MATLAB: What’s the best way to shorten this

loop

This is a very lengthy code for something repetitive, I want to know whether there is a simpler, more efficient way of doing this.
The purpose of the code is to load text files and trim them according to the same criteria and check which one is the shortest and use the shortest length in calculations that happen later in the code.
T1 = dlmread("Trial 1");
T2 = dlmread("Trial 2");
T3 = dlmread("Trial 3");
T4 = dlmread("Trial 4");
T5 = dlmread("Trial 5");
T6 = dlmread("Trial 6");
T7 = dlmread("Trial 7");
T8 = dlmread("Trial 8");
T9 = dlmread("Trial 9");
T10 = dlmread("Trial 10");
%removal of unwanted elements from the raw data array
T1(T1(:,11)<=0 ,:) = [];
T1(T1(:,3)==25 ,:) = [];
T1(T1(:,3)<500 ,:) = [];
T1(T1(:,5)==0    ,:)= [];
T1(find(T1(:,12)>780,1):end, :) = [];
T2(T2(:,11)<=0 ,:) = [];
T2(T2(:,3)==25 ,:) = [];
T2(T2(:,3)<500 ,:) = [];
T2(T2(:,5)==0    ,:)= [];
T2(find(T2(:,12)>780,1):end, :) = [];
T2(T2(:,11)<=0 ,:) = [];
T3(T3(:,3)==25 ,:) = [];
T3(T3(:,3)<500 ,:) = [];
T3(T3(:,5)==0    ,:)= [];
T3(find(T3(:,12)>780,1):end, :) = [];
T4(T4(:,11)<=0 ,:) = [];
T4(T4(:,3)==25 ,:) = [];
T4(T4(:,3)<500 ,:) = [];
T4(T4(:,5)==0    ,:)= [];
T4(find(T4(:,12)>780,1):end, :) = [];
T5(T5(:,11)<=0 ,:) = [];
T5(T5(:,3)==25 ,:) = [];
T5(T5(:,3)<500 ,:) = [];
T5(T5(:,5)==0    ,:)= [];
T5(find(T5(:,12)>780,1):end, :) = [];
T6(T6(:,11)<=0 ,:) = [];
T6(T6(:,3)==25 ,:) = [];
T6(T6(:,3)<500 ,:) = [];
T6(T6(:,5)==0    ,:)= [];
T6(find(T6(:,12)>780,1):end, :) = [];
T7(T7(:,11)<=0 ,:) = [];
T7(T7(:,3)==25 ,:) = [];
T7(T7(:,3)<500 ,:) = [];
T7(T7(:,5)==0    ,:)= [];
T7(find(T5(:,12)>780,1):end, :) = [];
T8(T8(:,11)<=0 ,:) = [];
T8(T8(:,3)==25 ,:) = [];
T8(T8(:,3)<500 ,:) = [];
T8(T8(:,5)==0    ,:)= [];
T8(find(T8(:,12)>780,1):end, :) = [];
T9(T9(:,11)<=0 ,:) = [];
T9(T9(:,3)==25 ,:) = [];
T9(T9(:,3)<500 ,:) = [];
T9(T9(:,5)==0    ,:)= [];
T9(find(T9(:,12)>780,1):end, :) = [];
T10(T10(:,11)<=0 ,:) = [];
T10(T10(:,3)==25 ,:) = [];
T10(T10(:,3)<500 ,:) = [];
T10(T10(:,5)==0    ,:)= [];
T10(find(T10(:,12)>780,1):end, :) = [];
L1=length(T1);
L2=length(T2);
L3=length(T3);
L4=length(T4);
L5=length(T5);
L6=length(T6);
L7=length(T7);
L8=length(T8);
L9=length(T9);
L10=length(T10);
Lmin = min([L1(:);L2(:);L3(:);L4(:);L5(:);L6(:);L7(:);L8(:);L9(:);L10(:)]);

Best Answer

This should get you started but it's not tested and there will likely be some kinks to work out. I'd be glad to help more if needed. 
trials = ["Trial 1", "Trial 2", "Trial 3", "Trial 4", "Trial 5", ...
    "Trial 6", "Trial 7",  "Trial 8",  "Trial 9",  "Trial 10" ];
nTrials = numel(trials);
T = cell(size(trials));
for i = 1:nTrials
    T{i} = dlmread(trials(i));
    %removal of unwanted elements from the raw data array
    T{i}(T{i}(:,11)<=0 ,:) = [];
    T{i}(T{i}(:,3)<500 ,:) = [];
    T{i}(T{i}(:,5)==0    ,:)= [];
    T{i}(find(T{i}(:,12)>780,1):end, :) = [];
end
L = cellfun(@length, T,'UniformOutput', false);
Lmin = min([L{:}]);
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