Assignment with 0 - Alternative

Hi everybody,

I have got the following code:

PortMembers=369x1 cell with ISINS
GlData.instrISIN(:,1) = 1640x1 cell with ISIS

rebRankings=NaN(nDates,nPortMembers,nFactors);
% create matrix with rankings on rebalancing dates only
[~,ind]=ismember(PortMembers(:,1),GlBbgRawData.instrISIN(:,1));
rebRankings(dRebInd,:,:)=GlBbgRawData.factorRanks(:,ind,:);

The resulting variable ind contains one 0 because the ISIN xxx in PortMembers is not available in GlData.instrISIN(:,1). In this particular case, it means that ISIN in PortMembers on 'place' 349x1 in not available in GlData.instrISIN(:,1). In such cases I would like to insert NaNs in rebRankings. It means, rebRankings(dRebInd,349,:) would contain NaNs.

Do you know any elegant solutions for those kind of questions? (if possible, no iterations.)

Thanks in advance.