MATLAB: Find min value in one column based on repeated value from another column

Question

Hi

I have a large table that lists a set of data in regards to: Location, polulation, rainfall:

Locations are listed multiple times of a general area and have different rainfall amounts, i want o find the min and max for each location overall even though the locations are listed multiple times.

Data table looks like this:

Location Population rainfall

1 a 10

1 b 2

1 c 0

1 d 100

2 a 2

2 b 125

2 c 5

2 d 10

So i'm wanting my output of a new table to be something like

Location Min Max

1 0 100

2 2 125

I've tried using for loops and looking for inbuilt functions aswell as order it the set but a column but i'm having no luck

Answer 1

If your original table is T, I believe this should work:

T2 = table;
[G,T2.Location] = findgroups(T.Location);
T2.Min = splitapply(@min, T.rainfall, G);
T2.Max = splitapply(@max, T.rainfall, G);