[ncl-talk] Error with date format

[Rick Brownrigg]

HI,

You might try the string formatting functions sprintf/sprinti; perhaps
something like:

ncl 0> y = 2019
ncl 1> m = 8
ncl 2> d = 31
ncl 3> ymd = sprinti("%04d",y) + "-" + sprinti("%02d",m) + "-" +
sprinti("%02d",d)
ncl 4> print(ymd)

Variable: ymd
Type: string
Total Size: 8 bytes
            1 values
Number of Dimensions: 1
Dimensions and sizes:   [1]
Coordinates:
(0)     2019-08-31

Rick


On Sun, Sep 1, 2019 at 2:02 AM Lyndz via ncl-talk <ncl-talk at ucar.edu> wrote:

> Dear NCL-experts,
>
> *Details:*
> I am converting dates with YYYYMMDD format to YYYY-MM-DD format (separated
> by a hyphen). For example, I have the following data *20140423*. If the
> month and day are both less than 10, a 0 should precede it. However, I
> encountered an error below:
>
> -------------------------------------------------------------------------------------------------------------
> *What I have so far:*
> I have the following function from a previous email:
>
>      undef("add_hyphen")
>      function add_hyphen(yyyymmdd[*]:integer)
>      local yyyy, mmdd, mm, dd, a, b, c, d
>      begin
>       yyyy    = yyyymmdd/10000
>       mmdd    = yyyymmdd-(yyyy*10000)
>       mm      = mmdd/100
>
>          if(mm.lt.10)
>          a = tostring(mm)
>          b = 0+a
>          else
>          b = mm
>          end if
>
>          dd      = mmdd-(mm*100)
>          if(dd.lt.10)
>          c = tostring(dd)
>          d = 0+c
>          else
>          d = dd
>          end if
>          return(yyyy+"-"+b+"-"+d)
>      end
>
>      yymd = add_hyphen(ymd)
>      print(yymd)
>
> -------------------------------------------------------------------------------------------------------------
> *Error:*
> fatal: Conditional statements (if and do while) require SCALAR logical
> values, see all and any functions
>
> -------------------------------------------------------------------------------------------------------------
> *What I want:*
> The input has no "units" so I can't use the cd_string. Any suggestions on
> how I can do this correctly in NCL?
> I'll appreciate any help.
>
>
> Sincerely,
> Lyndz
>
>
>
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