Read exponential numbers from console - ProgrammingR

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February 5, 2012 at 4:26 pm #461
liquider
Member
Hi guys!
I’m trying to read some input numbers from console but I’m facing the following problem. When input value is something like 10^4 I cannot convert this input to a numeric value.
My code looks like:
number <- readline("Enter number: ") number <- as.numeric(number) The result is NA Does someone any idea what I could do to convert the input string in a numeric value? Thanks a lot!! Peter
February 7, 2012 at 4:28 pm #463
bryan
Participant
One way to do this is by using parse and eval:
number <- readline("Enter number: ") number <- eval(parse(text = number))
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