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Scatter point with matrix blocks

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Hozan Sulaiman
Hozan Sulaiman 2021-3-3
评论： Mathieu NOE 2021-3-15
Hi,
Make a scatter diagram like the below attached one? I've got period on my x axis and wave height on the y axis, but would like to group them and can't figure that out. Appreaciate your help.
figure(1)
scatter(T_p,H_s)
figure(2)
scatter(z,H_s)
  2 个评论
darova
darova 2021-3-4
How do you want to group them? Maybe by high water level z(m)?
Hozan Sulaiman
Hozan Sulaiman 2021-3-12
Just as the figure I've uploaded, within an interval of height and water level, how many points I've got.
Thank you.

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回答（1 个）

Mathieu NOE
Mathieu NOE 2021-3-12
hello
this coud do the trick
example below :
%% generate a test matrix
A = round(10*rand(20, 20));
%% visualize the matrix
matvisual(A, 'annotation')
grid off
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Matrix Visualization with MATLAB Implementation %
% %
% Author: Ph.D. Eng. Hristo Zhivomirov 12/02/18 %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
function matvisual(A, varargin)
% function: matvisual(A, varargin)
% A - m-by-n matrix to be visualized with up to 3 pages
% varargin - type 'annotation' in the place of varargin if one want to
% annotate the matrix plot (x-label, y-label, etc.)
% check the input
if ~isreal(A) | isempty(A) | ischar(A) | ndims(A) > 3
errordlg('The data array is not suitable for visualization!', ...
'Error!', 'modal')
return
end
% determine the matrix size
[M, N, P] = size(A);
% loop through the matrix pages
for p = 1:P
% prepare page-by-page visualization
if P > 1, subplot(1, P, p), end
% visualize the matrix
himg = imagesc(A(:, :, p));
grid on
% annotation
if strcmp(varargin, 'annotation')
% x-label, y-label, x-ticks, y-ticks, title
set(gca, 'FontName', 'Arial', 'FontSize', 12)
xlabel('Column number')
ylabel('Row number')
if P > 1, title(['Matrix page ' num2str(p)]), end
if M <= 50, set(gca, 'YTick', 1:M), end
if N <= 50, set(gca, 'XTick', 1:N), end
end
% values labeling
for m = 1:M
for n = 1:N
text(n, m, num2str(A(m, n, p), 3), ...
'FontName', 'Arial', ...
'FontSize', round(6 + 50./sqrt(M.*N)), ...
'HorizontalAlignment', 'center', ...
'Rotation', 45)
end
end
% % set the datatip UpdateFcn
% cursorMode = datacursormode(gcf);
% set(cursorMode, 'UpdateFcn', {@datatiptxt, himg})
end
end
function text_to_display = datatiptxt(hDatatip, himg)
% determine the current datatip position
pos = get(hDatatip, 'Position');
% form the datatip label
text_to_display = {['Row: ' num2str(pos(2))], ...
['Column: ' num2str(pos(1))], ...
['Value: ' num2str(himg.CData(pos(2), pos(1)))]};
end
  2 个评论
Hozan Sulaiman
Hozan Sulaiman 2021-3-15
Hi, it doesn't, this is basically what I've written :
Mdata = scatter_function("C:\m\P2\Mdata.xlsx", "1210467 - Metocean study for th", [11, 175330]);
%U_10= Mdata(:,2)
%Wind_D=Mdata(:,4)
H_s=Mdata(:,6)
T_p=Mdata(:,8)
%Wave_D=Mdata(:,10)
z=Mdata(:,12)
%Uc_x=Mdata(:,14)
%Uc_y=Mdata(:,16)
figure(1)
scatter(T_p,H_s)
figure(2)
scatter(z,H_s)
You've used a matrix, I'm not sure I know how to use it for the 2 different vectors I've got.
So these 2 figures are what I get, and I want to split those into intervals as you've shown.
Thank you for your help
Mathieu NOE
Mathieu NOE 2021-3-15
hello
IMO you have to plot a Bivariate histogram plot
Bivariate histogram plot - MATLAB (mathworks.com)
then either you stick to the graphical 3D rendering (example of the histogram2 function )
, or you can use my previous suggestion
hope it helps

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