04-23-2016, 10:11 PM

Hello. Sketch plot is a very interesting function for best fit given some points. I wanted to know how accurate is my finger calculating R^2 stats after sketching. I made a very simple example given these points:

0,0

1,1

2,2

3,3

4,4

After drawing the points I sketch with my finger a sort of line, for example: Y=0,6*X+1

When I go to stats sheet, the first colum represents the linear fit (itÂ´s done automaticaly by HP Y=X), and the second column is the equation I obtained by sketching the line with my finger. It gets unexpected values.

Moreover the more I press STAT softmenu, the more the values changes:

Have I discovered a bug?

0,0

1,1

2,2

3,3

4,4

After drawing the points I sketch with my finger a sort of line, for example: Y=0,6*X+1

When I go to stats sheet, the first colum represents the linear fit (itÂ´s done automaticaly by HP Y=X), and the second column is the equation I obtained by sketching the line with my finger. It gets unexpected values.

Moreover the more I press STAT softmenu, the more the values changes:

Have I discovered a bug?