Appendix A: Functions and Instructions 599
Pxl-Off(row,column)Erases pixel at
(row,column); 0 row 62
and 0 column94.
y <
POINTS
5:Pxl-Off(
Pxl-On(row,column)Draws pixel at (row,column);
0row 62 and
0column 94.
y <
POINTS
4:Pxl-On(
pxl-Test(row,column)Returns 1 if pixel (row,
column) is on, 0 if it is off;
0row 62 and
0column 94.
y <
POINTS
7:pxl-Test(
P4Rx(r,q)Returns X, given polar
coordinates r and q or a list
of polar coordinates.
y ;
ANGLE
7:P4Rx(
P4Ry(r,q)Returns Y, given polar
coordinates r and q or a list
of polar coordinates.
y ;
ANGLE
8:P4Ry(
QuadReg [Xlistname,
Ylistname,freqlist,
regequ]
Fits a quadratic regression
model to Xlistname and
Ylistname with frequency
freqlist, and stores the
regression equation to
regequ.
…
CALC
5:QuadReg
F
unction or
Instruction/Arguments
Result Key or
Keys/Menu or
Screen/Item