Re: help: standardize problemA

shea AT ucar.edu

---
Regarding the comment that
>>I try to use the following method to standardize my data,
>>but there are a lots data whicj is larger than 1 after I standardize.
>>  tsin   = fbindirread ("Nino34_Had.grd", 0 , (/1620/),"float")
>>  var_ts = stddev(tsin)
>>  avg_ts = avg(tsin)
>>  print(var_ts)
>>  print(avg_ts)
>>  ts=tsin/var_ts
It is not unexpected that standardizing yields values > 1.
If the data are normally distributed the 68% will be less
than (+/-)1; 27% (=95-68) will be between 1 and 2 [ about 4% will
be be between 2 and 3;  nd 0.3% > 3.
The point of standardizing is to get the variance=1.0
Note: I assume u have a good reason for standardizing the
       data prior to using spectral analysis?
Regadrds,
Dennis Shea
>Fri, 15 Apr 2005, Joel Norris wrote:
> Apparently an error was introduced into the documentation when the new
> website was set up.  Try
>
> ts = dim_standardize(tsin,0)
>>    ts = dim_standardize(tsin)
>> ______________________________
>> but it cann't work, the error message is following:
>>
>> fatal:syntax error: function dim_standardize expects 2 arguments, got 1
>> fatal:Syntax Error in block, block not executed
> -- 
> Joel Norris       Assistant Professor of Climate and Atmospheric Sciences
>
> Scripps Institution of Oceanography     email: jnorris@ucsd.edu
> University of California, San Diego     phone: (858) 822-4420
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>
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