Hi,
I'm not very experienced with R and struggle with data selection from a long
matrix with two columns.
I want to cut out the data between x > 0 and min(y).
> x <- c(-10, -5, 0, 5, 10, 15, 20)
> y <- c(10, 10, 10, -5, -6, -7, 10)
> data <- as.matrix( cbind(x, y) )
> data
x y
[1,] -10 10
[2,] -5 10
[3,] 0 10 _
[4,] 5 -5 |-- data interval
[5,] 10 -6 _| to be selected
[6,] 15 -7
[7,] 20 10
I need that to select the interval between a time 0 and a peak that is the
minimum here to fit that interval via nls() later.
Can anybody help? I would be very thankful for general hints how to select
data with the help of conditions.
Cheers
Martin
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