I get the following figure with a bar plot :
I would like to remove the XTick with red circles but keep Xtick for the middle of each group of bars (i.e 1024, 10240, 102400, 1024000, 10240000).
I generate this image with the Matlab script below :
x = load('performances.txt');
% Get Runtimes
for i = 1:6
time_seq(1:5,i) = x((i-1)*5+1:i*5,3);
time_gpu(1:5,i) = x((i-1)*5+1:i*5,4);
speedup(1:5,i) = time_seq(1:5,i)./time_gpu(1:5,i);
end
% X axis
sizeArray = [1024 10240 102400 1024000 10240000 102400000]
figure(1);
% Get Histogram
h = bar(log10(sizeArray),log10(speedup(1:5,:)')); % get histogram
% Log10 for x-axis and xtick
set(gca,'Xtick',log10(1024):1:log10(1.024*10^8))
set(gca,'Xticklabel',10.^get(gca,'Xtick'));
set(h(1),'facecolor',[0.5 0.5 1]);
set(h(2),'facecolor',[1 0.5 0.5]);
set(h(3),'facecolor',[0.5 1 0.5]);
set(h(4),'facecolor',[0.5 0.5 0.5]);
set(h(5),'facecolor',[1 0.5 1]);
hPatch = findobj(h,'Type','patch');
set(hPatch,'facealpha',1);
grid on;
title('Benchmark GPU vs CPU');
% Size of WorkGroup
h = legend('N=16','N=32','N=64','N=128','N=256');
v = get(h,'title');
set(v,'string','WorkGroup size');
% Place legend
rect = [0.6,0.25,0.2,0.2];
set(h,'Position',rect,'color','w');
hPatch = findobj(h,'Type','patch');
set(hPatch,'facealpha',1);
xlabel('log(Array size)');
ylabel('log(Speedup)');
% Make right y-axis visible
ax1 = gca;
ax2 = axes('Position', get(ax1, 'Position'));
set(ax2, 'YAxisLocation', 'right', 'Color', 'none', 'XTickLabel', []);
set(ax2, 'YLim', get(ax1, 'YLim'));
I tried different things but couldn't make them disappear, anyone would have an idea or a clue ?
Thanks
It happens because of the last 3 lines in your code where you add the Y-axis from the right side. You need to add the following line at the end:
set(ax2,'XTick',[]);
Here is my result (with fake data):
Related
I want to create a plot with pcolor plot with an contour plot on top. Both with different colormaps - pcolor with "hot", the contour with "gray".
I newer Matlab version multiple colormaps are possible.
The code works, however both axis do not overlap, even if the axes positions are in sync.
%% prepare Data
Data2D = peaks(100);
Data2D = Data2D -min(Data2D(:));
Data2D = Data2D/max(Data2D(:)) * 100;
steps = 0:05:100;
xAxis = 1:size(Data2D,2);
yAxis = 1:size(Data2D,1);
figure(1); clf
ax1 = axes;
hold on;
% 3D flat plot
caxis([0 100]);
cmap = fliplr(jet(1000));
colormap(ax1, cmap(1:800,:));
hplot = pcolor(ax1, xAxis, yAxis, Data2D);
shading flat; % do not interpolate pixels
set(ax1,'XLim',[xAxis(1) xAxis(end)]);
set(ax1,'YLim',[yAxis(1) yAxis(end)]);
% colorbar
hcb = colorbar('location','EastOutside');
set(hcb, 'Ylim', [0 100]);
%% contour plot
ax2 = axes; linkaxes([ax1,ax2])
colormap(ax2, flipud(gray(1000)));
[C,hfigc] = contour(ax2, xAxis, yAxis, Data2D,steps);
% Hide the top axes
ax2.Visible = 'off';
ax2.XTick = [];
ax2.YTick = [];
set(hfigc, 'LineWidth',1.0);
hold off;
drawnow
If you didn't use ax2.Visible = 'off' you would probably see that the axes' positions are different, since the first axes are squashed to allow room for the colorbar which the second axes don't have.
TL;DR
You need to set the position properties to be equal
ax2.Position = ax1.Position
Demo
You can simulate this with a blank figure:
1.
% Create figure and first axes, which have a colorbar
figure(1)
ax1 = axes();
colorbar('location', 'eastoutside');
Output:
2.
% Add new axes
hold on;
ax2 = axes();
Output (notice the second axes fills the space of the first + colorbar):
3.
% Make the same, so that the second axes also allow for the colorbar
ax2.Position = ax1.Position;
Output (notice thicker numbers showing they are overlapping fully):
I am having trouble getting my title to show when I have a figure with two x-axis.
The plot looks good and the axis scales are as I would like them to be but the second axis label and the title end up outside my figure.
How do I get the plot and axis to have the same size and change the size of the figure to include labels and title?
Here is a minimal example:
x1 = linspace(0, 5);
y11 = sin(x1);
y12 = cos(x1);
x2 = linspace(4, 12);
figure(1)
plot(x1, y11, 'r');
hold on
grid on
plot(x1, y12, 'k');
axis([0 5 -1 1.8]);
legend('sin(x)', 'cos(x)');
xlabel('x')
ylabel('y-label');
ax1 = gca;
ax1_pos = ax1.Position;
ax2 = axes('Position', ax1_pos,...
'XAxisLocation', 'top',...
'YAxisLocation', 'right',...
'Color', 'none');
ax2.YColor = 'w';
title('2:nd Harmonics');
line(x2,0,'Parent',ax2,'Color','k')
xlabel('n');
As a workaround you could pre-define the Position property (i.e. size) of the 1st axes before generating the plot so that the title appears correctly even if you add a 2nd axes. For example, right after the call to figure(1) add something like this:
ax1 = axes('Position',[0.11 0.11 0.75 0.75]);
Also, if you wish to print exponent values in the title you can use Latex formatting as follows:
title('2^{nd} Harmonics');
Here is the whole code with output:
clear
clc
close all
x1 = linspace(0, 5);
y11 = sin(x1);
y12 = cos(x1);
x2 = linspace(4, 12);
figure(1)
%// Set axes position manually
ax1 = axes('Position',[0.11 0.11 0.75 0.75]);
plot(x1, y11, 'r');
hold on
grid on
plot(x1, y12, 'k');
axis([0 5 -1 1.8]);
legend('sin(x)', 'cos(x)');
xlabel('x')
ylabel('y-label');
%ax1 = gca;
ax1_pos = get(ax1,'Position');
ax2 = axes('Position', ax1_pos,...
'XAxisLocation', 'top',...
'YAxisLocation', 'right',...
'Color', 'none');
set(ax2,'YColor','w');
%// Notice the Latex formatting to print the exponent
title('2^{nd} Harmonics');
line(x2,0,'Parent',ax2,'Color','k')
xlabel('n');
Then you can resize as you wish; the title stays visible.
I am plotting two maps next to each other using subplot. However, now, the image is turning out like this:
Is there any way to make the map part of the image larger? I would like to plot the maps side by side, by in this image, the resolution is low and the size is small.
%% Graph one site at a time
nFrames = 6240; % Number of frames.
for k = 94:nFrames
h11 = subplot(1,2,1); % PM2.5
% Map of conterminous US
ax = figure(1);
set(ax, 'visible', 'off', 'units','normalized','outerposition',[0 0 1 1]);
ax = usamap('conus');
set(ax,'Position',get(h11,'Position'));
delete(h11);
states = shaperead('usastatelo', 'UseGeoCoords', true,...
'Selector',...
{#(name) ~any(strcmp(name,{'Alaska','Hawaii'})), 'Name'});
faceColors = makesymbolspec('Polygon',...
{'INDEX', [1 numel(states)], 'FaceColor', 'none'}); % NOTE - colors are random
geoshow(ax, states, 'DisplayType', 'polygon', ...
'SymbolSpec', faceColors)
framem off; gridm off; mlabel off; plabel off
hold on
% Plot data
scatterm(ax,str2double(Lat_PM25{k})', str2double(Lon_PM25{k})', 25, str2double(data_PM25{k})', 'filled');
% Colorbar
caxis([5 30]);
h = colorbar;
ylabel(h,'ug/m3');
% Title
title(['PM2.5 24-hr Concentration ', datestr(cell2mat(date_PM25(k)), 'mmm dd yyyy')]);
%%%%
h22 = subplot(1,2,2); % O3
% Map of conterminous US
ax2 = usamap('conus');
set(ax2,'Position',get(h22,'Position'));
delete(h22);
states = shaperead('usastatelo', 'UseGeoCoords', true,...
'Selector',...
{#(name) ~any(strcmp(name,{'Alaska','Hawaii'})), 'Name'});
faceColors = makesymbolspec('Polygon',...
{'INDEX', [1 numel(states)], 'FaceColor', 'none'}); % NOTE - colors are random
geoshow(ax2, states, 'DisplayType', 'polygon', ...
'SymbolSpec', faceColors)
framem off; gridm off; mlabel off; plabel off
hold on
% Plot data
scatterm(ax2,str2double(Lat_O3{k})', str2double(Lon_O3{k})', 25, str2double(data_O3{k})'*1000, 'filled');
hold on
% Colorbar
caxis([10 90]);
h = colorbar;
ylabel(h,'ppb');
% Title
title(['O3 MDA8 Concentration ', datestr(cell2mat(date_O3(k)), 'mmm dd yyyy')]); % Title changes every daytitle(str);
% Capture the frame
mov(k) = getframe(gcf); % Makes figure window pop up
% Save as jpg
eval(['print -djpeg map_US_' datestr(cell2mat(date_PM25(k)),'yyyy_mm_dd') '_PM25_24hr_O3_MDA8.jpg']);
clf
end
close(gcf)
To change the amount of space the data occupies in the figure, you can use this command:
set(gca,'Position',[0.1 .1 0.75 0.85])
You'll have to play with the numbers a bit, to get things look nice. Note that Matlab rescales everything when you resize the figure window, so the optimal numbers depend on the window size you want to use.
On the other hand, you want to make the map bigger in comparison to the colorbar. You cannot make it without changing your window size, because your maps are already as high as the color bars. I would suggest to:
Set caxis to the same range in both plots.
Remove the colorbar on the left one.
Increase the height of your figure window to make the maps occupy as much width as possible.
Put the two images nicelye side by side using the command above.
For more information, see Matlab Documentation on Axes Properties.
Example:
% Default dimenstions
figure
x = 1:.1:4;
y = x;
[X, Y] = meshgrid(x,y);
subplot(1,2,1)
h = pcolor(X, Y, sin(X).*cos(Y)*2);
set(h, 'EdgeAlpha', 0);
axis square
colorbar
subplot(1,2,2)
h = pcolor(X, Y, sin(Y).*cos(X));
set(h, 'EdgeAlpha', 0);
axis square
colorbar
% adjust dimensions
subplot(1,2,1)
set(gca, 'Position', [0.1 0.1 0.3 0.85])
subplot(1,2,2)
set(gca, 'Position', [0.55 0.1 0.3 0.85])
This blog post has many great examples of FileExchange scripts dealing with size of subplots.
subplot_tight works very well and makes the subplots larger. Instead of writing in subplot(1,2,1), use subplot_tight(1,2,1)
My problem was similar -> scaling subplots in a figure a bit more up. Important for me though, was to maintain the aspect ratio that I've set before.
Enhancing the answer from #texnic in order to not have to set the values manually, one might use the following:
scale = 1.1; % Subplot scale
subplot(1,2,1)
% Your plotting here ...
pos = get(gca, 'Position'); % Get positions of the subplot [left bottom width height]
set(gca, 'Position', [pos(1) pos(2) pos(3)*scale pos(4)*scale]); % Scale width and height
Understanding this, one can also easily implement a parametric move of the subplot.
How to plot something outside the axis with MATLAB? I had like to plot something similar to this figure;
Thank you.
Here is one possible trick by using two axes:
%# plot data as usual
x = randn(1000,1);
[count bin] = hist(x,50);
figure, bar(bin,count,'hist')
hAx1 = gca;
%# create a second axis as copy of first (without its content),
%# reduce its size, and set limits accordingly
hAx2 = copyobj(hAx1,gcf);
set(hAx2, 'Position',get(hAx1,'Position').*[1 1 1 0.9], ...
'XLimMode','manual', 'YLimMode','manual', ...
'YLim',get(hAx1,'YLim').*[1 0.9])
delete(get(hAx2,'Children'))
%# hide first axis, and adjust Z-order
axis(hAx1,'off')
uistack(hAx1,'top')
%# add title and labels
title(hAx2,'Title')
xlabel(hAx2, 'Frequency'), ylabel(hAx2, 'Mag')
and here is the plot before and after:
You can display one axis with the scale you want, then plot your data on another axis which is invisible and large enough to hold the data you need:
f = figure;
% some fake data
x = 0:20;
y = 23-x;
a_max = 20;
b_max = 23;
a_height = .7;
%% axes you'll see
a = axes('Position', [.1 .1 .8 a_height]);
xlim([0 20]);
ylim([0 20]);
%% axes you'll use
scale = b_max/a_max;
a2 = axes('Position', [.1 .1 .8 scale*a_height]);
p = plot(x, y);
xlim([0 20]);
ylim([0 b_max]);
set(a2, 'Color', 'none', 'Visible', 'off');
I had similar problem and I've solved it thanks to this answer. In case of bar series the code is as follows:
[a,b] = hist(randn(1000,1)); % generate random data and histogram
h = bar(b,a); % plot bar series
ylim([0 70]) % set limits
set(get(h,'children'),'clipping','off')% turn off clippings
with help of the community in this thread: Minor grid with solid lines & grey-color
I got it to work to set minor grid lines as solid and coloured style. But when adding a second y-axes it just messes up the y-ticks on the right axis! heres the example code:
x = linspace(0, 10, 11);
y1 = x.^3+1;
y2 = x+1;
y3 = y1./y2+5;
% plotte: http://www.mathworks.com/help/techdoc/ref/linespec.html
myfig = figure('Position', [500 500 445 356]); %[left, bottom, width, height]:
ax1 = axes('Position',[0.13 0.18 0.75 0.75]);
hold on
p1 = plot(x,y1,'x--r');
p2 = plot(x,y2,'*-b');
xlim([0 max(x)]);
ylim([0 max([max(y1) max(y2)])]);
col=.85*[1 1 1];
%# create a second transparent axis, same position/extents, same ticks and labels
ax2 = axes('Position',get(ax1,'Position'), ...
'Color','none', 'Box','on', ...
'XTickLabel',get(ax1,'XTickLabel'), 'YTickLabel',get(ax1,'YTickLabel'), ...
'XTick',get(ax1,'XTick'), 'YTick',get(ax1,'YTick'), ...
'XLim',get(ax1,'XLim'), 'YLim',get(ax1,'YLim'));
%# show grid-lines of first axis, give them desired color, but hide text labels
set(ax1, 'XColor',col, 'YColor',col, ...
'XMinorGrid','on', 'YMinorGrid','on', ...
'MinorGridLineStyle','-', ...
'XTickLabel',[], 'YTickLabel',[]);
%# link the two axes to share the same limits on pan/zoom
linkaxes([ax1 ax2],'xy');
ax3 = axes('Position',get(ax1,'Position'),...
'XAxisLocation','top',...
'YAxisLocation','right',...
'Color','none',...
'XTickLabel', [],...
'XColor','k','YColor','k');
%# link the two axes to share the same limits on pan/zoom
linkaxes([ax1 ax2 ax3], 'x');
ylabel(ax3, 'Speedup []');
ylim(ax3, [0 max(y3)]);
hold on
p3 = plot(x,y3,'s-.m','Parent',ax3);
hleg = legend([p1 p2 p3], {'CPU', 'GPU', 'Speedup'}, 'Location', 'NorthWest');
xlabel(ax2, 'N_{Funcs}');
ylabel(ax2, 't [s]');
set(hleg, 'FontAngle', 'italic')
and how it looks like:
Its simpler than you think: when you create the second axis ax2, set the 'Box' property to 'off' instead of 'on'.
Even more, you can simplify that part and create it as:
ax2 = copyobj(ax1,myfig);
delete( get(ax2,'Children') )
set(ax2, 'Color','none', 'Box','off')
The 2nd y-axis is "messed up" because the automatically generated YTick from y3 does not agree with the YTick from y1 and y2.
If this view is final (meaning you don't have to zoom in/zoom out or move the plot), you can manually define the YTick of ax3 to match those of ax1
ax3 = axes('Position',get(ax1,'Position'),...
'XAxisLocation','top',...
'YAxisLocation','right',...
'Color','none',...
'XTickLabel', [],...
'YTick', [0:max(y3)/5:max(y3)], ... %% Define 6 YTick (including 0) like ax1
'XColor','k','YColor','k');