MATLAB: Plot max, min, mean of a value in a matrix

matrix manipulationmeanplottable

I have a .txt file with all the temperature of a city in different years. I need to plot maximum, minimum and medium of one month from input, per each year. Example:
input month = 8
month 8 year 1996 --> max, min, mean
month 8 year 1997 --> max, min, mean
month 8 year 1998 --> max, min, mean 
(all in one graph)
I've tried this:
clear all
%load file in a matrix
mt=load('LONDON.txt');
%I save only positive value because sometimes the file doesn't have value in a row
pos = mt(mt(:,4) > 0,:);
%input from keyboard of the month that I want to plot
month= input('\n enter a month\n');
%new matrix with all the positive value of the chosen month
fin = pos(pos(:,1) == month,:);
%matrix value in a table
 T = array2table(fin, 'v',{'month','day','year','temperature'});
%value of each year
res95 = T(T.month==1995,:);
res96 = T(T.month==1996,:);
res97 = T(T.month==1997,:);
res98 = T(T.month==1998,:);
res99 = T(T.month==1999,:);
res00 = T(T.month==2000,:);
res01 = T(T.month==2001,:);
res02 = T(T.month==2002,:);
res03 = T(T.month==2003,:);
res04 = T(T.month==2004,:);
res05 = T(T.month==2005,:);
res06 = T(T.month==2006,:);
res07 = T(T.month==2007,:);
res08 = T(T.month==2008,:);
res09 = T(T.month==2009,:);
res10 = T(T.month==2010,:);
res11 = T(T.month==2011,:);
res12 = T(T.month==2012,:);
res13 = T(T.month==2013,:);
res14 = T(T.month==2014,:);
now I have different tables only with the month chosen. How can I plot theme all in one graph ? Thank you.

Best Answer

Using a timetable makes this a lot easier
filename = 'LONDON';
data = readtable([filename,'.txt']);
data = data(data{:,4}>=0,:); %remove negative
choice_year = 1995;
data.dt = datetime(data{:,[3 1 2]});
data_TT = timetable(data.dt,data{:,4});
data_monthly_mean= retime(data_TT(data_TT.Time.Year==choice_year,:),'monthly','mean');
data_monthly_max = retime(data_TT(data_TT.Time.Year==choice_year,:),'monthly','max');
data_monthly_min = retime(data_TT(data_TT.Time.Year==choice_year,:),'monthly','min');
figure(1)
plot(data_monthly_mean.Var1)
hold on
plot(data_monthly_max.Var1)
plot(data_monthly_min.Var1)
hold off
legend({'mean','max','min'})
title([filename ' monthly analysis for ' num2str(choice_year)])
Read more about timetables here: https://www.mathworks.com/help/matlab/timetables.html
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