How to scatter plot using different colors by using own RGB data?

I`m using Matlab App Designer to create a scatter plot and I want to use my own rgb data for the colors but I think my code is wrong somewhere.

            Style = app.SelectedStyles;
            Colors = app.SelectedColors;
            
            % Start with a fresh plot
            cla(app.UIAxes)
            hold(app.UIAxes,'on')
             
            % Select relevant segment of data
            xdata = app.Data.a;
            ydata = app.Data.b;
            cdata = app.Data.c;
            %cdata = app.Data.c;
            % Filter the data according to the controls
            filterData(app);
            

            % Build a scatter plot for each selected style
            for ii = 1:length(Style)
             selectedstyles = ((app.Data.styles == Style(ii)) & (app.displayedIndices));
             selectedcolors = ((app.Data.c == Colors(ii)) & (app.displayedIndices));
             
             scatter(app.UIAxes,xdata((selectedstyles)),ydata(selectedstyles),cdata(selectedcolors),'filled','s');
            end
            annotateScatterPlot(app)
                    
            % Update the table to show only the data that satisfies the controls
            app.UITable.Data = app.Data(app.displayedIndices,:);
            drawnow;
            
            % List which styles and colors to use
            Style = [];
            Colors = [];

            if app.JapaneseCheckBox.Value
                Style = "japanese";
                Colors = [];
            end
            if app.AfricanCheckBox.Value
                Style = [Style "African"];
                Colors = [];
            end

            app.SelectedStyles = Style;
            app.SelectedColors = Colors;
            
            refreshplot(app)

Answer 1

[Cris LaPierre]

Color is the 4th input to scatter.

scatter(x,y,sz,c)

You have placed it in the 3rd spot, which is for size. What happens if you try this?

scatter(app.UIAxes,xdata((selectedstyles)),ydata(selectedstyles),[],cdata(selectedcolors),'filled','s');

[義典 鈴木]

Thank you for the reply. I already tried this but nothing changes. I guess there is something wrong in the code I wrote in the app

Answer 2

[Image Analyst]

If you use the built-in colorcloud() function, does that do what you want? (Ignore the red junk after the image).

img = imread('peppers.png');
colorcloud(img)

Error using uicontrol
This functionality is not available on remote platforms.

Error in rotate3d>localCreateAzElIndicator (line 478)
rdata.ModeStateData.textBoxText = uicontrol('Parent',hFig,'Units','Pixels',...

Error in rotate3d>localDoRotateOn (line 508)
localCreateAzElIndicator(rdata)

Error in rotate3d>@(~,~)localDoRotateOn(rdata) (line 393)
set(rdata,'ModeStartFcn',@(~,~)localDoRotateOn(rdata));

Error in hgfeval (line 62)
feval(fcn{1},varargin{:},fcn{2:end});

Error in matlab.uitools.internal.uimode/modeControl (line 16)
hgfeval(hThis.ModeStartFcn);

Error in matlab.uitools.internal.uimode/set.Enable (line 167)
obj.Enable = modeControl(obj,value);

Error in matlab.uitools.internal.uimodemanager>localSetMode (line 200)
set(newMode,'Enable','on');

Error in matlab.uitools.internal.uimodemanager/set.CurrentMode (line 119)
obj.CurrentMode = localSetMode(obj,value);

Error in activateuimode (line 30)
set(hManager,'CurrentMode',hMode);

Error in rotate3d>setState (line 363)
activateuimode(fig,'Exploration.Rotate3d');

Error in rotate3d (line 262)
setState(hTarget,arg2,rotatestyle)

Error in colorcloud>setAxesProperties (line 205)
rotate3d(hAx,'on');

Error in colorcloud (line 121)
setAxesProperties(hPanel,hAx,options);

[義典 鈴木]

Thank you. I am actually doing color analysis and I want to plot the main color in the a-b graph. I want to plot the coordinates with the color responding to the analysis. For example,

a =[2,3,6,3,6,9]

b =[1,5,6,7,5,4]

c =[0.1 0.4 0.5

0.4 0.6 0.8

0.5 0.8 0.2

0.3 0.1 0.6

0.7 0.8 0.9

0.5 0.3 0.3

]

but the problem is I am using app designer and I use mat file to store the data

[Image Analyst]

I'm not sure I understand the problem. Can you upload your files?