As per the description, you would like to change the data range for an Excel Chart using actxserver in MATLAB. Below is a code snippet that achieves the same.
excel = actxserver('Excel.Application');
excel.Visible = true;
excel.DisplayAlerts = false;
filename13 = 'C:\Dropbox\Idenglobal\Comparacion peers.xlsx';
pee = excel.Workbooks.Open(filename13);
peesheet = pee.Sheets.Item('Sheet1');
pC = peesheet.ChartObjects(1).Chart
pC.SeriesCollection(1).Values = peesheet.Range('W2:W69');
pC.SeriesCollection(1).XValues = peesheet.Range('Q2:Q69');
In the above code snippet Values corresponds to Y axis range of values. Similarly XValues corresponds to X axis range of values. By changing the range to 69, the previous range will be reset.
Also,I am assuming this chart will be the first chart in the Excel sheet selected (peesheet.ChartObjects(1).Chart).
Refer to the link below for more information on Series object properties: https://msdn.microsoft.com/en-us/library/office/ff838988.aspx
