Is it possible to change specific markers in the same data set on a probplot?

Hi,

I have a data set of 1024 data points. I would like to plot 3 of these points as a different colour and/or marker. Is this possible on a probplot?

I have tried this:

colorarray = cell(1024,1);
facecolorarray=cell(1024,1);
markertypearray = cell(1024,1);

a =  false(1024,1);
b = [290 583 857];

GBIds(b) = 1;
colorarray(a)={'b'};
facecolorarray(a)={'b'};
markertypearray(a)={'o'};

colorarray(~a)={'k'};
facecolorarray(~a)={'k'};
markertypearray(~a)={'+'};


figure(1)
z = probplot(data(:,1),'noref');
set(z(1),'marker',markertypearray{1},'color',colorarray{1},'linewidth',1, ...
    'markersize',4,'markerfacecolor',facecolorarray{1});

based on this question

How to use different marker colors in a single probplot using Matlab? - Stack Overflow

I cannot get it to work as desired.

Answer 1

[Maik]

%% Sample Data

rng('default');  
x = wblrnd(3,3,[20,1]);
figure; hdata = probplot(x);

%% Get the X & Y data points from hdata

X = hdata(1).XData; 
Y = hdata(1).YData;

%% With Marker Indices you can choose different markers for your data. Here we use 'x' for the first half of points and 'o' for the remaining points.

figure; 
plot(X, Y, 'bx', 'MarkerIndices', 1: length(X)/2)
hold on;
plot(X, Y, 'ro', 'MarkerIndices', length(X)/2:length(X)-1)