draw polyline
epline(xData,yData[,lineWidth[,dash[,color]]])
xData :
vector of x-values of polyline
yData :
vector of y-values of polyline
lineWidth :
width of polyline
default: lineWidth=eLineWidth
dash :
if a scalar and
dash=0 solid lines,
dash>0 dash length
dash<0 fill polylines with color
default: dash=eLineDash
if a vector with size 1xn, then dash describes
a dash combination [space lineLength1 lineLength2 ...]
if a matrix and color=-1
dash is the image of polyline
and filled with RGB values
(value=R*2^16+G*2^8+B and R,G,B are integer of 0:255)
if a matrix and color is a colormap
dash is the image of polyline
and filled with indices of colormap
if a string then dash is filename of a JPEG-file
color :
if dash>=0 vector of frame color ([r g b])
if dash<0 vector of background color
if dash a matrix then colormap of image or -1
default: dash=eLineColor