(50g) Quick Function Plotting Interface

[Eddie W. Shore]

This program will allow you to plot one function using a simplified form instead of the 50g interface.

Code:

<< ‘X’ PURGE
“Quick Function Plot”  
{ { “y(x)=” “Enter y(x)” }
{ “xmin=” “x minimum” }
{ “xmax=” “x maximum” }
{ “ymin=” “y minimum” }
{ “ymax=” “y maximum” } }
{ 2 2 } { } { } INFORM 
IF 0 == THEN KILL END
EVAL YRNG XRNG STEQ ‘X’ INDEP FUNCTION (0,0) AXES
ERASE DRAX DRAW PICT {#0d #0d} “Y=” EQ →STR + 1 
→GROB GOR PICTURE >>

You can use RPN to build expressions. However, everything for the window variables must evaluate to numbers. For example, if you want to set xmax to 2π, use 2 π * →NUM [ENTER]