You have a data array X of size n-by-2. The description of the data says that the first column contains the observation number and the second column contains the data values. Missing data is indicated...

You have a data array X of size n-by-2. The description of the data says that the first column contains the observation number and the second column contains the data values. Missing data is indicated by –100. Write a MATLAB code that will compute the mean of the data (the second column). You must find a way to exclude the –100’s from the computation.