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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 Message: * HTML is OFF * Forum Code is ON Smilies [quote][i]Originally posted by ovince[/i] [br]hi, I have a very strange problem with Append() function. In the example bellow, I calculate Dataset q (red) and what is appended to Worksheet wksNew (green) is not the same as q. I am checking the first element of q (pink) in the loop and what is appended to wksNew is not the same number. I check for other elements (q[1]....) also and the result is the same. In summary, within the loop everything is calculated correctly but something goes wrong when append with Append(). what I do wrong? //take 1st column Dataset curr( wks, 1); for (int j=2; j<11; j++) { //take next columns Dataset next( wks, j ); printf("ln(HaHb): %f\n", ln(HaHb[j-1]/HaHb[0])); Dataset div = -ln(next / curr); printf("div[0]: %f\n", div[0]); [red]Dataset q = div/ln( HaHb[j-1]/HaHb[0] ); [/red] [pink]printf("q[0]: %f\n", q[0]);[/pink] Dataset tmpY(wksNew, j-1); [green]tmpY.Append(q);[/green] } oliver [/quote]   Check here to include your profile signature. Check here to subscribe to this topic.