Plotting multiple variables in boxchart

I have a two datasets containing litter item counts for several rivers at multiple locations. Each value in the dataset represents the item count per location. For each river (having multiple locations each) I would like to plot a boxchart for their distribution (boxplot) in item counts in two different periods: spring and autumn.

My arrays (both for spring and for autumn) are structured like this:

river_1 river_2 river_3

353 412 643

389 124 123

352 645 333

.... .... ....

Running the following code produces the following graph:

riverorder = {'Grevelingen','Haringvliet','Lek','Maas','Vechte','Rijn','Schelde','Waal','Nieuwe Waterweg','IJssel','Type'};

load('items_boxchart_autumn.mat')
load('items_boxchart_spring.mat')
items_boxchart_autumn = [items_boxchart_autumn(:,1:4),NaN(209,1),items_boxchart_autumn(:,5:end)]; %fixing vechte: no data in autumn

close all; figure; set(gcf,'Position',[100 100 1000 500]); boxchart(items_boxchart_spring);
title('Statistieken per meetgebied (totaal)');ylabel('Items per meter (rivier)oever'); set(gca,'Yscale','log'); grid on
yticklabels({'0.01','0.1','1','10','100','1000'}); ylim([0 200])
xticklabels(riverorder)

How can I create a graph like this, where the blue boxplots would be the spring data, and the orange ones would be the autumn data?:

All the best,

Paolo

[VBBV]

Read This for more information

Answer 1

[Cris LaPierre]

Your desired plot comes straight from an example on the page VBBV linked to, complete with sample code and an explanation. You might find some of the comments in this answer insightful.

tbl = readtable('TemperatureData.csv')

tbl = 565×4 table
    Year       Month       Day    TemperatureF
    ____    ___________    ___    ____________

    2015    {'January'}     1          23     
    2015    {'January'}     2          31     
    2015    {'January'}     3          25     
    2015    {'January'}     4          39     
    2015    {'January'}     5          29     
    2015    {'January'}     6          12     
    2015    {'January'}     7          10     
    2015    {'January'}     8           4     
    2015    {'January'}     9          20     
    2015    {'January'}    10          16     
    2015    {'January'}    11          19     
    2015    {'January'}    12          31     
    2015    {'January'}    13          20     
    2015    {'January'}    14          15     
    2015    {'January'}    15          23     
    2015    {'January'}    16          22     

monthOrder = {'January','February','March','April','May','June','July', ...
    'August','September','October','November','December'};

tbl.Month = categorical(tbl.Month,monthOrder);
boxchart(tbl.Month,tbl.TemperatureF,'GroupByColor',tbl.Year)

ylabel('Temperature (F)')
legend