i want to search index number of element (based on condition)in an array and magnitude corresponds to index in matrix

I have matrices from t1 to t24 (24 matrices of size 122249*25)

time matrix and tof is 4D matrix , when value in time matrix equals (or nearer) in tof matrix i want to find the voltage value from the correspoding matrices which is t1 to t24

here when tt value increases from 1 to 2 , it should search should change from t1 to t2

for tt = 1:24
    for rr = 1:24
        for mm = 1:10
            for nn = 1:50
                [~,idx] = min(abs(time(:,1) - tof(mm,nn,rr,tt)));
                voltage(mm,nn,rr,tt) =t(tt)[(idx,rr+1)];  %% here is the error
            end
        end
    end
end

when tt value increases subsequently it should start searching in t(tt)???

in code if i write t1(idx,rr+1) it will search in t1 matrix, like wise when tt value increases searching matrix should also change t2,t3,t4,....t24

any help would be appreciated

[KSSV]

Looks like knnsearch can help you. YOu need not to use loops.

[M.Prasanna kumar]

sir ,i am able to get indices but im unable to the magnitude of that particular index from matrix

[darova]

The question is unclear. You said time and tof matrices are 4D:

time(:,1) - tof(mm,nn,rr,tt))        % what is this?

If your t matrices are cell use:

t{tt}(idx,rr+1)

[M.Prasanna kumar]

sorry its a typing mistake,

time is a column vector and tof is 4D matrix

't' is a matrix not a cell

[Stephen23]

See also earlier discussions with M.Prasanna kumar on the same topic:

https://www.mathworks.com/matlabcentral/answers/476804-how-to-increase-the-number-in-for-loop-as-i-explained-below

https://www.mathworks.com/matlabcentral/answers/430467-extracting-info-from-multiple-matrices#comment_736997

"it will search in t1 matrix ... should also change t2,t3,t4,....t24"

Do NOT do this.

"any help would be appreciated"'

Simply use indexing, then your task is trivially easy (see links above).