Input-defined color and point size

## in rgb color code

## r (red)   = FF0000 = 255*256*256 = 255* 65536

## g (green) = 00FF00 = 255*256

## b (blue)  = 0000FF = 255

##  cos.dat contains

##  #  x                y                pointsize  r (0<=r<=1)    g (0<=g<=1)     b (0<=b<=1)

##  0.0000000       1.0000000       0.0000000       0.0000000       0.0000000       1.0000000   

##  5.00000007E-02  0.99875027      4.99167070E-02  1.66666675E-02  4.99791689E-02  0.99875027   

##  0.10000000      0.99500418      9.93346721E-02  3.33333351E-02  9.98334214E-02  0.99500418   

##  0.15000001      0.98877108      0.14776011      5.00000007E-02  0.14943814      0.98877108   

##   ............

##   0 <= r,g,b < 1

rgb(r,g,b) = int(r*256)*65536 + int(g*256)*256 + int(b*256)

set term postscript eps color enhanced

set output 'inputdefined_pslc.eps'

set notitle

set nokey

# input difined point size

#plot 'cos.dat' u 1:2:($3*3) with p pt 7 ps var lc 7

# input difined point color

#plot 'cos.dat' u 1:2:(rgb($4,$5,$6)) with p pt 7 ps 1 lc rgb variable

# input difined point size and point color

plot 'cos.dat' u 1:2:($3*3):(rgb($4,$5,$6)) with p pt 7 ps var lc rgb variable