Thursday, July 28, 2011

Little Old Man (1) (小老人 1)

( Mathematical software used: UDAV )

Related posts:

Sunday, July 24, 2011

Skull X4 (四顆骷髏頭)

( Mathematical software used: gnuplot )

Wednesday, July 20, 2011

( Mathematical software used: gnuplot )

Monster Cow (怪牛)

( Mathematical software used: gnuplot )

Tuesday, July 19, 2011

UDAV example: plotting implicit curves (level curves)

In this example, we will plot the implicit curve (level curve, contour line) defined by
the equation fun(x,y) = 0.

fun(x,y) =

MGL script:

setsize 400 400
plotfactor 1
xrange -2 2
yrange -2 2
new fun 512 512
list v 0
fill fun '(x*x+y*y-3)*sqrt(x*x+y*y) + 0.75 + 0.5*sin(4*sqrt(x*x+y*y))*cos(5*atan(y/abs(x))) - sin(5*atan(y/abs(x)))'
cont v fun 'r'

The following image shows the result:

Gnuplot example: plotting implicit curves (level curves)

In this example, we will plot the implicit curve (level curve, contour line) defined by
the equation fun(x,y) = 0.

fun(x,y) =

gnuplot script:

fun(x,y) = (x*x+y*y-3)*sqrt(x*x+y*y) + 0.75 \
+ sin(8*sqrt(x*x+y*y))*cos(6*atan(y/abs(x))) - 0.75*sin(5*atan(y/abs(x)))
set xrange [-2:2]
set yrange [-2:2]
set size ratio -1
set samples 512
set isosamples 512
set contour base
set cntrparam levels discrete 0
unset key
unset xtics
unset ytics
unset border
unset surface
set table 'curve.dat'
splot fun(x,y)
unset table
plot 'curve.dat' w l lw 1.5 lc rgb "red"

The result plot:

Related posts:

Monday, July 18, 2011

Cowboy (牛仔)

( Mathematical software used: gnuplot )

Two-Seat Aircraft (雙人座小飛機)

( Mathematical software used: Graph )

Airplane (飛機)

( Mathematical software used: Graph )

Saturday, July 16, 2011

Rookie Soldier (菜鳥天兵)

( Mathematical software used: Graph )

Monday, July 11, 2011

Pink Sissy (粉紅花蝶變態男)

This guy wants to be a woman!

( Mathematical software used: Graph )

Sunday, July 3, 2011

Super King (國王超人)

The original graph of fun(x,y) > 0.

( Mathematical Softwares used: gnuplot, Graph )

Flying Mallet (飛天神槌)

( Mathematical software used: Graph )

Saturday, July 2, 2011

Funny Equations - animations of curves

( Softwares used: MathGL - UDAV, Ulead GIF Animator )

Friday, July 1, 2011

Demon Sheriff (惡魔警長)

( Mathematical software used: Graph )