[Numpy-discussion] append number to vector

Henry Harpending harpend at xmission.com
Tue Sep 25 15:20:04 CDT 2001


I often find myself wanting to append a number to a vector.  After fumbling
experimentation I use 

def comma(ar,inint):
    "comma(array,integer) returns array with integer appended"
    t=array([inint,])
    return(concatenate((ar,t),1))

which is used like the comma in apl, i.e.  ar <- ar, inint.


This seems klutzy to me.  Is there a simpler way to do it?  If ar were a
list, ar.append(inint) works, but no such luck after ar has become an array.

Thanks, Henry Harpending, University of Utah




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