Yearly maximum of a dataset

Hi,

Using a large dataset, I have to determine the yearly maximum value. As the dataset is a table, the function retime doesn't seem te work. Can any of you help me with which function should work?

clear; clc; close all;

filename = 'data_1981_2020_FH';

Data1 = readtable(filename,'PreserveVariableNames',true);

Data1(:,1)=[]; % Remove the 1st column

Data1.YYYYMMDD=datetime(string(Data1.YYYYMMDD),'InputFormat','yyyyMMdd'); % Convert to datetime format

Gmean=groupsummary(Data1,"YYYYMMDD",'day',"mean"); % Calculate daily mean

Gmean.GroupCount=[]

Gmean.mean_HH=[]

%Gmax=groupsummary(Data1,"YYYYMMDD",'year',"max");

TT2_data_year = retime(Gmean,'yearly','max')

%tsmax = max(Data1,'mean_FH','year')

%YrMean = retime(Gmean, 'yearly', 'max'); % Yearly Maximum

%Max = [YrMean.Times.Year YrMean.mean_FH]

[Simon Chan]

Did you try my reply on your previous question?

G2 = groupfilter(Data1,'YYYYMMDD','year',@(x) x==max(x),'FH')

[Murielle van Pampus]

Thank you, this works perfect! Thank you so mucht :)