[R] Number of digits of a value for problem 7.31 RFAQ

Hello dear R users! I did not find a function which gives information about the number of digits of a value shown by R. Do you know one? I need it to solve the problem (see RFAQ 7.31)that 0.2==0.2+0.1-0.1 FALSE The solution suggested in RFAQ is to use isTRUE(all.equal(0.2,0.2+0.1-0.1)) But if

Re: [R] Number of digits of a value for problem 7.31 RFAQ SOLVED

[EMAIL PROTECTED] a e'crit : What I mean is if R shows 2.3456 I want to obtain the info that digits=4 even if in facts the value has more (internal) digits. Try: x = 1.23456789 format(x, nsmall=20) # [1] 1.2345678899989009 I've just re-read the question. I

Re: [R] Number of digits of a value for problem 7.31 RFAQ SOLVED not really

Matthieu Stigler a e'crit : [EMAIL PROTECTED] a e'crit : What I mean is if R shows 2.3456 I want to obtain the info that digits=4 even if in facts the value has more (internal) digits. Try: x = 1.23456789 format(x, nsmall=20) # [1] 1.2345678899989009 I've just re-read the question.

Re: [R] Number of digits of a value for problem 7.31 RFAQ SOLVED not really

Actually (after some trials) there is a little problem when faced with zeros... getndp(1.0) [1] 0 Are you sure this isn't what you want? 1.0 is just 1 in disguise, and round(1.0, 0) is the same as round(1.0, 1) anyway. Note that I thought on a very different way which was starting