Ignore missing data
- To: mathgroup at smc.vnet.net
- Subject: [mg118966] Ignore missing data
- From: dim <dimemples at gmail.com>
- Date: Wed, 18 May 2011 07:15:23 -0400 (EDT)
- Reply-to: comp.soft-sys.math.mathematica at googlegroups.com
Hello everybody!
I would like to know how to ignore missing data and to be more specific I'll give an example.
his = {1,2,3,4,5,6,7,,9};
simcs1 = RandomReal[10, 9];
simcs2 = RandomReal[10, 9];
simcsi = a1*simcs1 + a2*simcs2;
(his - simcsi)^2;
er = Plus @@ %
Minimize[{er, 0 <= a1 <= 1 && 0 <= a2 <= 1 && a1 + a2== 1}, {a1, a2}]
It doesn't work, since the 8th value of "his" is missing. Do you know how i could make Mathematica ignore also the corresponding values of simcs1 and simcs2? Namely, in my example how to ignore the 8th value of simcs1 and simcs2.
Please note that i don't want to delete the missing data, neither to make them equal to 0.
Thank you in advance!