MATLAB: 3D plotting of experimental data

meshmeshgridsurf

hello there,i have data to be plotted to show spatial and temporal variation of a variable MUF but i dont know how to do it in matlab .i have attached the excel

file containing the data and an image of the expected outcome .please help

Best Answer

This should get you started:

[D,S,R] = xlsread('predicted MUF day(12).xls');
Time = D(:,1);
MUF_Distc = regexp(S, '\w*\d', 'match');
MUF_Dist = str2double([MUF_Distc{:}]);
MUF_Data = D(:,2:end);
figure(1)
surfc(MUF_Dist, Time, MUF_Data, 'EdgeColor','none')
grid on
set(gca, 'YDir','reverse')
xlabel('Distance (km)')
ylabel('Time (UT)')
zlabel('MUF (MHz)')
view([-110 25])

Related Solutions

MATLAB: Contour in a 3D surface plot

contour() object have an undocumented property named ContourZLevel: https://stackoverflow.com/a/8055468/4346708. For example,

[X,Y] = meshgrid(1:0.1:10,1:0.1:20);
Z = sin(X) + cos(Y);
ax = axes();
hold on
view(3);
s1 = surf(X,Y,Z);
[~, s2] = contourf(X,Y,Z);
s2.ContourZLevel = 5;

MATLAB: How to make writetable write sub structures or tables

Hello Scott

As of MATLAB R2018b, "writetable" is not supported for nested tables. However, you can achieve something similar using the following workaround:

1. Create a file transformStruct.m with following contents

% Function to transform column with structure entries.
% It takes in a structure array and return two column 
% arrays, one for each field of the structure
function [a b] = transformStruct(stArr)
a=[];
b={};
for i=1:length(stArr)
    a(i) = stArr(i).a;
    b{i} = stArr(i).b;
end
a=a';
b=b';
end

2. A file transformArr.m with following contents

% Function to transform column with array entries.
% It takes in a double array and returns a cell array of strings
function out = transformArr(arr)
out = {};
for i=1:size(arr,1)
    out{i} = mat2str(arr(i,:));
end
out=out';
end

3. Finally a file main_script.m with contents

% create structure data with 3 rows
bob = struct();
bob.joe = [1; 2; 3];
bob.sam = ['4'; '5'; '6'];
bob.bill = [[6:10]; [11:15]; [16:20]];
bob.jim = [struct('a',1,'b','q'); struct('a',2,'b','r'); struct('a',3,'b','s')];
% create table from structure data
joe = bob.joe;
sam = bob.sam;
% transform the column bill to a cell array, so it 
% does not split into separate columns
bill = transformArr(bob.bill);
% transform the column jim into two separate columns, one
% for each field 
[jim_a jim_b] = transformStruct(bob.jim);
T = table(joe, sam, bill, jim_a, jim_b);
% write table to file
writetable(T)

Place all three files in a directory, and run the file main_script.m

Best Answer

Related Solutions

MATLAB: Contour in a 3D surface plot

MATLAB: How to make writetable write sub structures or tables

Related Question