Loading multiple mat files and plot them right

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Daniel Basow
Daniel Basow 2021-7-18
评论： Mathieu NOE 2021-7-19
I want to plot 3 different .mat files. My Structure looks something like this.
d = dir('*.mat');
Anzmat = length(d);
for j = 1:3 %just use the first 3 Files in the Order structure ->test 1, test 2, test 3
load(d(j).name)
%%%%%%%Calculations%%%%%%%
figure();
plot(t_LP, x_ac)
title('acceleration shorten file x-axis')
xlabel('time (s)')
ylabel('a (m/s^2)')
%%%%%%%Calculations%%%%%%%
figure();
plot(t_LP, y_ac)
title('acceleration shorten file y-axis')
xlabel('time (s)')
ylabel('a (m/s^2)')
%%%%%%%Calculations%%%%%%%
figure();
plot(t_LP, velocity_x)
title('velocity shorten file x-axis')
xlabel('time (s)')
ylabel('v (m/s)')
%%%%%%%Calculations%%%%%%%
figure();
plot(t_LP, velocity_y)
title('velocity shorten file y-axis')
xlabel('time (s)')
ylabel('v (m/s)')
%%%%%%%Calculations%%%%%%%
plot(t_LP,ac,'r')
title('final velocity')
xlabel('time (s)')
ylabel('v (m/s)')
end
Now my aim is to plot the Files: test 1, test 2, test 3 together in one diagramm. So in the end i should have 5 plots and in each are 3 diagramms from the test1,test2,test3 mat data. So i can clearly analyse how different the measurements are in one plot.
  2 个评论
Daniel Basow
Daniel Basow 2021-7-18
编辑：Daniel Basow 2021-7-18
I dont know if its a good solution but my idea is to make following.
At the end of the code i define my ac, t_LP with the numbers from the file. In the outside the For Loop i have all my files seperatly defined an can plot them without any problems.
d = dir('*.mat');
Anzmat = length(d);
for j = 1:3 %just use the first 3 Files in the Order structure ->test 1, test 2, test 3
load(d(j).name)
%%%Calculations%%%%
assignin ('base',['x_ac_' num2str(j)], x_ac);
assignin ('base',['y_ac_' num2str(j)], y_ac);
assignin ('base',['t_LP_' num2str(j)], t_LP);
assignin ('base',['velocity_x_' num2str(j)], velocity_x_);
assignin ('base',['velocity_y_' num2str(j)], velocity_y_);
assignin ('base',['ac_' num2str(j)], ac);
end
hold on
plot(t_LP_1,x_ac_1)
plot(t_LP_2,x_ac_2)
plot(t_LP_3,x_ac_3)
hold off
.....
Does it have a better option to do this?

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采纳的回答

Mathieu NOE
Mathieu NOE 2021-7-19
hello
based on the first post you can do that : tested with dummy data ( commented lines) of different size ... so it works whatever the size of each individual file , assumed the same variable names are present in all files :
%% dummy data
% clc
% clearvars
%
% N = 10;
% t_LP = (1:N);
% x_ac = 1*ones(size(t_LP));
% y_ac = 0.1*t_LP;
% velocity_x = 1*randn(size(t_LP));
% velocity_y = 1*sin(t_LP);
% ac = x_ac + y_ac;
% save test1.mat t_LP x_ac y_ac velocity_x velocity_y ac
%
% N = 20;
% t_LP = (1:N);
% x_ac = 2*ones(size(t_LP));
% y_ac = 0.2*t_LP;
% velocity_x = 1*randn(size(t_LP));
% velocity_y = 1.5*sin(t_LP);
% ac = x_ac + y_ac;
% save test2.mat t_LP x_ac y_ac velocity_x velocity_y ac
%
%
% N = 30;
% t_LP = (1:N);
% x_ac = 3*ones(size(t_LP));
% y_ac = 0.3*t_LP;
% velocity_x = 1*randn(size(t_LP));
% velocity_y = 2*sin(t_LP);
% ac = x_ac + y_ac;
% save test3.mat t_LP x_ac y_ac velocity_x velocity_y ac
clc
clearvars
d = dir('test*.mat');
Anzmat = length(d);
for j = 1:3 %just use the first 3 Files in the Order structure ->test 1, test 2, test 3
filename = d(j).name;
load(filename)
legend_string{j} = filename(1:length(filename)-4); % filename without the .mat extension
%%%%%%%Calculations%%%%%%%
figure(1);hold on
plot(t_LP, x_ac)
title('acceleration shorten file x-axis')
xlabel('time (s)')
ylabel('a (m/s^2)')
legend(legend_string);
%%%%%%%Calculations%%%%%%%
figure(2);hold on
plot(t_LP, y_ac)
title('acceleration shorten file y-axis')
xlabel('time (s)')
ylabel('a (m/s^2)')
legend(legend_string);
%%%%%%%Calculations%%%%%%%
figure(3);hold on
plot(t_LP, velocity_x)
title('velocity shorten file x-axis')
xlabel('time (s)')
ylabel('v (m/s)')
legend(legend_string);
%%%%%%%Calculations%%%%%%%
figure(4);hold on
plot(t_LP, velocity_y)
title('velocity shorten file y-axis')
xlabel('time (s)')
ylabel('v (m/s)')
legend(legend_string);
%%%%%%%Calculations%%%%%%%
figure(5);hold on
plot(t_LP,ac);
title('final velocity')
xlabel('time (s)')
ylabel('v (m/s)')
legend(legend_string);
end

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