MATLAB: Infinite for loop getting stuck. Creating a new column containing a variable.

for loopMATLAB

Hi, I am trying to generate a new column variable within a table which is conditional on 2 other values. The for loop I am using to generate it is getting stuck, however. It is generating the right values for me but just gets stuck and goes through the column over and over again. Any help would be appreciated:
data.signal = zeros(size(data.NAPMPMIIndex));
 for indx=1:numel(data.NAPMPMIIndex)
   if(data.NAPMPMIIndex(indx) > 50 & data.AboveMA(indx)> 0.5)
     data.signal(indx) = 0.5
   elseif(data.NAPMPMIIndex(indx) > 50 & data.AboveMA(indx)< 0.5)
     data.signal(indx) = -0.5
   elseif(data.NAPMPMIIndex(indx) < 50 & data.AboveMA(indx)> 0.5)
     data.signal(indx) = 1
   else
     data.signal(indx) = -1;
   end
 end

Best Answer

kk = [data.NAPMPMIIndex > 50, data.AboveMA > .5];
g = findgroups(kk(:,1),kk(:,2));
a = [-1;1;-.5;.5];
data.signal = a(g);
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