[R] svd error

[Spencer Graves]

Dear Prof. Ripley: 

      With library(MASS), I got the following in R 2.0.1 under Windows 
2000: 

 > X
     [,1] [,2]
[1,]    1    3
[2,]    2   NA
 > ginv(X)
Error in svd(X) : infinite or missing values in x

      This may not relate to Tongtong Wu's problem, but it used "ginv" 
in library(MASS) as you suggested and did produce the cited error message. 

      spencer graves

Prof Brian Ripley wrote:

> On Thu, 27 Jan 2005, WU,TONGTONG wrote:
>
>> Hi,
>>
>>  I met a probem recently and need your help.  I would really appreciate
>> it.
>>
>>  I kept receiving the following error message when running a program:
>>
>> 'Error in svd(X) : infinite or missing values in x'.
>>
>> However, I did not use any svd function in this program though I did
>> include the function pseudoinverse.  Is the problem caused by doing
>> pseudoinverse?
>
>
> Where did you find that function?  It is not part of R as it ships, 
> and it *may* be part of GeneTS, where it calls svd after squaring the 
> matrix. But there are simpler pseudoinverse functions (e.g. ginv in 
> MASS) that will not introduce that error.
>
> The tool you needed was traceback(): try it to see what it tells you 
> here.
>