Remove the Last Entry of Many Fields of a Structure

I have a multiple structures with many fields, and each field has thousands of entries (rows). I need the each field in a particular structure to have the same number of entries (rows). For instance, here is a sample of my situation:

data.test1=1:10;
data.test2=3:12;
data.test3=2:11;
data.test4=1:10;
data.test5=2:10;
data.test6=4:12;
data.test7=5:13;

data = structfun(@transpose,data,'UniformOutput',false);

How can I trim the last entry (row) from data.test1, data.test2, data.test3, and data.test4 programmatically? (In my real structures, I have many more fields, so I would prefer to not trim each field one at a time. I would greatly prefer to trim all the necessary fields in one command.) Will someone please help?

Answer 1

[Adam Danz]

dataTrimmed = structfun(@(s)s(1:end-1),data,'UniformOutput',false);

[Allen Hammack]

Thank you for the response, Adam Danz!

You're solution removes the last entry (row) in all the fields. I want to remove the last entry (row) in the fields that are longer than the shortest field. So, so my example, I only want to remove the last entry (row) in data.test1, data.test2, data.test3, and data.test4 while leaving data.test5, data.test6, and data.test7 unchanged. How could I modify your suggestion to edit only the fields that are the longest length?

[Adam Danz]

Sorry, I misunderstood. Here's how to do that,

data.test1=1:10;
data.test2=3:12;
data.test3=2:11;
data.test4=1:10;
data.test5=2:10;
data.test6=4:12;
data.test7=5:13;
data = structfun(@transpose,data,'UniformOutput',false)

data = struct with fields:
    test1: [10×1 double]
    test2: [10×1 double]
    test3: [10×1 double]
    test4: [10×1 double]
    test5: [9×1 double]
    test6: [9×1 double]
    test7: [9×1 double]

% Get min count
minCount = min(structfun(@numel, data))

minCount = 9

% trim to min count
dataTrimmed = structfun(@(s)s(1:minCount),data,'UniformOutput',false)

dataTrimmed = struct with fields:
    test1: [9×1 double]
    test2: [9×1 double]
    test3: [9×1 double]
    test4: [9×1 double]
    test5: [9×1 double]
    test6: [9×1 double]
    test7: [9×1 double]

[Allen Hammack]

That's perfect! thank you so much!

Answer 2

[Sean de Wolski]

data.test1=1:10;
data.test2=3:12;
data.test3=2:11;
data.test4=1:10;
data.test5=2:10;
data.test6=4:12;
data.test7=5:13;
n = structfun(@numel,data);
toremove = n-min(n);
fn = fieldnames(data);
for ii = 1:numel(fn)
    data.(fn{ii}) = data.(fn{ii})(1:(numel(data.(fn{ii}))-toremove(ii)));
end
struct2table(data)

ans = 1×7 table
      test1         test2         test3         test4         test5         test6         test7   
    __________    __________    __________    __________    __________    __________    __________

    1×9 double    1×9 double    1×9 double    1×9 double    1×9 double    1×9 double    1×9 double

The interior of that loop could obviously be made clearer but I'll leave that as an exercise.

[Allen Hammack]

Thank you, Sean! This solution works as well!