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Screensize: 640 x 480 800 x 600 1024 x 768 1280 x 1024 UserName: Password: Anti-Spam Code: Format Mode: Basic  Help  Prompt  Format: Font Andale Mono Arial Arial Black Book Antiqua Century Gothic Comic Sans MS Courier New Georgia Impact Lucida Console Script MT Bold Stencil Tahoma Times New Roman Trebuchet MS Verdana   Size 1 2 3 4 5 6   Color Black Red Yellow Pink Green Orange Purple Blue Beige Brown Teal Navy Maroon LimeGreen Forum: Forum for Automation Server/COM and LabVIEW Subject: Message: * HTML is OFF * Forum Code is ON Smilies Hi, In the MATLAB example, the following lines were used to add data to the graph: % Add data to data range invoke(dr, 'Add', 'X', worksheet, 0 , 0 , -1, 0 ); invoke(dr, 'Add', 'Y', worksheet, 0 , 1 , -1, 1 ); What do these last four digits signify? My only guess right now is that the last digit is the column from which the data is taken, but when I add more lines for an extra data series like this: invoke(dr, 'Add', 'X', worksheet, 0 , 0 , -1, 0 ); invoke(dr, 'Add', 'Y', worksheet, 0 , 1 , -1, 1 ); invoke(dr, 'Add', 'X', worksheet, 0 , 0 , -1, 2 ); invoke(dr, 'Add', 'Y', worksheet, 0 , 1 , -1, 3 ); The resulting graph looks very screwy (see image here: http://imgur.com/7IIV13Q) with straight lines across that shouldn't be there and the data looping back on itself oddly. Thanks, John Origin 2016 Operating System: Win10   Check here to subscribe to this topic.