choose coulor of plot

Hey Guys, I want to give the User of my PlotingProgram the option to choose the color of the plot lines. I would be really happy about some ideas or tips.

My current Thought is:

-Creating a pie plot

-using different coulors for each segment of the plot

-the user click in one segment of the plot

-regarding to the Coordinates of the click the program selects the coulor

[Patrik Ek]

What have you attempted? This is a quite long request. You will need to create a gui for this. Check out guide and/or callback functions.

This is something I put together fast some time ago:

function myCallback(hObject,eventdata)

c = 'krym';
n = randi([1,4],1);
ch = get(gca,'Children');
set(ch,'Color',c(n));

Apply this callback some standard plot like plot(1:10,'LineW',2,'ButtonDownFcn',@myCallback);. The function randomly selects a color from c. This could work as inspiration.

[Geoff Hayes]

See also uisetcolor which, when run, will launch a dialog for selecting colours.

Answer 1

[Max Müller]

i got it....and somehow i can accept my own answer

[Geoff Hayes]

Max - could you perhaps include a description of the solution/answer so that others (when viewing your posted question) can get an idea of how you went about solving this problem?

[Max Müller]

The Code is too long....i did this for 26 Colors. I have created a Button that changes its BackGroundColor on click. So u chose ur Color. But 1st i created an Array holding 26 Colors via RGB-system.

% Coulors you can chose(3 as example/all rgb-system (red/green/blue))
RedAmount =   [0,0,1]
GreenAmount = [0,1,1]
BlueAmount =  [1,1,0]
ArrayOfCoulors = [RedAmount;GreenAmount;BlueAmount];
ArrayOfCoulors = ArrayOfCoulors';
setappdata(handles.CompareMultipleShots,'ArrayOfCoulors',ArrayOfCoulors);

%%ChoseCoulor 
function CoulorOneButton_Callback(hObject, eventdata, handles)
  ArrayOfCoulors = getappdata(handles.CompareMultipleShots,'ArrayOfCoulors');
           Counter = getappdata(hObject,'Counter');

             if  isempty(Counter)|Counter == 26;
                 Counter = 0;
                 setappdata(hObject,'Counter',Counter);
             end

             Counter = Counter + 1;
             Coulor = ArrayOfCoulors(Counter,:);

             set(hObject,'BackgroundColor',[Coulor]);
             setappdata(hObject,'Counter',Counter);
             setappdata(handles.CompareMultipleShots,'LineCoulorUsedAmp',Coulor)

Color goes to my Plotfunction....

plot(x,y,'Color',[Color])           %as example

Answer 2

[Salaheddin Hosseinzadeh]

Hi Max,

Sorry I'm a bit lazy to actually write a code, but I'm sure you can do it, and you can do it the you want it.

I read your question and they way I would do this is to use

[x,y] = ginput(n)

to let the user click on n segments, or you may do it one by one, then I would normalize the x and y values in respect to their max and min allowed values, so x and y end up being between 0 and 1, and I would use normalized x and y for a new color, [x y 1]

So you would never end up having the same color.

Answer 3

[Max Müller]

This questions is all about ideas.....I dont want codes or u guys to work for me. I just want some hints and ideas. I am tankful for all ur help but just collect ideas.