Re: string plus string

Dear Dennis,

Thank you very much! Actually my data is exactly like this (also see the
attached files)

value name1 name2
20.0 aaa1
80.7 bbb1 bbb2
45.5 ccc1 ccc2
60.3 ddd1
100.6 eee1

I modify your script as below:

begin
x = asciiread("mydata.dat",-1,"string")
data = stringtofloat(str_get_field(x(1:),1," "))
nx = dimsizes(x)
ss = new(nx, "string", "No_FillValue")
do n=0,nx-1
  nf = str_fields_count(x(n), " ")
  if (nf.eq.2) then
      aa1 = str_split(x(n)," ")
      ss(n) = aa1(1)
  else
      aa2 = str_split(x(n)," ")
      ss(n) = aa2(1)+" "+aa2(2)
  end if
end do
print(ss)
print(data)
end

My confusion is as:

(1) I want to skip the first row but "ss"always keep "name1" as its values
(2) dimsizes(x)=dimsizes(data)+1, so "x" didn't skip the first row. why is this?
(3) It seems the first value (20.0) was given to "name1" instead of "aaa1",
which actually is wrong, since I would like the "ss(0)=aaa1" to correspond to
"data(0)=20"

I may confuse you here, since I was totally confused.
Thanks again for further suggestion.

Mark

----- Original Message ----
From: Dennis Shea <shea@ucar.edu>
To: Mark Chan <cym263@yahoo.com>
Cc: ncl-talk@ucar.edu
Sent: Sat, March 19, 2011 10:29:03 AM
Subject: Re: string plus string

x = asciiread("....", -1, "string")

nx = dimsizes(x)
do n=0,nx-1
   nf = str_fields_count(x(n), " ")
   if (nf.eq.1) then
       ss = str_split(x(n)," ")
   else
       aa = str_split(x(n)," ")
       ss = aa(0)+" "+aa(1)
   end if
    print(""+ss)
end do

or

ss = new(nx, "string", "No_FillValue")
do n=0,nx-1
   nf = str_fields_count(x(n), " ")
   if (nf.eq.1) then
       ss(n) = str_split(x(n)," ")
   else
       aa = str_split(x(n)," ")
       ss(n) = aa(0)+" "+aa(1)
   end if
end do

print(""+ss)

On 3/18/11 4:59 PM, Mark Chan wrote:
> NCL users,
>
>
> If "x" is a string array like this:
>
> aaa1 aaa2
> bbb1
> ccc1 ccc2
> ddd1
> eee1
>
> I want to make a NCL script as:
>
> s1 = str_get_field(x(1:),1," ")
> s2 = str_get_field(x(1:),2," ")
> if (s2.ne."null") then ;------------------how to judge "s2" here
> ss =s1+" "+s2
> else
> ss=s1
> end if
>
> The aim is plus "s1" and "s2" with a space between only if "s2" has value.
> Otherwise the string "ss" would have extra space (e.g. ss=s1+" "), which
>damage
> the variable name.
> Can any one help!
>
> Thanks very much.
>
> Mark
>
>
>
>
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