Keys: press A, P, H or V to pick a handle. Press an arrow key to move it one slider step. Hold Shift with an arrow key to move it five steps. Press Esc to let go.
To move a handle without dragging, tap it and then tap the spot where it goes. The P box accepts 2pi.
Landmarks
Estimates
1ymaxround level near the top
2yminround level near the bottom
3First peak (or first trough)input
4Next peak (or next trough)input
5Upward crossinginput on the center line
Parameters from the estimates
R
Upward crossings
Replacing h with h + P, h − P or any other whole-period translation leaves the curve unchanged. The reported horizontal shift is the lowest nonnegative of these values.