How can I find the median of each row in a matrix?

I have a matrix 150x4, how can I create a function to get the median values of all the rows? Without using matlabs existing functions

Final result should be 150 medians

[Image Analyst]

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Answer 1

[Doddy Kastanya]

Try this (assuming that your matrix is called A):

for i=1:150
x=sort(A(i,:));
median_value(i)=0.5*(x(2)+x(3));
end

You will get a vector of median_value at the end with 150 entries.

[Image Analyst]

sort() is an existing MATLAB built-in function that Whale says is not allowed. You'd need to write your own sort routine from low level commands. See Wikipedia for the algorithm.