HP 41C Matrix Sort X-memory

[mbrethen]

If I'm not mistaken, the graphing calculators (HP-28, HP-48, etc.) can handle X-Y scatter plots, but I don't know how they accomplish this. Has anyone tried this on a 41C using the plotting functions available? PRAXIS, REGPLOT and STKPLOT give the user control over how data points are plotted.

The purpose of a scatter plot is to visually show the relationship between two sets of data. Considering the data above, and given the limited resolution of, say the HP 82240B printer, it might suffice to round each point to the nearest integer. The smallest resolution then would be a unit step. Using a unit step on the rounded values yields ~47 data points. Points for which no data is given could be assigned a function, or y, value of zero. Alternately, the "MP" program on the PPC module has an overflow mode such that they "disappear" off the edge of the plot. The algorithm would determine the appropriate step size for the general case. Does this sound like a reasonable approach?