Confronting column values of two rows in a table?

Hello everyone,

I have a table (see attached file) showing specific data (variables as columns) for every element name (rows). I would like to implement a code that allows me to compare between two elements (rows) their respective variable value.

For example, for the giving table, I would like that the code compares the “GWP” variable between element “T” (GWP_T=500) and element “P1” (GWP_P1=400) and it gives me the element name that has a higher “GWP” between the two à “T” (GWP_T=500).

How can I do that?

Answer 1

[Voss]

t = load('Table.mat');
t = t.Comp;

names = {'T' 'P1'};
[~,idx] = max(t.GWP(ismember(t.Name,names)));
max_name = names{idx}

max_name = 'T'

[Fabio]

Hello Benjamin, thanks a lot for your answer and help, this is what I was looking for.

Another question, what if as input I have a set of pair elements like : names = {'T' 'P1', 'T' 'S2', 'T' 'P2', 'T' 'S3' }; and as result I want to calculate for every set of pairs which element has the highest “GWP” value?

We would need to implement a for loop right?

[Voss]

A for loop would work, yes. You would just perform the operation specified in my answer for each pair of variable names, i.e., the names variable up there would get each pair of names and the rest would be the same.

t = load('Table.mat');
t = t.Comp;

all_names = {'T' 'P1'; 'T' 'S2'; 'T' 'P2'; 'T' 'S3' }; % I made a slight modification: to use a 4-by-2 cell array here rather than a 1-by-8 but you can do it with a 1-by-8 if you need to
N = size(all_names,1);
max_names = cell(N,1);
for i = 1:N
    names = all_names(i,:);
    [~,idx] = max(t.GWP(ismember(t.Name,names)));
    max_names{i} = names{idx};
end
display(max_names);

max_names = 4×1 cell array
    {'T'}
    {'T'}
    {'T'}
    {'T'}

[Fabio]

Ok perfect. Thanks a lot