Description Usage Arguments Details Value Examples
Get theta from given spiral lengths
1 | solve_theta_from_spiral_length(len, interval = NULL, offset = 0)
|
len |
A vector of spiral lengths. |
interval |
Interval to search for the solution. |
offset |
Offset of the spiral. In the general form: |
The length of the spiral has a complicated form, see https://downloads.imagej.net/fiji/snapshots/arc_length.pdf .
Let's say the form is l = f(theta)
, solve_theta_from_spiral_length
tries to find theta by a known l
.
It uses uniroot
to search solutions.
The theta value.
1 2 3 4 5 | spiral_initialize()
s = current_spiral()
theta = pi*seq(2, 3, length = 10)
len = s$spiral_length(theta)
solve_theta_from_spiral_length(len) # should be very similar as theta
|
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