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svdfit-measure_errors [message #72111]

Sun, 08 August 2010 10:48

sid
Messages: 50
Registered: January 1995

Member

Hi,
I am fitting my data with 3 degree polynomial, so im using svdfit,
in that im setting the measure_errors keyword to a named variable, say
suppose,
idl>n=n_elements(y)
idl>e=dblarr(n)
idl>res=svdfit(x,y,4,measure_errors=e,yfit=y1)
but if I print e an array is displayed with full of zeros and also I
get warning message like this, '% SVDFIT: Warning: 3 singular values
found.hy this happens'.
Any of you please explain me why it happens. Moreover if I don't set
this keyword then im not getting any warning like the above.
what should I do to get rid of this.
regards
sid

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By: sid on Sun, 08 August 2010 10:48

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