Re: How to extract numbers from list elements with text?

*To*: mathgroup at smc.vnet.net*Subject*: [mg70371] Re: How to extract numbers from list elements with text?*From*: Bill Rowe <readnewsciv at sbcglobal.net>*Date*: Sat, 14 Oct 2006 03:07:55 -0400 (EDT)

On 10/13/06 at 1:30 AM, henning.heibergandersen at gmail.com (Henning Heiberg-Andersen) wrote: >I have a list looking like this: >{ 1 Intensity 0.23523, 2 Intensity 0.00005, 3 Intensity 0.00004, >..} >Is there a command which allows extraction of only the last number >appearing in each element of the list?. If not, how can I modify the >list elements? Mathematica would interpret 1 Intensity 0.23523 as the product of the integer 1, symbol Intensity and machine precision number 0.23523, returning In[1]:= 1 Intensity 0.23523 Out[1]= 0.23523 Intensity So, I assume your list is really { "1 Intensity 0.23523", "2 Intensity 0.00005", "3 Intensity 0.00004", ..} and I will further assume you want the last portion of the string returned as a numeric quantity in Mathematica. If I have what you want correct, then you can achieve what you want as follows: In[2]:= list={"1 Intensity 0.23523","2 Intensity 0.00005","3 Intensity 0.00004"}; In[3]:= ToExpression[Last@StringSplit@#]&/@list Out[3]= {0.23523,0.00005,0.00004} checking In[4]:= NumericQ/@% Out[4]= {True,True,True} -- To reply via email subtract one hundred and four