Find minimum for cell arrays

P & z are both 10x1300 cell arrays, how do i find the minimum P value at z=1 after i obtained the index, eg.

Columns 1297 through 1300
    [1×23 double]    [1×29 double]    [1×23 double]    [1×25 double]
    [1×25 double]    [1×25 double]    [1×25 double]    [1×27 double]
    [1×25 double]    [1×27 double]    [1×27 double]    [1×25 double]
    [1×29 double]    [1×29 double]    [1×25 double]    [1×23 double]
    [1×25 double]    [1×23 double]    [1×27 double]    [1×27 double]
    [1×27 double]    [1×23 double]    [1×21 double]    [1×23 double]
    [1×29 double]    [1×27 double]    [1×27 double]    [1×27 double]
    [1×21 double]    [1×21 double]    [1×29 double]    [1×27 double]
    [1×25 double]    [1×25 double]    [1×21 double]    [1×27 double]
    [1×25 double]    [1×25 double]    [1×25 double]    [1×23 double]

index=cellfun( @(Z) find(abs(Z-1)<0.005), z, 'uniform', 0);

index results Columns 1297 through 1300

      [1×0 double]    [1×0 double]    [1×0 double]    [1×0 double]
      [1×0 double]    [1×0 double]    [1×0 double]    [1×0 double]
      [        25]    [1×2 double]    [1×2 double]    [1×2 double]
      [1×2 double]    [1×2 double]    [1×2 double]    [1×2 double]
      [1×2 double]    [1×2 double]    [1×2 double]    [1×2 double]
      [1×0 double]    [1×0 double]    [1×2 double]    [1×2 double]
      [1×0 double]    [1×0 double]    [1×0 double]    [1×0 double]
      [1×0 double]    [1×0 double]    [1×0 double]    [1×0 double]
      [1×0 double]    [1×0 double]    [1×0 double]    [1×0 double]
      [1×0 double]    [1×0 double]    [1×0 double]    [1×0 double]

min_P=min(P(index)) < how do i change this such that the minimum of all P values from index can be found.

[Image Analyst]

You forgot to attach P and z in a .mat file, so how can people try any code to help you?

[Joseph Lee]

You can consider them as just random numbers, its a long code of calculations to get P and z. They're the same size, you can even consider P as z, it is simply just the reverse of

cellfun( @(Z) find(abs(Z-1)<0.005), z, 'uniform', 0);

You have already seen the previous step to this. I just need to find the minimum among different sized cells, I dont think the exact data is required.

https://www.mathworks.com/matlabcentral/answers/367403-adding-random-data-to-left-and-right-of-each-element-in-a-matrix