4 Replies)
Hi,
Is anybody experience generate a pair of random number by using awk command?
I wanna to generate a pair of random number (range from 1 to 4124) and repeats it 416 times.
Desired output
2 326
123 1256
341 14
3245 645
.
.
.
I did write the below command:
awk... (5 Replies)
Hi all...
Apologies for any typos, etc...
This took a while but it didn't beat me...
Although there are many methods of generating random numbers in a POSIX shell this uses integer maths and a simple C source to create an executable to get epoch to microseconds accuracy if it is needed. I take... (8 Replies)
Discussion started by: wisecracker
8 Replies
LEARN ABOUT PLAN9
add
ADD(2) System Calls Manual ADD(2)NAME
add, sub, mul, div, raddp, rsubp, rmul, rdiv, rshift, inset, rcanon, eqpt, eqrect, ptinrect, rectinrect, rectXrect, rectclip, Dx, Dy, Pt,
Rect, Rpt - arithmetic on points and rectangles
SYNOPSIS
#include <u.h>
#include <libc.h>
#include <libg.h>
Point add(Point p, Point q)
Point sub(Point p, Point q)
Point mul(Point p, int a)
Point div(Point p, int a)
Rectangle raddp(Rectangle r, Point p)
Rectangle rsubp(Rectangle r, Point p)
Rectangle rmul(Rectangle r, int a)
Rectangle rdiv(Rectangle r, int a)
Rectangle rshift(Rectangle r, int a)
Rectangle inset(Rectangle r, int n)
Rectangle rcanon(Rectangle r)
int eqpt(Point p, Point q)
int eqrect(Rectangle r, Rectangle s)
int ptinrect(Point p, Rectangle r)
int rectinrect(Rectangle r, Rectangle s)
int rectXrect(Rectangle r, Rectangle s)
int rectclip(Rectangle *rp, Rectangle b)
int Dx(Rectangle r)
int Dy(Rectangle r)
Point Pt(int x, int y)
Rectangle Rect(int x0, int y0, int x1, int y1)
Rectangle Rpt(Point p, Point q)
DESCRIPTION
The functions Pt, Rect and Rpt construct geometrical data types from their components. These are implemented as macros.
Add returns the Point sum of its arguments: Pt(p.x+q.x, p.y+q.y). Sub returns the Point difference of its arguments: Pt(p.x-q.x, p.y-q.y).
Mul returns the Point Pt(p.x*a, p.y*a). Div returns the Point Pt(p.x/a, p.y/a).
Raddp returns the Rectangle Rect(add(r.min, p), add(r.max, p)); rsubp returns the Rectangle Rpt(sub(r.min, p), sub(r.max, p)). Rmul
returns the Rectangle Rpt(mul(r.min,a), mul(r.max,a)); Rdiv returns the Rectangle Rpt(div(r.min,a), div(r.max,a)).
Rshift returns the rectangle r with all coordinates either left-shifted or right-shifted by a, depending on whether a is positive or nega-
tive, respectively.
Inset returns the Rectangle Rect(r.min.x+n, r.min.y+n, r.max.x-n, r.max.y-n).
Rcanon returns a rectangle with the same extent as r, canonicalized so that min.x <= max.x, and min.y <= max.y.
Eqpt compares its argument Points and returns 0 if unequal, 1 if equal. Eqrect does the same for its argument Rectangles.
Ptinrect returns 1 if p is a point within r, and 0 otherwise.
Rectinrect returns 1 if all the pixels in r are also in s, and 0 otherwise.
RectXrect returns 1 if r and s share any point, and 0 otherwise.
Rectclip clips in place the Rectangle pointed to by rp so that it is completely contained within b. The return value is 1 if any part of
*rp is within b. Otherwise, the return value is 0 and *rp is unchanged.
The functions Dx and Dy give the width (x) and height (y) of a Rectangle. They are implemented as macros.
SOURCE
/sys/src/libg
SEE ALSO graphics(2)ADD(2)