Plotting weather graphs so subsequent years are superimposed rather than sequential

I have many years of weather data to plot. At present the data is all in one long column. But I don't want the graph to be one long graph, I want each different year of data to be superimposed on the same axis so I can make comparisons from year to year.

Some sample data is attached.

Much appreciated.

Wendy

Answer 1

[KSSV]

T = readtable('Matlab graph question.xlsx') ; 
theyears = year(T.(1)) ;
[c,ia,ib] = unique(theyears) ;
c(isnan(c)) = [] ;
% plot 2018 year data 
idx = theyears==2018 ;
plot(T.(1)(idx),T.(2)(idx))