Returns a list of reaction coefficients

This function maps c("A","2 B") to c(1,2)

Usage

onlyCoefficients(formulaList)

Arguments

formulaList

a list of character vectors, derived from the left or right side of a reaction formula:

Value

a list of numeric coefficient vectors

Details

This is a C function because it is much easier to write in C. C has teh strtod() function which expects a leading number and stops when the numbers end. as.character() returns NA if the input contains any dirt.

The reaction formula is as tring like this: "A + 2 B <=> C", when split at <=> and then later at +, we get the strings that must be prsed: "A" and "2 B" for the left side and "C" for the right side. The numbers are the stoichiometric constants, or coefficients.

Examples

as.character("12 A")
#> [1] "12 A"
onlyCoefficients("12 A")
#> [[1]]
#> [1] 12
#>