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

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義典 鈴木
義典 鈴木 2021-11-9
评论： Image Analyst 2021-12-16
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)

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回答（2 个）

Cris LaPierre
Cris LaPierre 2021-11-10
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');
  1 个评论
義典 鈴木
義典 鈴木 2021-12-16
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

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Image Analyst
Image Analyst 2021-11-11
Ran in:
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);
  2 个评论
義典 鈴木
義典 鈴木 2021-12-16
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

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