Until now i had only 1 axis in my GUI to I used to just plot directly using plot command. Plus i need to plot these in a loop.
for i = 1:length(sig)
plot(sig(i).time,sig(i).signal,sig(i).time,updated(i).filter,)
hold on
end
Now i have 2 axes in my GUI, how can I make a certain plot appear in 1st axis and another in my 2nd axis
Now for example i need to plot the below in the 2nd axis
for i = 1:length(sig)
plot(sig(i).time,sig(i).fil,sig(i).time,updated(i).sig,)
hold on
end
Any help will be appriciated
You could specify the axes for hold and plot functions. Considering you have two axes, h1 and h2 inside your figure, you could do the following:
hold(h1, 'on')
hold(h2, 'on')
for i = 1:length(sig)
plot(h1, sig(i).time,sig(i).signal,sig(i).time,updated(i).filter)
plot(h2, sig(i).time,sig(i).fil,sig(i).time,updated(i).sig)
end
Related
I have graphed a Bode plot for my transfer function, and I was wondering if there is some way to insert either horizontal or vertical lines to show a specific value for the gain/phase angle or frequency?
I have found with the following code I can draw a horizontal line on the phase angle graph:
x = linspace(10^-1,10^2,100);
for bleh = 1:length(x)
y(bleh) = -30.9638;
end
bode(num, den)
hold on
plot(x,y)
But this does not seem to apply in the gain graph, nor does my limited knowledge (and only way that makes sense to me) of vertical lines. I tried:
y1 = get(gca,'ylim');
w1 = 1.2;
bode(num, den)
hold on
plot(x,y,[w1 w1],y1)
But I only get the one horizontal line as was done from the above code.
Is this a possibility?
(Using R2017a, if that matters.)
I'm not sure I've understood you question, nevertheless, I propose the following.
When there are more one axes in a figure, as it is the case of the bode diagram, if you want to add something in a specific axes (or in all) you have to specify, in the call to plot the handle of the axes.
So, to add lines in the bode diagram, you have first to identify the handles of the two axes: you can do it in, at least two way:
using the findobj function: ax=findobj(gcf,'type','axes')
extract them as the Children of the figure: ax=get(gcf,'children')
Once you have the handles of the axes, you can get their XLim and YLim that you can use to limit the extent of the line you want to add.
In the following example, I've used the above proposed approach to add two lines in each graph.
The horizontal and vertical lines are added in the middle point of the X and Y axes (problably this point does not have a relevant meaning, but it is ... just an example).
% Define a transfer function
H = tf([1 0.1 7.5],[1 0.12 9 0 0]);
% PLot the bode diagram
bode(H)
% Get the handles of the axes
ax=findobj(gcf,'type','axes')
phase_ax=ax(1)
mag_ax=ax(2)
% Get the X axis limits (it is the same for both the plot
ax_xlim=phase_ax.XLim
% Get the Y axis limits
phase_ylim=phase_ax.YLim
mag_ylim=mag_ax.YLim
%
% Define some points to be used in the plot
% middle point of the X and Y axes of the two plots
%
mid_x=(ax_xlim(1)+ax_xlim(2))/2
mid_phase_y=(phase_ylim(1)+phase_ylim(2))/2
mid_mag_y=(mag_ylim(1)+mag_ylim(2))/2
% Set hold to on to add the line
hold(phase_ax,'on')
% Add a vertical line in the Phase plot
plot(phase_ax,[mid_x mid_x],[phase_ylim(1) phase_ylim(2)])
% Add an horizontal line in the Phase plot
plot(phase_ax,[ax_xlim(1), ax_xlim(2)],[mid_phase_y mid_phase_y])
% Set hold to on to add the line
hold(mag_ax,'on')
% Add a vertical line in the Magnitide plot
plot(mag_ax,[mid_x mid_x],[mag_ylim(1) mag_ylim(2)])
% Add an Horizontal line in the Magnitide plot
plot(mag_ax,[ax_xlim(1), ax_xlim(2)],[mid_mag_y mid_mag_y])
Hope this helps,
Qapla'
I'm always see this kind of graph in XRD plot:
and i'm wondering how they do that?, if you have different XRD plot and assuming having the same y axis, can matlab do this? thanks.
Here is a way to do it.You can customize it as you want, but this should hopefully get you going.
First create an axes and change its position/size inside the figure, shifting it upward to make room for the 2nd axes as well as removing the x and y labels that you don't want. Then create a 2nd axes with specified position/size to make it fit below the 1st one.
Sample code:
clear
clc
%// Generate dummy data
x = 1:2:100;
y1 = rand(1,numel(x));
figure;
%// Make an axes and set its position
haxes1 = axes('Position',[.1 .1 .8 .7],'Color',[1 1 1])
%// Plot 1st curve
plot(x,y1,'Parent',haxes1)
%// Remove box and labels
box off
set(gca,'XTickLabel','','XTick',[],'YTick',[])
hold on
%// Get current axes position. You set it so you could get the parameters
%// directly as well.
axes1Pos = get(gca,'Position');
%// Shift 1st axes upward
set(gca,'Position',[axes1Pos(1) 2.6*axes1Pos(2) axes1Pos(3) axes1Pos(4)])
%// Change the poisition/size of the 2nd axes to fit below the 1st one
haxes2 = axes('Position',[axes1Pos(1) axes1Pos(2)/2.5 axes1Pos(3) axes1Pos(4)/2.5]) ;
%// Use linspace to generate colored points to use with scatter.
c = linspace(1,10,length(x));
%// Add 2nd plot and keep only x label
scatter(x,rand(1,numel(x)),40,c,'filled')
set(gca,'YTick',[])
box off
%// Place a ylabel for both axes
text(-4, 1.7,'Super nice y label','rotation',90,'FontSize',16,'HorizontalAlignment','center')
Sample output:
There are other ways to do this as well.
Hope that helps!
I have a figure in which I plot some disperse points and then a trajectory. I want to switch between different trajectories by plotting them in the same figure as the points, but without creating new figures, i.e., "erasing" the first trajectory and then plotting the new one.
Is there a way of doing this?
Perhaps this little demo will be helpful:
xy = rand(20,2);
figure
% Plot first iteration and output handles to each
h = plot(xy(:,1),xy(:,2),'b.',xy(1:2,1),xy(1:2,2),'r-');
axis([0 1 0 1])
% Update second plot by setting the XData and YData properties of the handle
for i = 2:size(xy,1)-1
set(h(2),{'XData','YData'},{xy(i:i+1,1),xy(i:i+1,2)})
drawnow
pause(0.1);
end
You should read up on handle graphics in Matlab and the get and set functions.
I'm currently developing a GUI (programatically. No GUIDE has been used) for a project and I need to place 11 axes on the same GUI. I'm using the axes command to get the handles of the 11 controls:
h.AXES_ALL(1)=axes('parent',h.fig,'position',[L1 T W H]);
h.AXES_ALL(2)=axes('parent',h.fig,'position',[L2 T W H]);
h.AXES_ALL(3)=axes('parent',h.fig,'position',[L3 T W H]);
...
They all have the same dimensions and I'm using the for instruction to plot the data:
for i=1:11
set(h.PLOT(i),'parent',h.AXES_ALL(i),'XData',x_data,'YData',y_data);
end
But the problem is that the last plot (the 11th) is the one that is shown on the axes control (the 11th) and all the other axes are empty. My objective is to plot 11 curves on 11 different axes controls. They aren't located in the same position, just for the record.
THanks in advance!
Charlie
You said in your comment that you start with a single axes handle:
ha = axes;
And you try to create two plots with the same parent axes, but it does not work as you intended:
>> h.PLOT(1:2) = plot(ha,0,0)
h.PLOT =
195.0035 195.0035
That just replicated the same plot series handle. So, when you go to set the plot data and parent axes for each plot, you are just moving the plot from axes to axes, updating the data while you go.
Use the plot command in a loop, using the appropriate axes handle for each plot:
for ip=1:11,
h.PLOT_ALL(ip) = plot(h.AXES_ALL(ip),...);
end
Then when you update the plot's XData and YData as you want to do, you do not have to change the parent axes.
All the three variables I am using to plot are matrix of size 1x1x100. I am using this code line to plot:
hold on;
for i=1:100
plot3(R_L(:,:,i),N_Pc(:,:,i),CO2_molefraction_top_of_window(:,:,i),'o');
xlabel('R_L');
ylabel('N_P_c');
zlabel('CO_2')
end
However, I am not getting the third axis, and hence the third variable CO2_molefraction_top_of_window on the plot. May I know where am I wrong?
Besides the above question, but on the same subject, I want to know if there is any option where I can plot 4 dimensional plot just like the 3 dimensional plot which can be drawn using plot3?
So I had the same problem when using plot3. For some reason, using the hold on command "flattens" the plot. I'm not sure why, but I suspect it has something to do with the operation hold on performs on the plot.
Edit: To clarify, the 3d plot is still there, but the perspective has been forced to change. If you use the "rotate 3D" tool (the one with an arrow around a cube), you can see the graph is 3d, the default perspective is just straight on so only two axes are visible and it appears flat.
Just a note --- you only need to do the xlabel ylabel zlabel commands once (outside the loop).
Also:
is there any reason your matrices are 1x1x100 instead of just 100x1 or 1x100?
Because if you reshape them to 2D you can just do the plotting in one hit.
What do you mean by "missing third axis"? When I run your code (or as close as I can get, since you didn't provide a reproducible example), I do get a 3rd axis:
.
X = rand(1,1,100); % 1x1x100 X matrix
Y = rand(1,1,100); % 1x1x100 Y matrix
Z = rand(1,1,100); % 1x1x100 Z matrix
% Now, we could do a for loop and plot X(:,:,i), Y(:,:,i), Z(:,:,i),
% OR we can just convert the matrix to a vector (since it's 1x1x100 anyway)
% and do the plotting in one go using 'squeeze' (see 'help squeeze').
% squeeze(X) converts it from 1x1x100 (3D matrix) to 100x1 (vector):
plot3(squeeze(X),squeeze(Y),squeeze(Z),'o')
xlabel('x')
ylabel('y')
zlabel('z')
This gives the following, in which you can clearly see three axes:
If it's the gridlines that you want to make the graph look "more 3D", then try grid on (which is in the examples in the Matlab help file for plot3, try help plot3 from the Matlab prompt):
grid on
You will have to clarify "missing third axis" a bit more.
I came across a similar problem and as #Drofdarb's the hold on seems to flatten out one axis. Here is a snippet of my code, hope this helps.
for iter = 1:num_iters:
% hold on;
grid on;
plot3(tita0,tita1, num_iters,'o')
title('Tita0, Tita1')
xlabel('Tita0')
ylabel('Tita1')
zlabel('Iterations')
hold on; % <---- Place here
drawnow
end
As opposed to:
for iter = 1:num_iters:
grid on;
hold on; % <---- Not here
plot3(tita0,tita1, num_iters,'o')
title('Tita0, Tita1')
xlabel('Tita0')
ylabel('Tita1')
zlabel('Iterations')
% hold on;
drawnow
end