# How to be able to plot all the data in Matrix and the the mean of matrix in Matlab?

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Tanya on 17 Feb 2014
Commented: Tanya on 17 Feb 2014
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 features (features = 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.
I really appriciate any help
Image Analyst on 17 Feb 2014
Attach your image with the image icon. All I got from your link was the French Google that appeared to be asking me something in French about cookies. And define exactly what you mean by "plot" when you're talking about an feature matrix. Do you mean like you want to plot every row of the matric as a curve or bar chart or what??? What is the mean? It doesn't make sense to take the mean of different measurements unless those measurements are related. For example, if my features are area, perimeter, mean intensity, and centroid, it makes no sense to average those numbers together.
When you say "the mean at the same figure" do you mean the mean for the same image? Or do you mean you want a figure (GUI) with the means all printed in a table on that figure?
Tanya on 17 Feb 2014
Hii..
Here is my code
[a,InputMatrix] = sort(rand(100,50)); %ROW=100 COLUMNS=50
Average=mean(InputMatrix);
[CovarianceMatrix]= cov(InputMatrix);
[EigVector,EigValue] = eigs(CovarianceMatrix);
From that code, I have 100 rows and 50 columns.
Im going to do PCA for mechine learning.
So I have to reduce the dimensionality of my data (in this case represents by a matrix).
I dont know exactly what is column and row of matriks represent as. But I guess, the Column will be as the kind of features and the Row will be the training data.
I already calculate the mean of my input matrix. And the are eigenvector 1 & eigenvector2. Which are the first and second colomn of EigVector
And know, I have to visualize my matrix, the mean, and the eigenvector (as a line) in 2D space in the same figure (at one figure).
How to do that??

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