Uses the approximation that coalescence times H_i are equal to a+b*U_i to find a and b. b is equal to 1/r, where r is the net growth rate.

## Arguments

- tree
An ultrametric tree subset to include only the clone of interest. Alternatively, a list with several such trees.

- alpha
Used for calculation of confidence intervals. 1-alpha confidence intervals used with default of alpha = 0.05 (95 percent confidence intervals)

## Value

A dataframe including the net growth rate estimate, confidence intervals, and other important details (clone age estimate, runtime, n, etc.)

## See also

internalLengths which uses an alternatvie method for growth rate estimation from an ultrametric tree.

## Examples

```
df <- maxLikelihood(cloneRate::exampleUltraTrees[[1]])
```