Creating a dynamical plot with a for loop

1 次查看（过去 30 天）
yoni verhaegen
yoni verhaegen 2015-12-3
编辑： yoni verhaegen 2015-12-3
Imagine we quickly create a matrix with some values in it, called 'number':
matrix1=rand(10);
m=0.5;
number=zeros(size(matrix1));
for i=2:9
for j=2:9
number1(i,j)=(matrix1(i,j+1).*m);
number2(i,j)=(matrix1(i+1,j).*m);
number(i,j)=sqrt((number1(i,j))^2+(number2(i,j))^2);
end
end
imagesc(number)
You can see that the value of number(i,j) is dependent on m. Now i want to make a plot where m values vary in function of the day of the year.
mnew=zeros(365,1);
for s=1:365
mnew(s)=m*s;
end
I now got number(i,j) with the values that should be dependent on m, and a file with the temporal evolution of m throughout the year. How can i now create a dynamic graph that will show the evolution of number(i,j) throughtout the year (as a function of varying m)?
Thanks in advance!
  2 个评论
Image Analyst
Image Analyst 2015-12-3
So you have 8 i and 8 j - so that's 64 values for "numbers", but 365 m values. So which 64 m values do you want to use out of the 365 available to you?
yoni verhaegen
yoni verhaegen 2015-12-3
编辑：yoni verhaegen 2015-12-3
number(i,j) is the matrix where the spatial distribution of the values created in the first loop is shown (64 values). However, these are dependent on m. I want to create a dynamic graph which shows how the values of number(i,j) will change when m changes, thus showing the temporal evolution (365 values of m since there are 365 days in a year). So m is dependent on the day of the year (second loop) and I want to implement this in the graph.
Iteration 1 -> m = 0.5 -> number(1,1) = ... number (1,2) = ..., number(1,3) = ... etc.
Iteration 2 -> m = 1 -> number(1,1) = ... number (1,2) = ..., etc.
Iteration 3 -> m = 1.5 -> number(1,1) = ... number (1,2) = ..., etc.

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

jgg
jgg 2015-12-3
I think you could try just make a function, calling number_func(m) which nests the code above.
Then, evaluate number_func for your values of m, storing the output matrix.
Then, you can just plot for each (i,j) the values versus m in any plot you want. That seems like the simplest way.
However, you can get crazy in the following way by animating it. I think this looks really neat:
matrix1=rand(10);
m=0.5;
number=zeros(size(matrix1));
for k = 1:365
m_s = m*k
for i=2:9
for j=2:9
number1(i,j)=(matrix1(i,j+1).*m_s);
number2(i,j)=(matrix1(i+1,j).*m_s);
number(i,j)=sqrt((number1(i,j))^2+(number2(i,j))^2);
numbers{k} = number;
end
end
end
for k = 1:365
image(numbers{k});
M(k) = getframe;
end
figure
movie(M,5)
if you actually use this code you'll want to pre-allocate the memory but just as a demo this seems good.

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Loops and Conditional Statements 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by