Error using histc Edge vector must be monotonically non-decreasing.

Hi

I have the following code and data;

clc
clear all
datapoint = [0; 2; 0; 2; 5; 8; 7; 10; 21; 38; 51; 53; 84; 93; 115; 123; 134];

for j =1:length(datapoint)
    value =datapoint(j);
    for i = 1:value
        xpos(i,j) = 600*rand();
        ypos(i,j) = -1.75+ 3.5*rand();
    end
end
xpos(xpos==0)=nan;
ypos(ypos==0)=nan;
label = 1200:100:2800;
%% Spatial distribution
for k = 1:17
    ax(i) = subplot(1,17,k);
    values = hist3([ypos(:,k) xpos(:,k)],[4 60]);
    V = values.';
    Vq = interp2(V,5);
    imagesc(Vq);
    %grid on
    caxis([0 7]);
    if k == 1
          axis on
      else 
          set(gca,'yticklabel',{[]})
    end
    set(gca,'xticklabel',{[]})
    xlabel(label(1,k));
    end

Once I ran it, I got the error in title. Can someone help me to solve the problem?

I am supposed to get the figure like following. Other codes to plot similar figure can also help.

Answer 1

[Sindhu Karri]

Hii,

The error is due to following code lines:

xpos(xpos==0)=nan;
ypos(ypos==0)=nan;

By modifying these lines as below

xpos(xpos==0)= 0;
ypos(ypos==0)= 0;

You can avoid the error and get the desired plot

[Mudasser Seraj]

Thank you. I have tried your way. It's generating the image, but now it has another issue for data like

datapoint = [0; 2; 0; 2; 5; 8; 7; 10; 21; 38; 51; 53; 84; 93; 115; 123; 134];

I am getting the following figure with deep yellow at some location, which is unusual.

I don't know why, is there any solution to this?