I am plotting two plotpc charts (i want to see decision boundaries from perceptron and from Bayesian net) and I need them to have different color.
plotpv(P,T);
hold all;
plotpc(net.IW{1,1},0,'r');
plotpc([w1(maxind(1)), w2(maxind(2))],0,'g');
title('Decision boundaries');
However all my trials ended up with failure and I always get same colors like this:
Thank you for help.
You need to assign the output of plotpc (line handle) to some variable, which you can then use to alter line appearance, e.g.
hPlot = plotpc(net.IW{1,1},0);
set(hPlot, 'Color', 'r');
Also, I don't think plotpc accepts a color as a third argument - you should get a warning when you do that.
Related
How can I have diferent markers or line styles when I am plotting same variable from 8 diferent data files in one figure?
I have got my code that reads multiple excel files and it is perfectly fine with plotting the variable I call for from all 8 diferent excel files.
Although I already have the plot with different colors that I have defined. However, somehow, I cannot define any marker or diferent Line Styles. I have attached my plotting codes below; please also see the figure
ax = gca;
grid on;
hold on
plot(Pin_dBm,Pout_Meas_dbm,"LineWidth",2)
%ax.LineStyleOrder={'-o','-+','-*','-x','-s','-d','-v','->'};
ax.ColorOrder=[1 0 0; 1 0 1; 0 1 0; 0.4660 0.6740 0.1880; 0 0 1; 0.3010 0.7450 0.9330; 0.8500 0.3250 0.0980; 0.9290 0.6940 0.1250]
ylabel('Output Power [dBm]','Color','K')
xlabel('Input Power [dBm]')
title('Output Power comparison - ON mode (0V)', 'Color', 'k')
legend('3F50Sa1','3F100Sa1', '5F50Sa1','5F100Sa1','7F50Sa1','7F100Sa1','9F50Sa1','9F100Sa1','location', 'bestoutside')
To change trace (or marker) properties you have to use the plot handle, not the figure handle, to change line properties like LineWidth and Color.
To grab the plot handle you have to plot like this
hf1=figure(1)
ax = gca;
grid on;
hp1=plot(Pin_dBm,Pout_Meas_dbm)
hp1.LineWidth=2
hp1.Color='r' % red
..
hf1 is the figure handle, not the trace or curve or graph handle.
The figure is the frame containing traces.
You don't have to, this is ok
hf1=figure
but it's good practice to number figures figure(n) as soon as generated, it helps reading code if later on someone has to findout what figure handle belongs to what figure.
now you tell the graph container, the figure with handle hf1 not to remove the 1st trace regardless of what you plot next:
hold(ax1,'on')
and now, with a for loop or one by one, or in any other way you choose, you can add more traces onto same figures changing the properties you choose using a different plot handle
hp2=plot(Pin_dBm2,Pout_Meas_dbm2)
hp2.LineWidth=1.5
hp1.Color='b' % blue
..
and as you mention in your question you can send the same variable updated with different input data or file
update_Pin_dBm;
update_Pout_Meas_dbm;
If you do not update Pin_dBm and-or Pout_Meas_dbm the next plot with different properties may be identical or similar and overlap the previous trace.
hp3=plot(Pin_dBm,Pout_Meas_dbm)
hp3.LineWidth=1
hp1.Color=[0 1 1] % cyan
The figure handle hf1 could still be used to change trace properties, because as the container to the plot, has as children property the handle to the plot. But no one uses what is otherwise a rather long Java-like expression
Note: The term marker is generally used, not for the graph line, the plot, but for the pointers on the graph line that scopes and also MATLAB allows to put, to read a particular (x,y).
If you find this answer useful, would you please be so kind to accept it?
Thanks for reading my answer.
MATLAB legends list everything in a plot, including guidelines that you have put on a plot.
A fudge to get around that is to do
*Plot
*Add legend
*Add guidelines
However, MATLAB puts the most recent lines in the front, meaning the guidelines then sit over the displayed data; ugly and distracting.
Similar problems occur any time you build up a complicated plot, legend freaks out and grabs everything, and workarounds with plotting order can be ugly
Example code:
%**** Optional guidelines
figure(1)
plot([2 2],[0,1],'k--'); hold on
%**** DATA
N = 4;
y=rand(5,N);
x=1:1:5;
for plotLoop=1:N;
%* Plot
figure(1)
plot(x,y(plotLoop,:));
hold on
end
%*****LEGEND
hLegend = legend(LegTxt,...
'interpreter','latex',...
'location','eastoutside')
(move the code block order to replicate the situations mentioned above)
How to reasonably fix this?
If you want a certain graphics object to not produce a legend (and that will work even if you toggle the legend off and on again), you can modify the LegendInformation:
%# plot something that shouldn't show up as legend
handleWithoutLegend = plot(something);
%# modify the LegendInformation of the Annotation-Property of the graphical object
set(get(get(handleWithoutLegend,'Annotation'),'LegendInformation'),...
'IconDisplayStyle','off');
%# toggle legend on and off at will, and never see the something-object appear
If you try to turn off the legend on an array of handles, the best way is just to loop over them, with a try-wrapper for graphical objects that cannot produce a legend:
for h = listOfHandles(:)'
try
set(get(get(h,'Annotation'),'LegendInformation'),...
'IconDisplayStyle','off');
end
end
Craft a custom handle that you feed into the legend. Plot handles can be concatenated to form an object that legend is happy to accept as input.
The required code isn't pretty, but it does work.
%**** Optional guidelines for periodicity
figure(1)
plot([2 2],[0,1],'k--'); hold on
%**** DATA
N = 4;
y=rand(5,N);
x=1:1:5;
for plotLoop=1:N;
LegTxt{plotLoop} = num2str(plotLoop);
%* Plot
figure(1)
% if statement to construct a handle for the legend later
if plotLoop==1
htot=plot(x,y(plotLoop,:));
else
h=plot(x,y(plotLoop,:));
% Append this info to the figure handle
htot= [htot, h];
end
hold on
end
%*****LEGEND
hLegend = legend(htot,LegTxt,...
'interpreter','latex','FontSize',16,...
'location','eastoutside')
For the pedantic or curious, the loop for plotLoop=1:N; is here because I extracted the example from some rather complex code where the data is extracted from cell arrays. Obviously you could eliminate that loop for a lot of usage scenarios, I just decided to keep the code in its most flexible format!
You can also hide plot from legend in another way. Here's the sample:
figure(1)
hold on
x=1:10;
y1=x;
y2=x.^2/10;
y3=x.^3/100;
plot(x,y1);
plot(x,y2,'HandleVisibility','off');
plot(x,y3);
legend('x','x^3')
You just need to put 'HandleVisibility', 'off' to your plot that you don't want to show up in legend. That's how result looks like:
HandleVisibility is a line property so it might now work if you create plot in some other way. But for most use cases its enough and it is much simpler.
I'm trying to combine a few Matlab plots into one figure and therefore I'm wondering how I can create 'normal' tiles above my plots instead of the bold titles provided by Matlab. Below an example.
figure
plot((1:10).^2)
title({'First line';'Second line'})
Make use of the 'FontWeight' argument:
figure
plot((1:10).^2)
title({'First line';'Second line'},'FontWeight','Normal')
Note also that you can access the 'FontWeight' argument for all text objects in your figure in one go---in case you have, e.g., several subplots in your figure---using findall:
myFig = figure;
subplot(2,1,1)
plot((1:10).^2)
title('First plot')
subplot(2,1,2)
plot((1:10).^2)
title('Second plot')
% Set 'Normal' font weight in both titles above
set(findall(myFig, 'Type', 'Text'),'FontWeight', 'Normal')
As stated in the comments above; for a single figure title, you can make use make use of \rm as an alternative. Note however that \rm depends on the (default) choice of 'Interpreter' as 'tex', whereas the approach above is valid for all choices of interpreter (however with no effect for text objects using interpreter 'latex').
I have a question regarding Matlab's function gplot. I would like to call gplot several times in a for-loop to plot several graphs/paths in the same figure.
However, I would like to use more colors than standardly available. With the ordinary plot command this can, for example, be done in the following way:
plot([1 2],[3 4],'Color',[rand rand rand])
but this seems not possible within gplot. Does anyone know how to do this. My code is currently:
col=char('r', 'g', 'm', 'y','r', 'g', 'm', 'y')
hold all
for i=1:k
gplot(Cell_Matrix{i},coordinates,col(i))
end
hold off
So now I have repeated using the same color (excluding some I do not want), but I would like to add way more new colors (around 25 extra).
Not the cleanest solution, but you could manipulate Matlab's default plotting order. So before your existing code, call:
figure;
colors = get(gca,'ColorOrder');
colors now contains the color data for Matlab's default color cycle when using hold all. You should be able to delete and add rows of RGB values to this matrix.
For example, to just use k random colors:
colors = rand(k, 3);
Once this matrix is set to your satisfaction, just replace the color order in your current axes with:
set(gca,'ColorOrder',colors)
Then execute a modified version of the remainder of your posted code:
hold all;
for i=1:k
gplot(Cell_Matrix{i},coordinates)
end
I have a 2D space in which a function value is defined (you can think of it as a manifold). Now I plotted the function value using contourf and changed the colormap to something softer than jet. So far it looks quite good.
Now I want to draw a line representing the state over time in my space. That is also possible using the the plot command. But I want some more improvements: There is an additional state that is hidden for now (value 0...50). I would like the line color to change according to this hidden state. So in a sense to apply a separate colormap to the line plotted by plot like for example in a waterfall plot.
Is this (or something similar) possible using matlab?
Thanks
If you want to either use interpolated shading or have the colours change with the colour map, then you want to plot your data as a mesh and set the edgecolor property appropriately. Note that in order to plot it as a mesh, then you will need to duplicate it so that it has a size of at least 2 in each direction.
h = mesh([X(:) X(:)], [Y(:) Y(:)], [Z(:) Z(:)], [C(:) C(:)], ...
'EdgeColor', 'interp', 'FaceColor', 'none');
You may also want to look at the MeshStyle property, if you want to plot multiple lines simultaneously.
This solution is also much nicer than the one used in cline because it only creates one graphics object, rather than n.
Have a look into the cline.m function from file exchange, I think it is exactly what you need.
I can recommend the Colored line entry from the file exchange. It has good feedback and uses the color map to define the displayed colours, I've use it sucessfully on a number of projects.