# How to fixed the axis order in hist3 plot?

2 views (last 30 days)
Adnan Barkat on 4 Jun 2022
Answered: Star Strider on 4 Jun 2022
Hi everyone,
My script works well but there is only one issue, it gives vertical axis as reverse (higher to lower (46 to 45 instead of 45 to 46: Figure attached)
clear all
clc
axial_lat=axial_cat(:,7);
axial_long=-1*axial_cat(:,8);
data=[axial_long axial_lat];
figure;
resolution = [50, 50]; % This defines the how many bins you want 1000mm/10 = 100mm bin size
[n, q] = hist3(data, resolution);
imagesc(q{:}, n');
xlabel('length [mm]');
ylabel('length [mm]');
c = colorbar;
c.Label.String = 'Amount';
set(gca,'ColorScale','log')
Problem 2: I attempt to solve this issue with another approch. Altough the axis issues is solved by second approch but resolution is limited like 10 by 10, where i need 50 by 50;
My attempt is as below:
figure;
hist3(F,'CdataMode','auto')
xlabel('Longitude (W{\circ})')
ylabel('Latitude (N{\circ})')
xlim([-130.05 -129.95])
ylim([45.9 46])
yticks(45.9:0.05:46);
% ax=gca
% ax.yTick = 45.9:2:46;
colorbar
set(gca,'ColorScale','log')
a = colorbar;
a.Label.String = 'Event count';
view(2)
figure shows 10 by 10 resolution, how can i increase resolution in second case.

Star Strider on 4 Jun 2022
The problem may be using imagesc.
Try
set(gca, 'YDir','normal')
x = randn(100,1);
y = randn(100,1);
data = [x y];
figure;
resolution = [50, 50]; % This defines the how many bins you want 1000mm/10 = 100mm bin size
[n, q] = hist3(data, resolution);
imagesc(q{:}, n');
figure;
resolution = [50, 50]; % This defines the how many bins you want 1000mm/10 = 100mm bin size
[n, q] = hist3(data, resolution);
imagesc(q{:}, n')
set(gca, 'YDir','normal')
.