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From: Dr. S. S. Tong on 4 Apr 2010 07:47
On Sat, 3 Apr 2010 06:09:05 -0500 (EST), ebaugh wrote
> How could I go from:
> {h,e,l,l,o}
> to
> {hello}?
>
> That is the first step of what I am really looking to do. Which is
> to go from:
> {{t,h,i,s},{i,s},{a},{t,e,s,t},{m,e,s,s,a,g,e}}
> to
> "this is a test message"
>
> Thanks all,
> Jason Ebaugh

The following will do (assuming the elements in your lists are strings):

StringJoin[{"h", "e", "l", "l", "o"}]

StringJoin @@
Riffle[{{"t", "h", "i", "s"}, {"i", "s"}, {"a"}, {"t", "e", "s",
"t"}, {"m", "e", "s", "s", "a", "g", "e"}}, " "]

Shiu-sing

From: Tomas Garza on 4 Apr 2010 07:47
Make sure each letter in your {h,e,l,l,o} is a string, i.e., that it is actually

{"h", "e", "l", "l", "o"}

Then use StringJoin:

In[1]:== StringJoin[{"h", "e", "l", "l", "o"}]

Out[1]== "hello"

Do the same for {"This", " ", "is", " ", "a", " ", "test", " ", "message"}, but remember to type the spaces between each word.

In[2]:== StringJoin[{"This", " ", "is", " ", "a", " ", "test", " ",
"message"}]

Out[2]== "This is a test message"

Tomas


> Date: Sat, 3 Apr 2010 06:09:05 -0500
> From: ebaugh(a)illinois.edu
> Subject: Combining elements of a list
> To: mathgroup(a)smc.vnet.net
>
>
> How could I go from:

> to> {h,e,l,l,o}
> {hello}?
>
> That is the first step of what I am really looking to do. Which is
> to go from:
> {{t,h,i,s},{i,s},{a},{t,e,s,t},{m,e,s,s,a,g,e}}
> to
> "this is a test message"
>
> Thanks all,
> Jason Ebaugh
>
>
From: Christoph Lhotka on 5 Apr 2010 08:01
Hello,

I already saw many versions, which I like very much, just another one to
demonstrate Mathematica=C2=B4s string manipulation capabilities:

data=={{t,h,i,s},{i,s},{a},{t,e,s,t},{m,e,s,s,a,g,e}}

StringReplace[ToString[data],{" "|","|"{"->"","}"->" "}]//StringTrim

all the best, chr


On Sa, 3.04.2010, 13:09, ebaugh(a)illinois.edu wrote:
>
> How could I go from:
> {h,e,l,l,o}
> to
> {hello}?
>
> That is the first step of what I am really looking to do. Which is
> to go from:
> {{t,h,i,s},{i,s},{a},{t,e,s,t},{m,e,s,s,a,g,e}}
> to
> "this is a test message"
>
> Thanks all,
> Jason Ebaugh



On Sa, 3.04.2010, 13:09, ebaugh(a)illinois.edu wrote:
>
> How could I go from:
> {h,e,l,l,o}
> to
> {hello}?
>
> That is the first step of what I am really looking to do. Which is
> to go from:
> {{t,h,i,s},{i,s},{a},{t,e,s,t},{m,e,s,s,a,g,e}}
> to
> "this is a test message"
>
> Thanks all,
> Jason Ebaugh
>
>
>
>
>


--
Mag. Christoph Lhotka
University of Vienna / Institute for Astronomy
Tuerkenschanzstrasse 17, A-1180 Vienna, Austria
fon. +43 (1) 4277 51841
mail. lhotka(a)astro.univie.ac.at


From: Murray Eisenberg on 5 Apr 2010 08:01
Riffle: that's a function new in Mathematica 6 that I missed completely.
Neat!

On 4/4/2010 7:43 AM, Albert Retey wrote:
> Hi,
>
>> How could I go from:
>> {h,e,l,l,o}
>> to
>> {hello}?
>>
>> That is the first step of what I am really looking to do. Which is
>> to go from:
>> {{t,h,i,s},{i,s},{a},{t,e,s,t},{m,e,s,s,a,g,e}}
>> to
>> "this is a test message"
>>
> If you want to join strings, use StringJoin :-)
>
> this works if the entries are symbols:
>
> letters={{t, h, i, s}, {i, s}, {a}, {t, e, s, t}, {m, e, s, s, a,
> g, e}}
>
> StringJoin[Riffle[Map[ToString,letters,{2}], " "]]
>
> if the entries are strings already, this would be enough:
>
> letters = {{"t", "h", "i", "s"}, {"i", "s"}, {"a"}, {"t", "e", "s",
> "t"}, {"m", "e", "s", "s", "a", "g", "e"}}
>
> StringJoin[Riffle[letters, " "]]
>
> hth,
>
> albert
>

--
Murray Eisenberg murray(a)math.umass.edu
Mathematics & Statistics Dept.
Lederle Graduate Research Tower phone 413 549-1020 (H)
University of Massachusetts 413 545-2859 (W)
710 North Pleasant Street fax 413 545-1801
Amherst, MA 01003-9305

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