MATLAB: Plotyy Display Gridlines Axis

gridlines

I am using plotyy, I managed to show the grid for the function on the left using 'grid on', but how do I show the gridlines using the function on the right?

Best Answer

You can select the second axis handle for the data plotted with respect to the right y-axis. If you define an output for the plotyy function, the output variable will contain the figure axes handles in a vector. You can then use the set function to define the 'Xgrid' and 'Ygrid' states as 'on'.

For example:

% Outputs of the plotyy are the axes handles (in a vector) and each line handle
[haxes,hline1,hline2] = plotyy(t,z1,t,z2,'semilogy','plot');
% Turn the grid for the second axis on
set(haxes(2),'Xgrid','on')
set(haxes(2),'Ygrid','on')

Check out the documentation for more information on the set function:

http://www.mathworks.com/help/matlab/creating_plots/plotting-with-two-y-axes.html

Related Solutions

MATLAB: Fontsize and properties of Xticklabels using figure handles

"How do I cange the Xticklabels of a plot using figure handles?"

Get the axis handle from the figure handle.

ax = gca(figureHandle);

Get the XAxis handle from the axis handle and set the FontSize of the x-axis only.

ax.XAxis.FontSize = 16;

or set the fontsize of the entire axis (x & y)

ax.FontSize = 14;

Set the XTick and XTick labels

ax.XTick = 1:4; 
ax.XTickLabel = {'A' 'B' 'C' 'D'};

MATLAB: How to set the grid of the right yyaxis

Another option is to create new right-axis tick positions to match the tick positions on the left:

x1=[200, 300, 250, 520, 340];
x2=[0.3, 0.2, 0.12, 0.4, 0.22];
figure;
yyaxis left
bar(x1)
ytl = get(gca, 'YTick');                                    % Get Controlling Left Ticks

yyaxis('right');
plot(x2)
ytr = get(gca, 'YTick');                                    % Get Right Tick Values

ytrv = linspace(min(ytr), max(ytr), numel(ytl));            % Create New Right Tick Values Matching Number Of Left Ticks
ytrc = compose('%.2f',ytrv);                                % Tick Label Cell Array

set(gca, 'YTick',ytrv, 'YTickLabel',ytrc)                   % Set New Right Tick Labels

grid on

producing:

EDIT — (1 Dec 2020 at 17:48)

To get ticks and tick labels with more rational spacing:

x1=[200, 300, 250, 520, 340];
x2=[0.3, 0.2, 0.12, 0.4, 0.22];
figure;
yyaxis left
bar(x1)
ytl = get(gca, 'YTick');                                    % Get Controlling Left Ticks
yyaxis('right');
plot(x2)
ytr = get(gca, 'YTick');                                    % Get Right Tick Values
tinc = diff(ylim)/numel(ytl);                               % Tick Increment
ytrv = min(ylim):tinc:(tinc*(numel(ytl)+1));
ylim([min(ytrv) max(ytrv)])                                 % Set New ‘ylim’
ytrc = compose('%.2f',ytrv);                                % Tick Label Cell Array
set(gca, 'YTick',ytrv, 'YTickLabel',ytrc)                   % Set New Right Tick Labels
grid on

producing:

Best Answer

Related Solutions

MATLAB: Fontsize and properties of Xticklabels using figure handles

MATLAB: How to set the grid of the right yyaxis

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