Problem with plotting with 3 different y axes

Hello everyone,

I tried to plot this with three different y axes, but I don't get the plot.

load('giulia_year')
x=giulia_year.DateA

x = 19×1 datetime array
   15-Dec-1998
   07-Dec-1999
   30-Nov-2000
   13-Nov-2001
   30-Dec-2002
   04-Jan-2004
   22-Nov-2004
   24-Nov-2005
   15-Dec-2006
   22-Jan-2008
   22-Jan-2009
   22-Jan-2010
   22-Jan-2011
   22-Jan-2012
   09-Jan-2013
   05-Jan-2014
   31-Jan-2015
   31-Jan-2016
   31-Jan-2017

y1=giulia_year.Diff_Values

y1 = 19×1

NaN 49.8592 -0.4379 5.5708 60.9202 32.7120 11.9641 85.5252 15.5492 6.3269

y2=giulia_year.year_values_wind

y2 = 19×1

10.0999 11.2257 8.2535 11.6761 13.6418 10.5961 11.7224 11.0361 9.3854 11.6265

y3=giulia_year.year_values_hum

y3 = 19×1

59.7365 57.2549 55.7660 52.5581 51.6366 50.1699 54.3775 58.6254 59.2755 55.5342

ylabels{1}='mm w.e.';
ylabels{2}='knt';
ylabels{3}='%';
[ax,hlines] = plotyyy(giulia_year.DateA,giulia_year.Diff_Values,giulia_year.DateA,giulia_year.year_values_wind,giulia_year.DateA,giulia_year.year_values_hum,'mm.w.e.','knt','%')

Unrecognized function or variable 'plotyyy'.

egend(hlines, 'y = giulia_year.Diff_Values','y = giulia_year.year_values_wind','y = giulia_year.year_values_hum',2)

Can anyone help me please?

Thank you.

Answer 1

[Dave B]

Unfortunately there is no plotyyy, nor is there a more-than-2 version of plotyy's succesor yyaxis.

You can kind of fake it on recent releases (I think this will work beginning in R2020b, but tested it in R2021a) with tiledlayout:

load('giulia_year')
x=giulia_year.DateA;
y1=giulia_year.Diff_Values;
y2=giulia_year.year_values_wind;
y3=giulia_year.year_values_hum;
ylabels{1}='mm w.e.';
ylabels{2}='knt';
ylabels{3}='%';

%%
t=tiledlayout(1,1,'TileSpacing','tight');
ax=axes(t);
yyaxis left
plot(x,y1)
ylabel(ylabels{1})
yyaxis right
plot(x,y2)
ylabel(ylabels{2})

% Use a second axes
ax2=axes(t);
h=plot(ax2,x,y3,'SeriesIndex',3);
ax2.Visible='off';

% Now use a third axes for the y axis for the third plot
% Put it in the west tile, and use a DataAspectRatio that 
% makes it narrow
ax2_axis=axes(t);
ax2_axis.Layout.Tile='west';
ax2_axis.YColor=h.Color;
ax2_axis.DataAspectRatio=[1 eps 1];

% This tries to link up axes limits. Interactively panning the 
% axes might not work work exactly as expected...(but not horrible 
% either)
linkaxes([ax2 ax2_axis],'y')
linkaxes([ax ax2],'x')
ylabel(ylabels{3})