How to run this code in a for loop?

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Ashfaq Ahmed
Ashfaq Ahmed 2022-4-15
编辑： Ashfaq Ahmed 2022-4-25
Hi all!
I have a code that requires to go to the folder, calls mat files and then plot images. I want to run everything in a for loop. Could you please tell me how can I do this? The individual code is like this -
%% Day 01
cd(strcat('/Users/aahmed78/PhD/Data/Day26/Two Particle'));
load('Day01_Path.mat');
Leng = numel(t);
plot(p0_x,p0_y);
for i = 1:Leng
figure(1); hold on;
title('26-April-2015 to 02-May-2015','fontsize',20);
plot(px(i,:),py(i,:),'o','MarkerSize',2,'color',[0 1 0]);
end
hold on;
%% Day 02
cd(strcat('/Users/aahmed78/PhD/Data/SWOT/Day27/Two Particle'));
load('Day02_Path.mat');
Leng = numel(t);
plot(p0_x,p0_y);
for i = 1:Leng
figure(1); hold on;
title('26-April-2015 to 02-May-2015','fontsize',20);
plot(px(i,:),py(i,:),'o','MarkerSize',2,'color',[0 1 0]);
end
hold on;
%% Day 03
cd(strcat('/Users/aahmed78/PhD/Data/SWOT/Day28/Two Particle'));
load('Day03_Path.mat');
Leng = numel(t);
plot(p0_x,p0_y);
for i = 1:Leng
figure(1); hold on;
title('26-April-2015 to 02-May-2015','fontsize',20);
plot(px(i,:),py(i,:),'o','MarkerSize',2,'color',[0 1 0]);
end
hold on;
an so on for the 7 days. Please note that the folders name are Day26, Day27, Day28, ..., Day32. But the .mat file that I call is Day01, Day02, ... ,Day07. Rest of the codes are the same. I wrote down this code to solve -
for k = 1:7
cd(strcat('/Users/aahmed78/PhD/Data/Day',num2str(day(k+26)),'/Two Particle'));
load('Day0',num2str(day),'_Path.mat');
Leng = numel(t);
plot(p0_x,p0_y); hold on;
for i = 1:Leng
figure(1); hold on;
title('26-April-2015 to 02-May-2015','fontsize',25);
plot(px(i,:),py(i,:),'o','MarkerSize',2);
hold on;
end
hold on;
end
But it is showing me
Index exceeds the number of array elements (1).
Any feedback from you guys will be much appreciated!

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采纳的回答

Raymond Norris
Raymond Norris 2022-4-15
You don't provide the line number of the error. What is day? Is that they time function? Couldn't
day(k+26)
be written as just
k+26
And then
load('Day0',num2str(day),'_Path.mat');
would be
load('Day0',num2str(k),'_Path.mat');
Secondly, you ought to be able to vectorize your inner for-loop to a single call to plot. Your call to load is missing a concatenation. You left off the color for plotting px/py. Try the following
hold on
for k = 1:7
cd(strcat('/Users/aahmed78/PhD/Data/Day',num2str(k+26),'/Two Particle'))
load(['Day0',num2str(k),'_Path.mat'])
plot(p0_x,p0_y)
plot(px,py,'o','MarkerSize',2,'color',[0 1 0])
end
title('26-April-2015 to 02-May-2015','fontsize',25)
hold off
  2 个评论
Rik
Rik 2022-4-15
You should load to a variable, and you probably want to use sprintf to compose the file name.

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