如何在Matlab中绘制矩阵和矩阵的均值？

Question

Heiii,,

If I have Matrix

 A= n*m 
 and 

 average=mean(A).

How I can possible to plot all the value in matrix (there will be n points) and a Average at the same figure in Matlab??

Anyone has the solution??

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QUESTION

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I want to plot my data for PCA.

For ex/ I have 100*50 matrix.

Im now sure, but may be we can consider the column as the feature (feature = 50). And for the row, I may be the training data.

So we have 100 training data/image. And I also have mean from my initial matrix.

So, now, Im going to plot each data(100) for every feature (50) and also the mean at the same figure.

Here is the example of figure I want to plot ..

Can u please help me solve this Master ;)

Answer 1

The following answer of mine assumes that you have a matrix of nxm . Then you can use 3-D scatter-plot as follows:

%creating all combinations of x and y coordinates
[x,y]=meshgrid(1:size(A,2),1:size(A,1));
x=x(:);
y=y(:);

%plotting values of A such that X-Y axis represent the column and row coordinates of A
%respectively. Z-axis represents the value at that coordinate.
scatter3(x,y,A(:),30,'rx');

%plotting the mean at the center of the coordinate system
hold on;scatter3(mean([1:size(A,2)]),mean([1:size(A,1)]),mean2(A),60,'go','filled');

Answer 2

If it's meaningful to plot each row of A with a different curve (you don't specify how you want to plot A ):

plot(A.') %'// plot(X) plots the *columns* of X
hold on
plot(mean(A),'k--') %// plot the mean of (the rows of) A