Draw a function!

[jte]

(05-14-2015 10:46 AM)CR Haeger Wrote:  …For next update consider letting user populate XY graph with "dots" by finger…

(05-14-2015 07:55 PM)salvomic Wrote:  …As other user said in another post, it would be nice also could "tap" some point with finger then have an interpolation of the curve…

(05-19-2015 11:00 PM)Alberto Candel Wrote:  …Touching in \(n+1\) points on the screen, \((x_0,,y_0), \ldots, (x_n,y_n)\), the HP Prime displays the graph of the polynomial \(p\) of degree \(\le n\) such that \(p(x_k)=y_k\) for all \(0\le k\le n\). Can it be done?

Since the recognition doesn't occur until all fingers are "up", one can draw little curve snippets that are spatially separated if two fingers are used. The 7820 firmware does require a minimum amount of sketching to be done for recognition to be attempted (a certain # of pixels to be brushed, not a minimum size bounding box on brushed pixels).