Finding the maximum value from multiple excel files

I have been assigned a task to find the maximum values from each of many excel files that i have been provided with. Not sure how to do that as i am new to matlab. It would be great if someone could help

[Geoff Hayes]

Zarif - is there a single column in each Excel file or multiplie columns? Do all Excel files share the same properties (number of rows, number of columns, all numeric content, etc.) or are they different? Are all the files in the same folder or different folders? Please provide more details and describe what you have attempted so far.

[Zarif Feroze]

There are multiple rows and columns. Same number of rows and columns. Numeric content except for the heading. The files are in the same folder. All i need to do is find the max value FOR EACH EXCEL SPREADSHEET.

[David Hill]

a=max(readmatrix('spreadsheet.xls'),[],'all');%give you max of read spreadsheet