The 'plotData' command does not plot the complete set of binary data

Dear Matlabers,

I am trying to plot binary data by using the command called 'plotdata'. In the plot the '+' symbols represent the cases with y==1 and the yellow 'o' symbols represent the cases with y==0. If you open the excel file 'Testset1.xlsx', you can see that there are 16 test samples, and the command only plots 9 of them.

Could you help me to fix this issue, in order for the command to plot the complete 16 samples?

Below I paste the 5 lines of code and the excel file:

data=xlsread('Testset1','Final');

X = data(:, [1, 2, 3, 4]);

y = data(:, 5);

data_X=[X(:,3),X(:,4)];

plotData(data_X, y);

Many thanks,

MH

Answer 1

[Star Strider]

As ‘Udata4’ demonstrates, there are only 9 unique values.

So all the points are plotted, however only 9 of them are different. The 7 that are the same are overplotted on top of each other.

format short g
data = readmatrix('https://www.mathworks.com/matlabcentral/answers/uploaded_files/724374/Testset1.xlsx')

data = 16×5

0.21 30000 2.34 6.69 0 0.21 30000 2.34 7.11 0 0.21 30000 2.34 7.53 1 0.21 30000 2.34 7.95 1 0.21 30000 2.34 8.37 1 0.21 30000 2.34 8.78 1 0.21 30000 2.34 9.2 1 0.21 30000 2.34 9.6 1 0.21 30000 2.34 10 1 0.205 30000 2.34 6.69 0

Lv = data(:,5) == 1;

figure
plot(data(Lv,3), data(Lv,4), '+r')
hold on
plot(data(~Lv,3), data(~Lv,4), 'ob')
hold off
grid

Udata4 = unique(data(:,4),'stable')

Udata4 = 9×1

6.69 7.11 7.53 7.95 8.37 8.78 9.2 9.6 10

.