Re: Is there a simple way to transform 1.1 to 11/10?

*To*: mathgroup at smc.vnet.net*Subject*: [mg92983] Re: [mg92968] Is there a simple way to transform 1.1 to 11/10?*From*: Bob Hanlon <hanlonr at cox.net>*Date*: Wed, 22 Oct 2008 05:37:01 -0400 (EDT)*Reply-to*: hanlonr at cox.net

myRationalize[x_, n_Integer] := Round[x*10^n]/10^n x = 1.000000001; myRationalize[x, 9] 1000000001/1000000000 Bob Hanlon ---- Alain Cochard <alain at geophysik.uni-muenchen.de> wrote: ============= The obvious In[1]:= x=1.1`Infinity is not syntactically correct. I understand that SetPrecision[1.1,Infinity] does not work either: In[3]:= SetPrecision[1.1,Infinity] 2476979795053773 Out[3]= ---------------- 2251799813685248 In[4]:= N[%,20] Out[4]= 1.1000000000000000888 I searched the newsgroup and thought I had the solution with Rationalize: In[5]:= Rationalize[1.1,0] 11 Out[5]= -- 10 But In[9]:= Rationalize[1.000000001,0] 999999918 Out[9]= --------- 999999917 In[10]:= N[%,20] Out[10]= 1.0000000010000000830 So any simple way? Thanks, Alain -- Bob Hanlon