Name 
Type 
g/s 
Description 
brgb 
int 

Three chars represent the red, green and blue values of the background color to render 
clearit 
int 

If nonzero the cells of the matrix will be cleared to the brgb color before rendering. 
frgb 
int 

Four chars represent the alpha, red, green and blue values of the color to render 
height 
int 

The height of the output matrix (default=240) 
mode 
int 

Five different modes are possible: mode 0 renders points, mode 1 renders lines, mode 2 renders area between the float value and the horizontal axis at 0.0, and mode 3 renders the area in a bipolar way (reflected in the horizontal axis). Unlike the other modes, which all expect onedimensional matrices, mode 4 expects a two dimensional matrix, with one row of upper and one row of lower values, which it then renders as vertical bars, coloring the space between the lower and upper values. 
rangehi 
float 

The floating point value to map to the top of the graph (default=1.0) 
rangelo 
float 

The floating point value to map to the bottom of the graph (default=1.0) 