crash in fit_OSLLifeTimes()

[mcol]

fit_OSLLifeTimes(ExampleData.TR_OSL, signal_range = 1:2)
# Error in fit_OSLLifeTimes(ExampleData.TR_OSL, signal_range = 1:2) : 
#  object 'start_parameters' not found

[mcol]

The problem here is that the signal range contains only 2 points, and when we get here:

Luminescence/R/fit_OSLLifeTimes.R

Lines 432 to 433 in 759a114

	while(!is.na(suppressWarnings(qf(method_control_setting$p, df1 = 2, df2 = length(df[[2]]) - 2 * m - 2))) && (
	F[2] > qf(method_control_setting$p, df1 = 2, df2 = length(df[[2]]) - 2 * m - 2) & F[1] >= F[2])){

we don't even enter the while loop (as df2 = length(df[[2]]) - 2 * m - 2 is negative: 2 - 2 * 1 - 2 = -2), and start_parameters doesn't get initialised.

It seems that we need a test on a minimum number of signal points (which depends on the requested number of components m).

[mcol]

Actually we have a check, but that happens before we restrict the dataset to only the points in the signal range requested, so it should be enough to move that to the correct spot.

[mcol]

Fixed by #195.