Bluebit Software Support Forum / Technical Support and Help / Matrix ActiveX Component / Drop a matrix column / Latest PostsInstantForum.NET v4.1.4Bluebit Software Support Forumhttp://www.bluebit.gr/forum/support@bluebit.grWed, 08 Feb 2012 18:12:23 GMT20<link>http://www.bluebit.gr/forum/Topic143-1-1.aspx</link><description>its okay now, ive decided the best way to do it was to build a permutation index by iterating through the array and building a new array. would be easier though if there was a simple delete column/row method.....</description><pubDate>Tue, 28 Nov 2006 07:21:09 GMT</pubDate><dc:creator>zicon</dc:creator></item><item><title /><link>http://www.bluebit.gr/forum/Topic143-1-1.aspx</link><description>i don't want to swap a column with a column at the far right of the matrix. I want to be able to move the column to the far right of the matrix so i can take a submatrix that doesn't include the columns i have moved to the far right of the matrix. (essentially deleting any column that i have moved and shifting all the other columns however many columns to the left)</description><pubDate>Mon, 27 Nov 2006 09:32:25 GMT</pubDate><dc:creator>zicon</dc:creator></item><item><title /><link>http://www.bluebit.gr/forum/Topic143-1-1.aspx</link><description>Try using SwapCols method to exchange column data.</description><pubDate>Mon, 27 Nov 2006 08:42:04 GMT</pubDate><dc:creator>Trifon</dc:creator></item><item><title>Drop a matrix columnhttp://www.bluebit.gr/forum/Topic143-1-1.aspxWhat is the best way to drop columns in a matrix?This carries on from my previous question about variance. I have a matrix M and i want to delete any column in it that has a variance of 0. I have got the check for zero variance working but i'm unsure as the best way to get rid of columns.My current way of thinking is to move all the columns of M that have zero variance to the far right of the matrix and then to use the submatrix method to take only the left-most columns that i want.I am not sure this is the best way to do things though as it seems a bit time consuming creating a permIndex to move every single column to a new place.Mon, 27 Nov 2006 08:28:33 GMTzicon