Boxplot and Plot Overlay Problem

Hello, I am new to Matlab

I happen to want to plot a trendline over a boxplot (same graph, same X-axis and different Y-axis but the Y-values are on the same scale).

All the vectors (X(=year), Y1(=diox), Y2(=c)) are the same size:1x191 double.

diox are 191 different values which are assigned to a "year".

year are 191 values allthough there are many replicates (eg. the value 2005 appears 7 times etc.)

c are 191 values that correspond to the mean of each "year" for the "diox" which were created with a for-if loop - I thought that it would be easier to have the exact same X-axis which is "year".

When it runs, I get the boxplot but I don't get the plot (although I get the yyaxis right axis correct).

Any help would be appreciated!

figure; 
xlim([2004 2022]); ylim([0 1.5])
yyaxis left
boxplot(diox,year); 
hold on
ylabel('WHO-PCDD/F-TEQ/product')
yyaxis right
plot(c,year)
ylabel('Annual TEQ Means')
title(sprintf('Dioxins'))
hold off

[Adam Danz]

It would be easier to troubleshoot if you attach the data.

Answer 1

[VBBV]

As you say, X, Y1 , Y2 are same size and since Y2 (c) is a vector with mean of each year, plot the graph using the unique values of the year against the X (year)

figure; 
xlim([2004 2022]); ylim([0 1.5])
yyaxis left
boxplot(diox,year); 
hold on
ylabel('WHO-PCDD/F-TEQ/product')
yyaxis right
% ------------------>>>
plot(c,unique(year))  % take the unique year values
ylabel('Annual TEQ Means')
title(sprintf('Dioxins'))
hold off

Also, when you say,

c are 191 values that correspond to the mean of each "year" for the "diox" which were created with a for-if loop

how do you get 191 values when you calculate mean for each year ?

Data for repetitve occurances of the same year are considered as one set, and mean of that data must yield a scalar

Could you show us how your for-loop code is built ? If possible attach your data as well.