How to set the grid of the right yyaxis?
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Albert Bing
el 1 de Dic. de 2020
Editada: Star Strider
el 1 de Dic. de 2020
I have a figure that has 2 yyaxis, and I want the grid shown on the right yyaxis. But the command grid on is only effective on the left yyaxis.
Sure I can just plot the lines of the grids, but the lines are on the top of the other lines or patches. The good thing of the grid is that they are always on the bottom layer, while the lines user plotted are on the top layer.
x1=[200, 300, 250, 520, 340];
x2=[0.3, 0.2, 0.12, 0.4, 0.22];
figure;
yyaxis left
bar(x1);
yyaxis right
plot(x2);
grid on
The grid is on the left yyaxis, while I want it to be of the right yyaxis. What should I do?
2 comentarios
KALYAN ACHARJYA
el 1 de Dic. de 2020
Editada: KALYAN ACHARJYA
el 1 de Dic. de 2020
Answer from MATLAB "Grid lines correspond with the tick mark locations along the left y-axis". Option plotyy
Respuesta aceptada
Star Strider
el 1 de Dic. de 2020
Editada: Star Strider
el 1 de Dic. de 2020
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:
.
3 comentarios
Más respuestas (1)
Adam Danz
el 1 de Dic. de 2020
Editada: Adam Danz
el 1 de Dic. de 2020
Workaround
Set the vertical grid lines
ax = gca();
ax.XGrid = 'on';
set the horizontal grid lines using yline after setting the ytick and ylim. If the ylim or yticks change, the horizontal reference lines will not update. You could add a listener to fix that. Also, the horizonal lines will always be on top. To put them on the bottom see this answer.
yyaxis right
ylim([-1,3])
ax.YTick = -1:.5:3;
yl = arrayfun(@(y)yline(ax, y,'LineStyle',ax.GridLineStyle,'Color',ax.GridColor,'Alpha',ax.GridAlpha),ax.YTick);
7 comentarios
Adam Danz
el 1 de Dic. de 2020
Editada: Adam Danz
el 1 de Dic. de 2020
You can use plot() or line() instead of yline(). The main difference is that yline will always extend to the axis edges but if xlim is changed then lines produced by plot() or line() may no longer extend to the axis edges. You could over-estimate the edges to mitigate that problem.
Example:
yyaxis right
ax = gca();
ax.XGrid = 'on';
ylim([-1,3])
xl = xlim();
xlExtended = xl + [-range(xl), range(xl)]; % Optional
ax.YTick = -1:.5:3;
hold(ax, 'on')
yl = plot(ax, xlExtended,[ax.YTick',ax.YTick'] ,'LineStyle',ax.GridLineStyle,'Color',[ax.GridColor, ax.GridAlpha],'Marker','none');
xlim(xl)
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