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

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Mudasser Seraj
Mudasser Seraj 2020-5-13
评论： Mudasser Seraj 2020-5-20
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.

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回答（1 个）

Sindhu Karri
Sindhu Karri 2020-5-19
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
  1 个评论
Mudasser Seraj
Mudasser Seraj 2020-5-20
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?

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