In your expected output matrix, where is the row [0.00 48.77 33.00] coming from?
For the price matrix, you can find the mean directly as following:
pr_mean = mean(Price);
This would return you a Row with the means of the three columns, which is the default behavior.
In case you wanted to find the mean of the Rows, you could do this:
pr_mean_c = mean(Price');
Now, to use the Obtained rows in the output matrix specified by you, you can use the matrix concatenation operations.
To extract certain rows and columns from a matrix, go through the following link:
Once you have the rows / columns you require, it's just a matter of concatenating them. For this, I strongly suggest you go through the following documentation link:
Just remember: ',' to concatenate horizontally and ';' to concatenate vertically. :)
